AI Consensus Index

Best Stairlifts With Professional Installation (2026)

Bruno leads the September 2026 consensus ranking for Dealer Network & Installation Quality, followed by Bedco Mobility and Handicare.

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Answer Capsule

Bruno leads the September 2026 consensus ranking for Dealer Network & Installation Quality, followed by Bedco Mobility and Handicare. The current study includes 7 valid AI-platform responses and 8 qualifying entities. Compared with August 2026, the leader changed. The current list added Bedco Mobility, Handicare, and Access BDD and removed Stannah Stairlifts, Lifeway Mobility, and HomePro Mobility. This is an immediately preceding-month comparison. Rank movement measures changes in this collection of standardized AI-platform responses. It is not product testing, customer-review evidence, or proof that a provider's underlying quality improved or declined.

What Changed Since August 2026

This comparison uses the immediately preceding completed month.

Bruno remained No. 1 in September 2026. It was named by 7 platforms, compared with 6 in August 2026. Both studies used 7 valid platform responses.

The largest downward moves were Harmar (down 1), Acorn Stairlifts (down 1), and 101 Mobility (down 1).

The current qualifying set added Bedco Mobility, Handicare, and Access BDD. It no longer includes Stannah Stairlifts, Lifeway Mobility, and HomePro Mobility from the earlier top group. Entry or exit reflects the minimum-mention rule and the current response set, not a product launch, discontinuation, or quality finding.

Current rankEntityPrevious rankRank movementCurrent mentionsPrevious mentionsMention change
1Bruno1No change76+1
2Bedco Mobility—New7——
3Handicare—New5——
4Harmar3Down 144+0
5Acorn Stairlifts4Down 144+0
6101 Mobility5Down 134-1
7Access BDD—New3——
8AmeriGlide8No change32+1
—Stannah Stairlifts2Exited—4—
—Lifeway Mobility6Exited—3—
—HomePro Mobility7Exited—2—

The table is calculated directly from the two stored ranking datasets. Positive rank movement means an entity moved closer to No. 1; mention change shows the difference in the number of included platform responses naming it.

The August 2026 edition preserves the complete earlier ranking and methodology for reference.

Research Snapshot

  • Topic: Best stairlifts for dealer network and installation quality in the United States.
  • Target buyer: Homeowners who want measurement, installation, maintenance, and service handled by an experienced local dealer or certified installer.
  • Platforms included (7): openai, anthropic, deepseek, grok, perplexity, kimi, google.
  • Research date: 2026-09-27 (authoritative run date).
  • Unique entities named: 15.
  • Qualifying entities: 8.
  • Eligibility rule: Named by at least two platforms during ranking discovery.
  • Ranking unit: Stairlift model and installation provider.
  • Geography: United States.

Platform-reported research dates differ from the authoritative run date (for example, anthropic reported 2026-01-15 and deepseek reported 2026-05-28 for Bruno). Those dates are provenance metadata and do not independently prove freshness.

The Consensus Ranking

Questions This Section Answers

  • What are the best stairlift brands and installation providers for dealer network and installation quality in 2026?
  • Which stairlift company is named most often across AI platforms when professional installation matters?
  • How many AI platforms named each stairlift brand for dealer-installed measurement and service?

Platform mentions count only platforms that named the entity during ranking discovery. All 7 platforms evaluated fit, but not every platform named every entity.

RankEntityPlatform mentionsAverage listed positionBest positionBest considered for
1Bruno71.431Homeowners wanting a Bruno-authorized dealer to assess the staircase and install the lift rather than self-installation; Straight indoor staircases where the Elan offers a lower-capacity, space-conscious option; Curved or more complex staircases requiring a custom Elite curved rail
2Bedco Mobility72.861Homeowners in Maryland, Washington, D.C., and Northern Virginia who want a local Stannah dealer rather than an online seller.; Buyers needing a measured and fitted straight, curved, or outdoor stairlift, including complex stair layouts.; Homeowners who value showroom access, in-home assessment, local technicians, and post-installation service.
3Handicare55.84Homeowners who want an authorized dealer to conduct the sale, site assessment, installation, warranty coordination, and service.; Straight staircases where the Handicare 1100's enclosed rail, battery operation, safety sensors, and optional slide-track or hinge features are relevant.; Curved staircases requiring a custom-measured and fabricated rail, where the Freecurve's authorized-dealer assessment and installation process is appropriate.
4Harmar44.52Homeowners who want Harmar’s dealer locator, in-home assessment, installation, and post-sale service coordinated locally.; Straight staircases where the Pinnacle SL600’s 350-pound capacity, compact folded width, battery backup, and low-maintenance drive are useful.; Curved or complex staircases where a dealer must measure and configure a Helix custom rail.
5Acorn Stairlifts44.753Straight staircases needing an Acorn 130 and potentially rapid installation.; Curved or multi-landing staircases where the Acorn 180 modular rail system and manufacturer-led survey are useful.; Homeowners who prefer one company to handle the survey, installation, warranty, and servicing.
6101 Mobility33.02Homeowners wanting one local provider for measurement, product selection, installation, warranty coordination, repairs, and maintenance.; Buyers who prefer a dealer-supported purchase over online equipment-only sales.; Straight, curved, or outdoor stairlift buyers who need a site-specific quote and installation.
7Access BDD36.335Homeowners who want the purchase and installation handled through a local authorized dealer rather than directly online.; Curved or complex staircases where the Flow X requires a custom rail and an in-home assessment.; Buyers who value ongoing access to local maintenance and repair support.
8AmeriGlide38.07Homeowners who want a nationally available, direct-to-consumer stairlift with an option for paid professional installation.; Straight-stairlift buyers who value transparent installation add-on pricing and are willing to verify the assigned local installer.; Buyers comfortable coordinating warranty and service through a manufacturer-supported dealer network rather than a clearly identified local franchise.

Which Option Is Best for Which Version of the Buyer Need?

Questions This Section Answers

  • Which stairlift provider should a buyer choose if they want a factory-trained authorized dealer rather than a direct manufacturer sale?
  • Is a regional dealer like Bedco Mobility better than a national brand for homeowners who want local showroom access?
  • Which stairlift company is best for a buyer who needs one local provider to compare multiple brands?
Buyer needBest-fit optionWhy it fitsMain trade-off
Manufacturer-authorized dealer network with straight and curved optionsBruno7 of 7 platforms named it; authorized-dealer-only installation tied to warranty [e1:openai:c4]Dealer-dependent pricing, timelines, and service quality
Local showroom, in-home estimate, and same-week straight-lift installation in MD/DC/VABedco MobilityStannah-accredited distributor with stated in-house factory-certified technicians [e2:openai:c1]Regional coverage only; Triple Diamond claim not independently confirmed
One dealer that can compare and install multiple brands101 MobilityFranchise network selling Bruno, Harmar, Handicare, and Savaria models [e6:deepseek:c1]Franchise-by-franchise quality variation
Certified installer vetting with background checks and insuranceHarmarLiftSquad-certified dealers complete factory training and annual background checks [e4:openai:c2]Warranty excludes labor, travel, and service costs
Fast manufacturer-direct installation with one accountable companyAcorn StairliftsFree in-home survey and stated next-day availability in some areas [e5:openai:c3]No independent dealer choice; mixed independent reviews
Complex or narrow curved staircaseAccess BDDFlow X custom rail with dealer assessment and Florida training center [e7:openai:c5]U.S. warranty terms and dealer coverage not publicly standardized
Lowest published installation add-on pricingAmeriGlideStraight-lift installation advertised from $199; measurement plus installation $725 [e8:openai:c2]Third-party installers; labor excluded from warranty
Savaria-backed dealer channel for the 1100 or FreecurveHandicareAuthorized-dealer-only installation with published service escalation [e3:openai:c5]Brand transition to Savaria creates warranty and service ambiguity
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1. Bruno

Questions This Section Answers

  • Is Bruno worth it for homeowners who want a factory-trained authorized dealer to install a stairlift, and what are its main drawbacks?
  • Which Bruno model should a buyer choose for a straight staircase versus a curved staircase?
  • What should a buyer verify about Bruno's labor warranty before signing a dealer contract?

Bruno is the consensus leader for dealer-network and installation quality, named by all 7 platforms at an average listed position of 1.43 and a best position of 1. Bruno sells through authorized dealers rather than direct, and states that its stairlifts are installed exclusively by authorized Bruno dealers, with warranty questions routed to the local dealer [e1:openai:c4]. The relevant products are the Elan straight indoor stairlift, rated at 300 pounds with a narrow vertical rail, and the Elite series, including a handcrafted curved rail rated at 400 pounds [e1:openai:c5][e1:openai:c3].

Why it ranked here. Bruno was the only entity named by every platform, and six of seven platforms placed it at position 1 or 2. Platforms consistently tied its ranking to the authorized-dealer model: factory-trained dealer installation, in-home consultation, and manufacturer warranty administration through the installing dealer. Bruno's own guide states that indoor stairlifts carry lifetime limited coverage for specified major components, two-year coverage for other parts, and 30 days of labor coverage after installation [e1:openai:c7].

Best suited for. Homeowners who want a Bruno-authorized dealer to assess the staircase and install the lift rather than self-installation; straight indoor staircases where the Elan is appropriate; curved or complex staircases requiring a custom Elite curved rail; and buyers who value manufacturer warranty administration through the installing dealer.

Main strengths for this use case. Manufacturer-directed authorized-dealer installation rather than consumer self-installation; a published dealer locator and local quote pathway [e1:openai:c1]; factory-training claims for dealer installation and service; straight and curved product options; and a warranty framework tied to authorized installation. Platform-reported evidence also cites independent dealer examples, including Lifeway Mobility as a Diamond Award dealer and National Seating & Mobility as Diamond-certified [e1:anthropic:c2][e1:anthropic:c3].

Main limitations. Dealer availability and service responsiveness vary because dealers are locally operated. There is no public nationwide installation-time guarantee or maintenance service-level agreement, and no transparent standard pricing for equipment, installation, maintenance, or repairs. Public materials do not independently verify installation quality or dealer customer-service outcomes. One material inconsistency stands out: the general 2026 guide states 30 days of labor coverage, while one Bruno page contains wording that appears to describe a 30-year labor warranty for a curved indoor stairlift [e1:openai:c8].

Pricing or cost summary. Bruno does not publish a standard U.S. purchase-and-installation price for the Elan or Elite on the reviewed official pages. Pricing is quote-based and depends on model, staircase configuration, options, installation, and local dealer. Annual inspection, cleaning, and lubrication are recommended but not publicly standardized in price. Platform-reported third-party estimates include a straight-lift range of roughly $3,000–$5,500 installed and a curved range of roughly $8,500–$14,000+ [e1:kimi:bruno-site-unverified], and a consumer guide cited dealer installation costs around $200–$700, which is not official Bruno pricing [e1:perplexity:c9]. Pricing confidence is low.

Where platforms disagreed. Fit ratings ranged from "good" (openai, deepseek, kimi) to "strong" (anthropic, google, grok, perplexity). Deepseek rated dealer coverage, installation timeline, technician certification, and support responsiveness as "unclear" because they are not publicly verifiable, while anthropic and google treated the factory-trained dealer mandate as a verified advantage. Kimi noted that Bruno's exact dealer count and geographic density are not publicly disclosed, and that no independent customer satisfaction data exists for Bruno dealers versus competitors.

The complete fit review is available at Bruno.

What Changed Since August 2026

Bruno remained at No. 1, and platform mentions increased from 6 to 7. The September 2026 article rewrites how Bruno is presented to buyers: the brand is now called simply Bruno, and the write-up shifts from a verdict-style summary to structured buyer guidance covering dealer installation, the Elan straight indoor lift with its 300-pound rating, and the Elite curved rail rated at 400 pounds. Earlier notes about typical straight-stairlift installation taking 1–4 hours and a 10-year extended warranty period also no longer appear. Differences between the two editions reflect what each article reports; they do not by themselves prove that the product, service, or price changed.

2. Bedco Mobility

Questions This Section Answers

  • Is Bedco Mobility a good choice for a homeowner in Maryland, Washington, D.C., or Northern Virginia who wants a local Stannah dealer?
  • Does Bedco Mobility's Triple Diamond dealer status mean better installation quality than a national stairlift brand?
  • What should a buyer confirm about Bedco Mobility's warranty and service response times before purchasing?

Bedco Mobility is a regional Mid-Atlantic Stannah dealer that appeared on all 7 platforms at an average listed position of 2.86, with one platform placing it first. It is the only qualifying entity whose fit is defined by geography rather than national reach: it serves Maryland, Washington, D.C., and Northern Virginia, and Stannah lists it as an accredited distributor in the region [e2:openai:c1][e2:perplexity:c2].

Why it ranked here. Bedco ranked second on the strength of a concentrated local service model: free in-home estimates that include staircase measurement and an itemized quote [e2:openai:c3], stated in-house factory-certified technicians with no subcontracting, a Baltimore showroom where buyers can try a working stairlift, and a stated deposit-only payment structure with the balance due at installation. Platform-reported evidence also cites a Stannah Triple Diamond designation, described as the highest Stannah dealer recognition, held by only two dealers in the United States [e2:google:1.4.1].

Best suited for. Homeowners in Maryland, Washington, D.C., and Northern Virginia who want a local Stannah dealer rather than an online seller; buyers needing a measured and fitted straight, curved, or outdoor stairlift, including complex stair layouts; and homeowners who value showroom access, in-home assessment, local technicians, and post-installation service.

Main strengths for this use case. Stannah officially lists Bedco as an accredited distributor [e2:openai:c1]. The dealer offers local in-home assessment, showroom access, installation, and stated local service in its territory. The offering covers straight, curved, and outdoor configurations rather than only standard straight lifts. Bedco states that it uses factory-certified in-house technicians and does not subcontract, and advertises rapid installation availability for stocked straight models [e2:openai:c4].

Main limitations. Coverage is regional, not nationwide. Public pricing and service-contract terms are limited. Installation timelines are advertised rather than guaranteed in a published service-level commitment. Independent evidence on Bedco-specific installation quality, technician response time, complaint handling, and long-term customer outcomes is limited. The Triple Diamond claim and its selection criteria were not independently confirmed by the reviewed Stannah pages, and one platform-reported review noted a customer complaint about delayed weekend technical support after service transitioned to Bedco [e2:google:1.1.7].

Pricing or cost summary. Public sources reviewed do not disclose a reliable all-in price for a Bedco-installed Stannah stairlift. Pricing appears quote-based after an assessment and depends on model, stair configuration, installation, and service terms. Bedco states that it requires a small deposit and does not require full payment until installation, but the amount and terms are unclear. Platform-reported evidence notes installation is included in the quoted price with no separate installation fee [e2:perplexity:c5]. Pricing confidence is low.

Where platforms disagreed. This is the sharpest disagreement in the index. Anthropic and grok rated Bedco "strong," citing Triple Diamond status, in-house technicians, and same-day or next-day service response. Openai, google, and perplexity rated it "good" but flagged that most evidence is company-stated. Deepseek and kimi rated it "uncertain," noting that dealer-tier claims, territory coverage, technician certification, and pricing could not be independently verified, and that official-site retrieval reportedly failed for one or more mentions.

The complete fit review is available at Bedco Mobility.

3. Handicare

Questions This Section Answers

  • Is Handicare or Bruno better for a homeowner who needs a curved stairlift installed by an authorized dealer?
  • Which Handicare stairlift should a buyer choose for a straight staircase, and what does the 24-month parts warranty cover?
  • What should a buyer verify about Handicare's Savaria ownership before signing a dealer contract?

Handicare ranked third, named by 5 of 7 platforms at an average listed position of 5.80 and a best position of 4. It is now part of Savaria, and current product, dealer, warranty, and service information is primarily published under Savaria branding, with the Handicare 1100 straight stairlift and Freecurve curved stairlift sold and installed through authorized Savaria Home Access dealers [e3:openai:c1][e3:deepseek:cite-savaria-acquisition].

Why it ranked here. Handicare ranked on the strength of an authorized-dealer-only installation model with a published service escalation route when the original installer cannot be identified [e3:openai:c5]. Savaria states that its products are sold only through authorized dealers, with a location-matching process based on the customer's address, and that a straight stairlift can be installed in as little as one hour subject to stairs, model, and options [e3:openai:c3]. The Freecurve process is explicitly tied to a dealer home assessment and computer-aided engineering for the custom rail [e3:openai:c2].

Best suited for. Homeowners who want an authorized dealer to conduct the sale, site assessment, installation, warranty coordination, and service; straight staircases where the 1100's enclosed rail, battery operation, safety sensors, and optional slide-track or hinge features are relevant; and curved staircases requiring a custom-measured and fabricated rail.

Main strengths for this use case. Authorized-dealer-only installation and parts channel; dealer involvement from product selection through service; published service escalation; stated 24-month parts coverage plus limited lifetime rail and powertrain coverage subject to conditions [e3:openai:c8]; and a custom curved-rail process tied to home assessment, engineering, fabrication, and dealer installation.

Main limitations. Local dealer quality, geographic coverage, availability, and responsiveness are not standardized in public materials. No public national installation-time guarantee or service-response SLA was identified. No transparent national installed price was identified. Warranty wording differs between concise product pages, brochures, and the full warranty. Manufacturer warranty coverage may not cover all labor, travel, batteries, wear items, misuse, modifications, or inadequate maintenance. Platform-reported evidence also notes that Savaria's "lifetime" motor and gearbox warranty is defined as a 10-year period for indoor units [e3:google:cit_modernize_review].

Pricing or cost summary. No reliable public U.S. purchase-and-installation price was identified for the 1100 or Freecurve. Savaria states that products are sold with installation services priced by the local dealer and that prices vary substantially by project and region. Platform-reported estimates include straight stairlifts at roughly $2,500–$5,000 and curved stairlifts at roughly $8,000–$15,000, with one verified dealer example quoting $4,200 for an installation-inclusive straight unit [e3:anthropic:source_2]. Pricing confidence is low.

Where platforms disagreed. Grok rated Handicare "strong," citing a dealer network described as over 1,000 strong across North America [e3:grok:3]. Kimi rated it "mixed," noting that dealer density, certification specifics, timeline transparency, and independent quality verification lack public documentation. Anthropic, deepseek, google, openai, and perplexity all rated it "good" but flagged that the most important buyer-facing details — pricing, timelines, warranty specifics, and local coverage quality — remain insufficiently public.

The complete fit review is available at Handicare.

4. Harmar

Questions This Section Answers

  • Is Harmar worth it for a homeowner who wants a certified installer with background checks and insurance?
  • Which Harmar stairlift should a buyer choose for a heavy user or a curved staircase?
  • What labor and travel costs does Harmar's warranty exclude, and how much should a buyer budget for service calls?

Harmar ranked fourth, named by 4 of 7 platforms at an average listed position of 4.50 and a best position of 2. Its distinguishing feature is the LiftSquad certified installer program: Harmar states that LiftSquad-certified dealers complete ongoing factory training, carry insurance, and pass annual background checks [e4:openai:c2].

Why it ranked here. Harmar ranked on the strength of a formalized installer qualification program and a broad product range. The Pinnacle SL600 is a straight-stairlift model rated for 350 pounds, folds to approximately 10.5 inches from the wall, operates during power outages for up to 60 trips according to Harmar, and uses a nylon-polymer gear rack that requires no lubrication [e4:openai:c7]. The SL600HD is listed at 600 pounds, and the Helix is intended for custom curved staircases [e4:openai:c9][e4:openai:c5].

Best suited for. Homeowners who want Harmar's dealer locator, in-home assessment, installation, and post-sale service coordinated locally; straight staircases where the Pinnacle SL600's capacity, compact folded width, battery backup, and low-maintenance drive are useful; curved or complex staircases where a dealer must measure and configure a Helix custom rail; and urgent curved-stairlift situations where a local dealer has UP modular inventory.

Main strengths for this use case. Manufacturer-provided dealer locator and local-dealer purchasing model; published LiftSquad qualification claims involving factory training, insurance, and annual background checks; dealer-based assessment, installation, parts, and warranty pathways; a broad straight and curved stairlift range; and a published customer-support channel with hours of Monday through Friday, 8 a.m. to 7 p.m. Eastern Time [e4:openai:c13].

Main limitations. Dealer quality, geographic coverage, inventory, lead time, and service responsiveness can vary. There is no verified national installation-time commitment or service-response SLA. Warranty terms may leave labor, travel, service, and maintenance costs to the homeowner: the SL600HD warranty language states that claims must be reported to the selling dealer and that dealers may charge labor, service, travel, or other associated repair costs not covered by the manufacturer warranty [e4:openai:c12]. Public pricing is quote-based rather than transparent, and Harmar's statements about dealer training and installation quality are primarily company-owned evidence.

Pricing or cost summary. No manufacturer list price or standardized national installation price was verified for the SL600, SL300, SL600HD, Helix, UP, or SL350AC. Platform-reported planning estimates include straight stairlifts at about $4,000–$5,000 and curved stairlifts generally starting around $9,000 [e4:perplexity:c3], with another platform-reported range of $3,000–$9,000 installed for straight models and the Helix starting around $10,995 [e4:google:2.2.7]. Pricing confidence is low to moderate depending on the source.

Where platforms disagreed. Google and grok rated Harmar "strong," emphasizing the LiftSquad network and grease-free design. Anthropic, deepseek, openai, and perplexity rated it "good" but flagged missing pricing, warranty, and timeline transparency. Kimi rated it "mixed," noting that no independent source confirms LiftSquad certification requirements, training duration, or renewal standards, and that Harmar's own dealer locator returned "No Locations Found" for test searches [e4:anthropic:c1].

The complete fit review is available at Harmar.

What Changed Since August 2026

Harmar moved down from No. 3 to No. 4, and platform mentions were unchanged at 4. The September 2026 article reworks how Harmar is presented more than it changes the underlying offer. The earlier write-up led with a dealer-dependent verdict and a straight-or-curved fit; the current section shifts the emphasis to LiftSquad certification, the dealer locator, and local coordination of assessment, installation, and warranty service, while buyer fit now extends to urgent curved jobs where a dealer holds modular UP inventory. Limitations are stated more concretely, including possible dealer-charged labor, service, and travel costs excluded from the warranty. Pricing evidence shifted: the current article newly reports $4,000–$5,000 and $9,000 planning estimates, and the prior $3,500–$5,200 installed range is no longer repeated. Differences between the two editions reflect what each article reports; they do not by themselves prove that the product, service, or price changed.

5. Acorn Stairlifts

Questions This Section Answers

  • Is Acorn Stairlifts a good choice for a homeowner who specifically wants an independent local dealer rather than a manufacturer-direct installer?
  • How fast can Acorn install a straight stairlift, and what does the 12-month warranty cover?
  • What out-of-warranty service and dispatch costs should a buyer expect after Acorn's first-year warranty ends?

Acorn Stairlifts ranked fifth, named by 4 of 7 platforms at an average listed position of 4.75 and a best position of 3. It is the clearest structural outlier in the index: rather than an independent dealer network, Acorn's U.S. materials emphasize a direct manufacturer-led installation and service organization, with the Acorn 130 for straight stairs and the Acorn 180 for curved or multi-landing stairs [e5:openai:c1][e5:openai:c2].

Why it ranked here. Acorn ranked on the strength of manufacturer-managed measurement, rapid installation claims, and a single point of accountability. It advertises a free, no-obligation home survey in which a representative measures the staircase and provides a personalized quotation, and claims installation can occur within a few days, with next-day installation available in some areas and on-site time as little as one hour for straight lifts [e5:openai:c3]. New stairlifts include a stated 12-month manufacturer warranty covering callouts, parts, and labor, subject to terms and conditions [e5:openai:c6].

Best suited for. Straight staircases needing an Acorn 130 and potentially rapid installation; curved or multi-landing staircases where the Acorn 180 modular rail system and manufacturer-led survey are useful; and homeowners who prefer one company to handle the survey, installation, warranty, and servicing.

Main strengths for this use case. Manufacturer-led survey, installation, warranty, and service can reduce handoffs between equipment maker and installer. Acorn advertises broad U.S. technician coverage and 365-day support availability. FastTrack installation claims may be valuable when the homeowner has an urgent mobility need. The 130 and 180 cover common straight and curved residential staircase configurations, and rails attach to the staircase rather than the wall.

Main limitations. Published information does not clearly identify a conventional independent dealer network, local dealer ownership, or local technician coverage for a specific address. Installation speed and service availability are company claims and may vary by geography, staffing, stock, and staircase complexity. No public price list was found for equipment, installation, or extended service plans. Independent reviews and BBB records show meaningful complaints about service delays, installation outcomes, and customer support despite many positive reports [e5:openai:c7][e5:openai:c10]. Platform-reported evidence also cites a ConsumerAffairs rating of 1.8 stars based on 303 reviews [e5:anthropic:9], and out-of-warranty dispatch fees reported around $345 per callout with annual service agreements from $150 to over $400 per year [e5:google:acorn_facebook_serv].

Pricing or cost summary. Acorn does not publish a standard U.S. purchase price for the 130 or 180 on the reviewed product pages. Pricing is quote-based after an in-home survey. Platform-reported installed ranges include $2,500–$5,500 for straight models and $8,000–$14,000 for curved configurations [e5:google:acorn_porchlight_warranty]. Extended warranty and annual service agreement costs are not published on the reviewed pages. Pricing confidence is low to moderate.

Where platforms disagreed. Grok rated Acorn "strong," citing manufacturer-direct installation by trained employees and positive recent Trustpilot reviews. Openai and perplexity rated it "good." Anthropic, deepseek, google, and kimi rated it "mixed," with anthropic stating directly that Acorn's shift away from a dealer network "contradicts the buyer's stated preference for experienced local dealers or certified installers." Google also noted that Acorn's standard 12-month warranty is shorter than dealer-installed competitors.

The complete fit review is available at Acorn Stairlifts.

What Changed Since August 2026

Acorn Stairlifts moved down from No. 4 to No. 5, and platform mentions were unchanged at 4. The September 2026 article recasts Acorn Stairlifts around a different buyer question: whether a homeowner who wants an independent local dealer can accept a manufacturer-direct model instead. The earlier write-up led with speed and cost, calling Acorn a mixed fit; the current section frames it as the index's clearest structural outlier. Pricing evidence also shifted. The current article newly reports an out-of-warranty dispatch fee of about $345 per callout and annual service agreements starting at $150, while the earlier $2,500–$5,000 installed straight-stairlift range is no longer repeated. The earlier claim of roughly one-hour surveys and 1–2 hour straight-rail installations no longer appears, and the current section notes Acorn publishes no standard U.S. purchase price, leaving pricing quote-based. Differences between the two editions reflect what each article reports; they do not by themselves prove that the product, service, or price changed.

6. 101 Mobility

Questions This Section Answers

  • Is 101 Mobility a good choice for a homeowner who wants one local provider to compare and install multiple stairlift brands?
  • How much does a 101 Mobility stairlift installation cost, and what does the included one-year service warranty cover?
  • What should a buyer verify about their specific 101 Mobility franchise before signing a contract?

101 Mobility ranked sixth, named by 3 of 7 platforms at an average listed position of 3.00 and a best position of 2. It is a national franchise network rather than a manufacturer, and its core value proposition is local in-home assessment, professional installation, and ongoing maintenance of third-party stairlift brands including Bruno, Harmar, Handicare, and Savaria [e6:deepseek:c1].

Why it ranked here. 101 Mobility ranked on the strength of a multi-brand dealer model with a local point of contact. It provides a location finder and states that its network has nearly 200 locations across the United States and Canada and operates in 39 states, though its published territory information also shows unavailable or open territories [e6:openai:c5][e6:openai:c6]. For new products that 101 Mobility sells and installs, the company states that it includes a complimentary one-year limited service warranty intended to address diagnosis and repair labor [e6:openai:c3].

Best suited for. Homeowners wanting one local provider for measurement, product selection, installation, warranty coordination, repairs, and maintenance; buyers who prefer a dealer-supported purchase over online equipment-only sales; and straight, curved, or outdoor stairlift buyers who need a site-specific quote and installation.

Main strengths for this use case. Local consultation and measurement are built into the sales process. Installation, warranty service, repair, and maintenance can be handled through the same local provider. The network offers broad geographic reach relative to a single independent installer, and the company offers multiple stairlift manufacturers and configurations rather than a single product line. Platform-reported evidence also cites factory-specific certification training, including one installer who completed week-long training at Harmar and Bruno to achieve dual certifications [e6:anthropic:c3].

Main limitations. Local coverage and service quality can vary by franchise territory. No independently verified national data was found for installation quality, callback times, first-visit repair rates, or customer-support responsiveness. Technician certification is claimed but not specified with a consistent public third-party standard. Installation timelines are not published as a nationwide promise. Official curved-stairlift pricing pages contain conflicting starting-price information: one page says starting at $13,000, while another describes prices starting around $11,000 [e6:openai:c1].

Pricing or cost summary. Pricing is quote-based after consultation. Official 101 Mobility guidance lists straight stairlifts at approximately $2,800–$8,000 installed, with a typical average of about $4,000–$5,000, and states that installation and a one-year service warranty are included. Outdoor pricing is presented around $4,000–$12,000 depending on configuration, and rental pricing is described as commonly approximately $175–$450 per month [e6:openai:c1]. Pricing confidence is moderate.

Where platforms disagreed. Google rated 101 Mobility "strong," citing certified employee-only technicians and the complimentary labor warranty. Openai, anthropic, deepseek, grok, perplexity, and kimi all rated it "good" but emphasized franchise-dependent variability. Platform-reported location counts also conflict: one source cites 207 locations as of January 2025 [e6:anthropic:c1], another cites over 60 locations [e6:perplexity:c3], and the company's own materials cite nearly 200 locations and 39 states [e6:openai:c5].

The complete fit review is available at 101 Mobility.

What Changed Since August 2026

101 Mobility moved down from No. 5 to No. 6, and platform mentions decreased from 4 to 3. The September 2026 article reframes 101 Mobility's pricing evidence, reporting a curved-stairlift figure of $11,000 and outdoor pricing of $4,000–$12,000; the prior $10,000–$15,000 curved range is no longer repeated. The ranking rationale, best-fit guidance, strengths, and limitations are all substantially rewritten, with new emphasis on franchise territory gaps and the absence of independently verified installation-quality data. The recommended configuration is unchanged. 101 Mobility still suits homeowners wanting one local provider for assessment, installation, warranty coordination, and repairs across multiple manufacturers, but the current write-up is more explicit that coverage and service quality vary by territory. Differences between the two editions reflect what each article reports; they do not by themselves prove that the product, service, or price changed.

7. Access BDD

Questions This Section Answers

  • Is Access BDD a good choice for a homeowner with a narrow or complex curved staircase who needs a dealer-installed lift?
  • What warranty does Access BDD offer on the Flow X, and who administers the claim?
  • What should a buyer verify about Access BDD dealer coverage and technician certification in their ZIP code?

Access BDD ranked seventh, named by 3 of 7 platforms at an average listed position of 6.33 and a best position of 5. It is a B2B manufacturer that sells exclusively through authorized local dealers in the U.S., with the Flow X curved stairlift as the most relevant product for complex staircases [e7:openai:c2][e7:google:1.1.5].

Why it ranked here. Access BDD ranked on the strength of a dealer-training infrastructure and a product designed for difficult staircases. It provides a U.S. dealer locator with authorized dealers listed by state, states that local dealers may visit the home to assess the staircase, layout, mobility needs, and user preferences, and opened a Largo, Florida training center in 2025 for hands-on installation and servicing instruction [e7:openai:c1][e7:openai:c3][e7:openai:c5]. The Flow X is presented as a solution for curved and straight staircases, including narrow stairs, using a custom-built rail, with installations typically taking around half a day [e7:openai:c4].

Best suited for. Homeowners who want the purchase and installation handled through a local authorized dealer rather than directly online; curved or complex staircases where the Flow X requires a custom rail and an in-home assessment; and buyers who value ongoing access to local maintenance and repair support.

Main strengths for this use case. Local authorized-dealer purchasing and installation model; a dealer locator showing authorized coverage across U.S. states; company-stated dealer training in installation, technical support, and customer service; Flow X suitability for curved, narrow, and complex staircases; a local-dealer pathway for maintenance, repairs, parts, and warranty-related support; and a dedicated U.S. training center. Platform-reported evidence also cites a lifetime warranty on major components such as the rail, motor, and gearbox, with a 2-year limited warranty on small parts [e7:google:1.4.4].

Main limitations. Service quality and responsiveness may vary by independent dealer. There is no publicly verified ZIP-code-level service coverage, installer workload, or guaranteed appointment window. No standardized public U.S. warranty terms were located, and Access BDD's own terms state that lifetime warranty offers are managed and provided through the local dealer network rather than directly by Access BDD [e7:google:1.4.8]. No public U.S. price list or comprehensive service-fee schedule was located, and company claims dominate the available evidence.

Pricing or cost summary. U.S. pricing for the Flow X, installation, assessment, maintenance, and service is not publicly posted in the reviewed official sources. Access BDD directs buyers to local dealers for a consultation and personalized quote. Platform-reported evidence notes that a non-U.S. product page lists outdoor stairlift pricing starting from £3,000, which is not a verified U.S. installed price and should not be treated as one [e7:perplexity:c9]. Pricing confidence is low.

Where platforms disagreed. Grok rated Access BDD "strong," citing the trained and certified U.S. dealer network and the Florida training facility. Openai, anthropic, google, and perplexity rated it "good" but flagged that public information does not verify dealer-level response times, actual coverage quality at a buyer's ZIP code, standardized installation procedures, or U.S. warranty terms. Deepseek and kimi rated it "uncertain," with kimi stating that network coverage density, assessment quality, installation timelines, certification details, maintenance responsiveness, and warranty handling transparency are "either unverified or unstated."

The complete fit review is available at Access BDD.

8. AmeriGlide

Questions This Section Answers

  • Is AmeriGlide worth it for a homeowner who wants professional installation but is willing to verify the assigned local installer?
  • How much does AmeriGlide charge for measurement and installation, and what fees apply if the order is canceled or returned?
  • What should a buyer check about AmeriGlide's warranty labor coverage and installer licensing before purchasing?

AmeriGlide ranked eighth, named by 3 of 7 platforms at an average listed position of 8.00 and a best position of 7. It is a direct-to-consumer manufacturer that offers professional installation as a paid add-on through a nationwide installer network, with the Rave 2 straight stairlift listed at $2,249 plus shipping on the reviewed sales page [e8:openai:c10].

Why it ranked here. AmeriGlide ranked on the strength of published installation pricing and nationwide availability rather than dealer depth. It offers full-service in-home measurement and installation for a stated $725, while a measurement-only service is listed at $575, and straight-stairlift installation is advertised as low as $199 subject to the specific order [e8:openai:c2]. Curved-stairlift installation is described as included because those units are custom-made and not self-installable.

Best suited for. Homeowners who want a nationally available, direct-to-consumer stairlift with an option for paid professional installation; straight-stairlift buyers who value transparent installation add-on pricing and are willing to verify the assigned local installer; and buyers comfortable coordinating warranty and service through a manufacturer-supported dealer network rather than a clearly identified local franchise.

Main strengths for this use case. Advertised nationwide professional-installation availability; optional in-home measurement rather than requiring every buyer to self-measure; published installation and measurement prices that provide more cost visibility than a quote-only process; dealer documentation emphasizing trained, authorized personnel and annual inspection; and published technical-support and customer-service channels during weekday business hours [e8:openai:c8].

Main limitations. No public searchable directory clearly identifies the local installer assigned to a buyer. There is no published installation scheduling guarantee or service-response-time commitment. No independently verified, uniform certification standard exists for all residential installers. Labor and service-call charges are excluded from the general warranty, which states 30-day battery coverage and two-year coverage for component parts and the drive train for new stairlifts [e8:openai:c9]. Return, freight, and restocking costs can be substantial: straight stairlifts returned within five business days may incur a 15% restocking fee, outbound freight charges, and customer-paid return shipping, and a $200 track-preparation fee may apply after the track is cut [e8:openai:c11]. Platform-reported evidence also cites a CPSC recall involving certain AmeriGlide stairlift models due to a fall hazard [e8:deepseek:c9].

Pricing or cost summary. Public pricing is configuration- and promotion-dependent. The Rave 2 was listed at $2,249 plus shipping on the reviewed sales page. Professional straight-stairlift installation is advertised from $199; combined in-home measurement and installation is listed at $725; measurement-only service is listed at $575. Platform-reported installed ranges include straight stairlifts starting around $1,499 uninstalled and curved models starting around $7,599 with installation included [e8:google:1.2.7]. Pricing confidence is moderate.

Where platforms disagreed. Anthropic rated AmeriGlide "good," citing nationwide coverage and transparent fixed pricing. Openai, deepseek, google, grok, and perplexity rated it "mixed," citing variable third-party installer quality, warranty labor exclusions, and conflicting installation pricing across pages ($199 promotional versus $550–$725 in checkout and support documentation). Kimi rated it "uncertain," noting that the company's primary business model emphasizes self-installation, which may indicate less investment in dealer network quality.

The complete fit review is available at AmeriGlide.

What Changed Since August 2026

AmeriGlide remained at No. 8, and platform mentions increased from 2 to 3. The September 2026 article reframes AmeriGlide around verified installation logistics rather than factory-direct savings, with new buyer-fit guidance and a sharper limitations list covering warranty labor exclusions and a CPSC recall. The pricing evidence was rebuilt: the current section newly reports $200 as a track-preparation fee and $1,499 as a platform-reported starting point for uninstalled straight stairlifts, while the earlier write-up's "$199 to $725" installation range is no longer repeated. Measured details also shifted, with the prior article's 10-day price-match window no longer appearing. No recommended configuration is stated in either edition. Differences between the two editions reflect what each article reports; they do not by themselves prove that the product, service, or price changed.

What the Cross-Platform Study Reveals About This Market

Questions This Section Answers

  • What do AI platforms consistently say matters most when choosing a stairlift installer?
  • Why do stairlift installation prices vary so widely between brands and dealers?
  • Does a larger dealer network actually mean better installation quality for stairlift buyers?

Three structural patterns emerge from the eight qualifying entities.

First, the market splits into three delivery models, and the ranking reflects how well each model maps to the buyer need. Manufacturer-authorized dealer networks (Bruno, Handicare, Harmar, Access BDD) dominate the top of the ranking because they combine factory training claims with local installation. Regional dealers (Bedco Mobility) rank highly when they have manufacturer accreditation and local infrastructure. Direct-to-consumer and franchise models (Acorn Stairlifts, 101 Mobility, AmeriGlide) rank lower or mid-table because the buyer's stated preference is for an experienced local dealer, and these models either bypass dealers or depend on franchise or third-party execution.

Second, pricing opacity is nearly universal. Seven of eight entities do not publish a standard installed price. Only AmeriGlide publishes specific installation add-on pricing ($199 advertised, $575 measurement-only, $725 combined), and even that conflicts across pages. Every other entity routes buyers to a dealer quote after an in-home assessment. This means buyers cannot compare total installed cost across brands without multiple in-home visits.

Third, warranty labor coverage is the most consistent gap. Bruno covers 30 days of labor [e1:openai:c7]. Harmar's warranty excludes labor, travel, and service costs [e4:openai:c12]. AmeriGlide excludes labor and service-call fees [e8:openai:c9]. Acorn covers labor for 12 months but then charges dispatch fees [e5:openai:c6][e5:google:acorn_facebook_serv]. Handicare's warranty is facilitated through the authorized dealer and may exclude labor [e3:openai:c9]. Only 101 Mobility and Bedco Mobility explicitly advertise an included labor or service warranty period, and both are limited to one year or dealer-specific terms.

Where the AI Platforms Agreed

Questions This Section Answers

  • Which stairlift installation claims did all AI platforms agree on?
  • Do AI platforms agree that factory-trained dealer installation is better than self-installation?

Platforms agreed on several points across entity boundaries.

  • Authorized-dealer installation is the dominant quality mechanism. Every platform that discussed Bruno, Handicare, Harmar, or Access BDD treated authorized-dealer installation as the primary quality control, and multiple platforms noted that self-installation or non-authorized work voids manufacturer warranty [e1:openai:c4][e4:openai:c2][e7:google:1.4.8].
  • Pricing is not publicly standardized. Platforms consistently rated pricing confidence as low for Bruno, Bedco Mobility, Handicare, Harmar, Acorn Stairlifts, 101 Mobility, and Access BDD.
  • Dealer quality varies by location. Even platforms that rated an entity "strong" acknowledged that local dealer performance, response times, and service quality are not standardized nationally.
  • Installation time is short once the lift is on site. Platforms repeatedly cited straight-lift installation times of roughly 2–4 hours and curved-lift times of roughly half a day to a full day, though these are company estimates rather than guarantees [e1:openai:c2][e4:anthropic:c5][e5:openai:c3].
  • Warranty labor coverage is limited. Platforms agreed that most manufacturer warranties cover parts rather than labor, travel, or service-call costs.

Where the AI Platforms Disagreed

Questions This Section Answers

  • Why do AI platforms disagree about whether Bedco Mobility and Access BDD are strong or uncertain fits?
  • Which stairlift brand had the widest disagreement between AI platforms on installation quality?

Disagreements were material and are preserved rather than smoothed over.

  • Bedco Mobility: strong versus uncertain. Anthropic and grok rated it "strong" based on Triple Diamond status and in-house technicians. Deepseek and kimi rated it "uncertain" because dealer-tier claims, territory coverage, technician certification, and pricing could not be independently verified, and official-site retrieval reportedly failed for one or more mentions.
  • Access BDD: strong versus uncertain. Grok rated it "strong." Deepseek and kimi rated it "uncertain," with kimi stating that critical evaluation criteria are "either unverified or unstated."
  • Acorn Stairlifts: strong versus mixed. Grok rated it "strong" for manufacturer-direct installation. Anthropic, deepseek, google, and kimi rated it "mixed," with anthropic stating that Acorn's direct model contradicts the buyer's stated preference for local dealers.
  • AmeriGlide: good versus mixed versus uncertain. Anthropic rated it "good." Openai, deepseek, google, grok, and perplexity rated it "mixed." Kimi rated it "uncertain."
  • Bruno's warranty language. Openai flagged a material inconsistency: the general 2026 guide states 30 days of labor coverage, while one Bruno page appears to describe a 30-year labor warranty for a curved indoor stairlift [e1:openai:c8]. Perplexity separately noted that public materials conflict on warranty wording across sources [e1:perplexity:c12].
  • 101 Mobility's location count. Platform-reported counts range from over 60 to 207 locations, and the company's own materials cite nearly 200 locations and 39 states [e6:openai:c5][e6:anthropic:c1][e6:perplexity:c3].

How Buyers Should Choose

Questions This Section Answers

  • What should a buyer check before choosing a stairlift installer for a curved staircase?
  • Which stairlift brand should a buyer pick if guaranteed installation dates and written service terms matter most?
  • How can a buyer compare stairlift installation quotes across brands when pricing is not published?

Start with the delivery model, not the brand. If the buyer's priority is an experienced local dealer with manufacturer backing, the top four entities (Bruno, Bedco Mobility, Handicare, Harmar) are the strongest structural fits. If the buyer wants one company accountable from survey to service and accepts a manufacturer-direct model, Acorn Stairlifts is the relevant option. If the buyer wants to compare multiple brands through one local provider, 101 Mobility is the relevant option. If the buyer has a complex curved staircase, Access BDD's Flow X and Handicare's Freecurve are the two custom-rail options in the index. If the buyer prioritizes published installation pricing over dealer depth, AmeriGlide is the only entity with transparent add-on pricing.

Then verify five things in writing before signing: the identity of the assigned installer and whether they are an employee, authorized dealer, or subcontractor; the specific technician training or certification and its current status; the written installation timeline from deposit to completion; the exact warranty terms for parts, labor, travel, batteries, and service calls; and the total installed price including measurement, delivery, permits, removal of an old lift, and any stair or electrical modifications.

Finally, treat the ranking as a shortlist rather than a verdict. The ranking reflects how often platforms named each entity and where they placed it, not independently verified installation outcomes. A well-vetted local dealer for a lower-ranked brand may outperform a poorly staffed dealer for a higher-ranked one.

For a broader view of the category, see the stairlifts directory.

Methodology

This index was produced from a single standardized prompt sent once to each of 7 included platforms: openai, anthropic, deepseek, grok, perplexity, kimi, and google. The research date was 2026-09-27.

Platforms were asked to identify the best stairlift models and installation providers for homeowners who want measurement, installation, maintenance, and service handled by an experienced local dealer or certified installer in the United States. Entities named by at least two platforms qualified for the final ranking.

The final ranking order is based on platform mentions, then average listed rank, then best listed rank. The ranking table is the sole authority for rank, platform mentions, platform share, average rank, and best rank. Platform mentions count only ranking-discovery mentions and do not reflect how many platforms later completed a fit assessment.

Fit assessments, pricing details, strengths, limitations, and disagreements were drawn from the entity evidence bundles. Citations are platform-reported evidence, not independently verified facts. Company-owned citations materially outnumber independent citations across all eight entities.

Methodology Limitations

  • The study used one standardized prompt sent once to each included platform. AI answers can vary by date, wording, location, account state, model, interface, browsing configuration, and the sources retrieved.
  • Platform-reported research dates differ from the authoritative run date. For example, anthropic reported 2026-01-15 and deepseek reported 2026-05-28 for Bruno. These dates are provenance metadata and do not independently prove freshness.
  • Company-owned citations materially outnumber independent citations. Company claims are not described as independently verified anywhere in this report.
  • The supplied URLs were collected from platform responses and were not independently validated by the writer stage.
  • Official-site retrieval failed for one or more mentions for Bruno, Bedco Mobility, Handicare, and Harmar. No failed fetch was used as a verified domain key.
  • Company-name variants were collapsed onto one canonical brand before minimum-mentions qualification. For Bedco Mobility, it is unclear whether all mentions refer to the same legal entity or service territory.
  • Platform recommendations are market intelligence, not independent customer reviews or proof of quality.
  • Some platform-reported claims come from models without search enabled. Deepseek's research capability for this run had search disabled, so its claims require explicit verification before being described as current facts.
  • Conflicting product names, pricing, and capabilities were described rather than resolved. Buyers should verify all specifics directly with the manufacturer or dealer.

Final Verdict

Bruno is the consensus leader for homeowners who want stairlift measurement, installation, maintenance, and service handled by an experienced local dealer or certified installer, named by all 7 platforms studied. Bedco Mobility is the strongest regional alternative for buyers in Maryland, Washington, D.C., and Northern Virginia, but its fit is geographically bounded and its Triple Diamond claim is not independently confirmed. Handicare, Harmar, and Access BDD offer authorized-dealer models with distinct installer-qualification programs. Acorn Stairlifts, 101 Mobility, and AmeriGlide serve buyers who prioritize manufacturer-direct speed, multi-brand franchise choice, or published installation pricing over dealer depth.

The decisive variable is not the brand. It is the specific local dealer or installer assigned to the job. Buyers should verify installer identity, technician certification, written installation timelines, warranty labor coverage, and total installed price before signing any contract.

Frequently Asked Questions

Which stairlift brand is best for dealer network and installation quality?

Bruno ranked first, named by all 7 platforms studied with an average listed position of 1.43. Bedco Mobility ranked second, also named by all 7 platforms, but serves only Maryland, Washington, D.C., and Northern Virginia.

Is Bruno or Handicare better for a curved staircase?

Both offer custom curved rails installed by authorized dealers. Bruno's Elite curved model uses a handcrafted rail rated at 400 pounds [e1:openai:c3]. Handicare's Freecurve uses a dealer home assessment and computer-aided engineering for the custom rail [e3:openai:c2]. Bruno ranked higher because more platforms named it and placed it higher.

Does self-installation void the stairlift warranty?

For Bruno, Handicare, and Access BDD, platform-reported evidence indicates that non-authorized installation voids manufacturer warranty coverage [e1:openai:c4][e7:google:1.4.8]. AmeriGlide sells self-installation options but excludes labor from its warranty [e8:openai:c9].

How much does professional stairlift installation cost?

Published add-on pricing is rare. AmeriGlide advertises straight-lift installation from $199, measurement-only at $575, and combined measurement and installation at $725 [e8:openai:c2]. Most other entities route buyers to a dealer quote after an in-home assessment.

How long does stairlift installation take?

Platform-reported company estimates cluster around 2–4 hours for straight lifts and roughly half a day to a full day for curved lifts, depending on staircase complexity and rail type [e1:openai:c2][e4:anthropic:c5][e5:openai:c3].

Do stairlift warranties cover labor?

Most do not, or cover it only briefly. Bruno covers 30 days of labor [e1:openai:c7]. Harmar and AmeriGlide exclude labor, travel, and service-call costs [e4:openai:c12][e8:openai:c9]. Acorn covers labor for 12 months, then charges dispatch fees [e5:openai:c6].

Which stairlift company is best for a complex or narrow curved staircase?

Access BDD's Flow X is designed for curved, narrow, and complex staircases using a custom-built rail [e7:openai:c4]. Handicare's Freecurve is the other custom-rail option in the index.

Can I compare multiple stairlift brands through one provider?

Yes. 101 Mobility sells and installs Bruno, Harmar, Handicare, and Savaria models through its franchise network [e6:deepseek:c1].

Consolidated Sources

Company-Owned Sources

Independent Sources

Other Sources

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Study date
September 27, 2026
Platforms analyzed
7
Source records
299
Candidates reviewed
15
Qualified finalists
8

Research trail and source mix

Configured platforms

openai, anthropic, deepseek, grok, perplexity, kimi, google

Source mix

81 independent · 211 company-owned · 7 unclear

Evidence support

230 direct · 54 partial

Important limitation

Exactly 7 platforms were included in this run: openai, anthropic, deepseek, grok, perplexity, kimi, google. The configured source value 7 is provenance only and must never be described as the number of platforms studied.

Source snapshot SHA-256 b15271ca50fd46e12adcbba75d778a7fd55456c56ba64d7112a0f48e13ea9e45

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