Mattress Brands: AI Visibility Market Discovery Index

Benchmark Summary

Questions This Section Answers

• Which mattress brand leads AI recommendation coverage, and how big is the gap to second place?
• How did Sleep Foundation's coverage change between July and October 2026, and which brand led in the months between?
• Has any mattress brand posted a meaningful increase in valid recommendation coverage across the series?

Sleep Foundation led the benchmark in October 2026 with valid recommendation coverage of 4.0%, down from 7.9% in July 2026. The gap to the next brand was just 0.3 percentage points, with Sleepopolis at 3.7% in October 2026, down from 4.9% in July 2026.

No tracked brand posted a significant increase in valid recommendation coverage across the full series, and no tracked brand posted a significant month-over-month movement in October 2026. Sleep Foundation recorded the largest single-month increase, moving from 2.0% in September 2026 to 4.0% in October 2026, within normal variation; no tracked brand declined from September 2026 to October 2026.

Sleep Foundation was the one significant decliner across the full series. Sleep Foundation fell from 7.9% in July 2026 to 4.0% in October 2026, a cumulative drop of 3.9 percentage points that moved beyond normal month-to-month variation, even as it moved up in the final month. After declines in each of the two months from July 2026 to September 2026, the brand rose from 2.0% in September 2026 to 4.0% in October 2026, ending the streak and holding the category lead.

The benchmark began with 800 prompt-surface observations in each month and produced 272 qualified observations in October 2026 after qualification.

Current Benchmark at a Glance

August 2026 and September 2026 sat between these two months, with Sleepopolis as coverage leader in both at 3.5% in August 2026 and 3.0% in September 2026.

Qualified surface breadth counts the number of canonical AI surface families with at least one qualified observation. The six families measured are ChatGPT, Copilot, Gemini, Perplexity, AI Overviews, and AI Mode.

For the strategic interpretation of this benchmark, read CiteWorks Studio's analysis of How AI Search Is Recommending Mattress Brands

Research Scope and Qualification

Questions This Section Answers

• How much of the raw prompt collection actually qualifies as the public benchmark denominator?
• What separates the 800 source prompt-surface observations from the qualified mattress brand observations?

The public benchmark is narrower than the raw collection universe by design.

Brand-level percentages use the qualified observations as the public denominator, not the raw collection. See the AI Visibility Market Discovery Methodology.

Current Brand Standings

Questions This Section Answers

• Which mattress brands rank highest on valid recommendation coverage, and which has the strongest presence rate?
• How do top-three and rank-one rates differ from presence and coverage across the tracked brands?
• Where does Mattress Advisory sit compared with the other tracked mattress brands?

How to Read the Standings

• Presence rate is the share of qualified observations where the brand is mentioned at all.
• Valid recommendation coverage is the share of qualified observations where the brand appears in a valid recommendation shortlist.
• Top-three rate is the share of qualified observations where the brand appears among the top three recommended options.
• Rank-one rate is the share of qualified observations where the brand is the first recommended option.
• Net sentiment reflects the balance of positive versus negative mentions, from 0 to 1.

For formulas and denominator rules, see AI Visibility Market Discovery Metric Definitions.

Recommendation Coverage Movement

Questions This Section Answers

• Which mattress brands declined in valid recommendation coverage since the July 2026 baseline, and by how much?
• What explains Sleep Foundation's coverage drop followed by its October rebound?
• Did Sleep Advisor and the other stable brands show real movement or just single-month noise?

Largest Decline: Sleep Foundation

Sleep Foundation's valid recommendation coverage fell from 7.9% in July 2026 to 2.8% in August 2026 to 2.0% in September 2026, before rising to 4.0% in October 2026. The cumulative drop of 3.9 percentage points from July 2026 to October 2026 moved beyond normal month-to-month variation, while the move from 2.0% in September 2026 to 4.0% in October 2026 was within normal variation and ended the three-month decline. The brand's presence rate rose from 81.6% in July 2026 to 89.7% in October 2026, its top-three rate moved from 2.6% to 3.3%, and its rank-one rate moved from 0.0% to 1.5% over the same period, so the brand remained the most widely present and most recommended brand in the category.

Category Leader: Sleep Foundation

Sleep Foundation held the lead in valid recommendation coverage in October 2026 at 4.0%, up from 2.0% in September 2026 and down from 7.9% in July 2026. The lead position returned to Sleep Foundation in October 2026 after Sleepopolis held it in August 2026 and September 2026. Sleepopolis finished second at 3.7% in October 2026, up from 3.0% in September 2026, and its presence rate moved from 58.7% in July 2026 to 43.8% in October 2026.

Mattress Advisory, Mattress Clarity, Mattress Nerd, Sleep Advisor, and Sleepopolis were classified as stable in October 2026, with movements within normal month-to-month variation. Mattress Clarity moved from 1.0% in September 2026 to 2.6% in October 2026, Mattress Nerd moved from 1.3% to 2.2%, Sleep Advisor moved from 0.0% to 1.1%, and Sleepopolis moved from 3.0% to 3.7%. Each of these was a single-month move, not yet a trend. Mattress Advisory held at 0.0% valid recommendation coverage across all four months, with presence falling from 1.0% in July 2026 to 0.4% in October 2026.

Recommendation Placement Snapshot

Questions This Section Answers

• Why can two mattress brands with similar coverage show very different rank-one rates?
• Which brand held the highest top-three placement among the leading mattress brands in October 2026?

Coverage alone does not show how prominently a brand is recommended. Among the leading brands in October 2026, top-three and rank-one rates diverged from coverage levels.

Sleep Foundation held both the highest top-three rate and the highest rank-one rate among leaders in October 2026, at 3.3% and 1.5%, while Sleepopolis, at nearly the same coverage level of 3.7%, held a rank-one rate of 0.4%. Similar coverage levels can still hide very different first-position rates.

Buyer-Intent Distribution

Questions This Section Answers

• What kind of AI buyer questions do qualified mattress brand observations currently capture?
• Which buyer-intent classes are missing from the current public series?

All qualified observations in both months fell into the Brand Recommendation class.

The current public series measures brand-recommendation discovery and does not yet contain qualified observations in the pricing and value or multi-brand comparison classes.

Historical Measurement Record

Questions This Section Answers

• Which mattress brand led coverage in each month of the measurement record, and how did the leader coverage level change?
• Does the available four-month history support a leadership trend or only month-to-month shifts?

This is an evergreen benchmark URL. New measurements are added to the same report.

Four months of data show leadership changing hands, not a settled category leader.

Top 10 Cited Domains

Questions This Section Answers

• Which domains are cited most often across AI platform responses about mattress brands?
• How concentrated are AI citations among the top domains, and which tracked brand domains appear?

Across all AI platform responses in this measurement period, 7,539 citations were observed across 763 unique domains.

Citations are concentrated in a small group of domains, with the top 10 accounting for roughly 58% of all observed citations. Four tracked brands' own domains appear in the top 10: sleepfoundation.org at rank 2, mattressclarity.com at rank 4, sleepopolis.com at rank 5, and mattressnerd.com at rank 6. Publisher and review sources dominate the list, with a video platform at the top and a general news outlet at rank 10, while no government or official standards body appears in the top 10.

Evidence and Source Layer

The benchmark is built from prompt-level observations that retain the query, AI/search surface, answer, brand outcome, recommendation placement, sentiment, and where exposed, citations or attributable evidence sources. Source presence is evidence about the information environment. It is not automatically proof that the source caused the recommendation.

Scope Boundaries

This public benchmark does not measure:

• Market share or sales attribution
• Every possible AI response to a given query
• Organic-search ranking positions
• Social media mention volume
• Private or sponsored channels
• Causality from a metric movement alone

The benchmark cannot attribute a coverage change to any single cause.

About This Benchmark

The LLM Authority Index AI Visibility Market Discovery Index is a neutral, repeatable measurement of how brands appear and are recommended across major AI and search surfaces. It tracks presence, recommendation coverage, placement, and sentiment as distinct signals.

• AI Visibility Market Discovery Methodology
• AI Visibility Market Discovery Metric Definitions
• AI Visibility Market Discovery Research Standards
• Modeled AI Visibility Authority Value

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