DNA Testing Kits: AI Market Discovery Index

Benchmark Summary

AncestryDNA led the DNA testing kits category in August 2026 with valid recommendation coverage of 72.3%, down from 76.9% in July 2026. The gap to the next brand, 23andMe, was 5.6 percentage points in August 2026, with 23andMe at 66.7% coverage. No brand recorded a significant increase in valid recommendation coverage this month; the closest secondary movement was FamilyTreeDNA's top-three placement rate, which rose from 24.6% in July 2026 to 26.7% in August 2026. The largest coverage decline was Living DNA, whose valid recommendation coverage fell from 21.6% in July 2026 to 14.8% in August 2026.

Movement this month was concentrated among decliners, with Living DNA and Nebula Genomics both registering coverage drops beyond normal month-to-month variation. Across the full two-month series, all ten tracked brands saw coverage decline from July to August 2026, though most moves were within normal variation. The benchmark began with 800 prompt-surface observations in each month and produced 594 qualified observations in July 2026 and 607 qualified observations in August 2026 after qualification.

Current Benchmark at a Glance

Qualified surface breadth is the number of canonical AI/search surface families with at least one qualified observation: ChatGPT, Copilot, Gemini, Perplexity, AI Overviews, and AI Mode. All six families were represented in both months.

Recommendation-shaped answer share fell from 42.9% in July 2026 to 36.1% in August 2026, while valid recommendation shortlist share fell from 76.3% to 69.5% over the same period.

For the strategic interpretation of this benchmark, read CiteWorks Studio's analysis of How AI Search Is Recommending DNA Testing Kits

Research Scope and Qualification

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. Link AI Market Discovery Methodology.

Current Brand Standings

How to Read the Standings

• Presence rate: Share of qualified observations in which the brand is mentioned in any form.
• Valid recommendation coverage: Share of qualified observations in which the brand receives a valid recommendation.
• Top-three rate: Share of qualified observations in which the brand appears among the top three recommended options.
• Rank-one rate: Share of qualified observations in which the brand is the first-listed recommendation.
• Net sentiment: Share of positive mentions minus negative mentions, scaled to mentions overall.

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

Recommendation Coverage Movement

Largest Decline: Living DNA

Living DNA's valid recommendation coverage fell from 21.6% in July 2026 to 14.8% in August 2026, a decline of 6.8 points beyond normal month-to-month variation. Top-three placement dropped from 4.5% to 1.1%, and rank-one placement fell from 0.7% to 0.0% over the same period. Presence rate declined from 28.3% to 23.9% in August 2026.

Largest Decline: Nebula Genomics

Nebula Genomics' valid recommendation coverage fell from 27.3% in July 2026 to 21.8% in August 2026, a decline of 5.5 points beyond normal month-to-month variation. The brand's presence rate declined from 30.3% to 26.0%, and its top-three placement rate fell from 9.8% to 7.1% in August 2026. Rank-one placement rose from 0.8% to 1.3% over the same period.

Category Leader: AncestryDNA

AncestryDNA remained the category leader for valid recommendation coverage in August 2026 at 72.3%, down from 76.9% in July 2026. The decline was within normal month-to-month variation. AncestryDNA's presence rate was 99.7% in August 2026, and its top-three placement rate fell from 75.1% to 68.9% over the period. Rank-one placement was 66.4% in August 2026, down from 69.9% in July 2026.

Recommendation Placement Snapshot

Coverage alone does not show how prominently a brand is recommended. AncestryDNA and 23andMe had high valid recommendation coverage in August 2026, but their first-position rates differ sharply.

Similar overall coverage can still hide very different first-position rates. AncestryDNA was the first-listed recommendation in 66.4% of qualified observations in August 2026, while 23andMe and MyHeritage DNA were first-listed in 1.5% and 0.7% respectively, despite both having coverage above 60%.

Buyer-Intent Distribution

All qualified observations in both months fell into the brand recommendation class, representing discovery and consideration intent.

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

Historical Measurement Record

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, attributable sales, every possible AI response, organic-search ranking, social mention volume, private or sponsored channels, or causality from a metric movement alone. The index records the change; it does not by itself establish why the change occurred.

About This Benchmark

The LLM Authority Index AI Market Discovery Index is a neutral industry benchmark tracking how AI search and chat surfaces present brands across categories. New measurements are added to this same report.

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

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The public industry benchmark shows category-level standings. A company-level Authority Index can go deeper. The public percentage cannot identify the prompts, competitors, or sources causing the result.

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