DNA Testing Kits: AI Visibility Market Discovery Index

Benchmark Summary

Questions This Section Answers

• Which DNA testing brand leads the category for valid recommendation coverage in October 2026?
• Did any brand post a meaningful month-over-month change in recommendation coverage this month?

AncestryDNA remained the category leader for valid recommendation coverage in October 2026 at 73.2%, ahead of second-place 23andMe at 67.3%, a gap of 5.9 percentage points. No brand recorded a significant increase in valid recommendation coverage this month, and no brand posted a month-over-month move beyond normal variation in the primary metric, so October 2026 was a quiet month at the category level.

No brand recorded a significant increase in valid recommendation coverage since the July 2026 baseline; all ten tracked brands sit at or below their July 2026 levels in October 2026. The largest decline across the series belongs to Nebula Genomics, which fell from 27.3% in July 2026 to 16.5% in October 2026, down 10.8 points and beyond normal variation, declining in each of the three months since July 2026. FamilyTreeDNA fell from 64.1% to 57.7% (down 6.4 points), tellmeGen fell from 2.5% to 0.5% (down 2.0 points), and Health Nucleus fell from 0.8% to 0.0% (down 0.8 points), each beyond normal variation. Measured month over month, the closest brand to a reversal was 23andMe, which rose 2.2 points from 65.1% in September 2026 to 67.3% in October 2026 after two consecutive monthly declines, though the move remains within normal variation.

The benchmark began with 800 prompt-surface observations in each month and produced 563 qualified observations in October 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 in the month: 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 DNA Testing Kits

Research Scope and Qualification

Questions This Section Answers

• How many raw prompt-surface observations became qualified benchmark observations?
• Why is the public benchmark narrower than the raw collection universe?

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 DNA testing brands have the strongest recommendation coverage and top-three placement?
• How do presence rate and valid recommendation coverage differ across the ten tracked brands?

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 Visibility Market Discovery Metric Definitions.

Recommendation Coverage Movement

Questions This Section Answers

• Which brands saw the largest declines in valid recommendation coverage since the July 2026 baseline?
• Did any brand move beyond normal month-to-month variation between September and October 2026?

From the prior month, 23andMe rose 2.2 points from 65.1% in September 2026 to 67.3% in October 2026, Living DNA rose 0.9 points from 16.3% to 17.2%, and Nebula Genomics declined 3.5 points from 20.0% to 16.5%, each within normal month-to-month variation. Every brand in the table sits below its July 2026 baseline.

Largest Decline: Nebula Genomics

Nebula Genomics' valid recommendation coverage fell from 27.3% in July 2026 to 16.5% in October 2026, a decline of 10.8 points beyond normal variation, and the brand declined in each of the three months since July 2026. Presence rate fell from 30.3% in July 2026 to 22.4% in October 2026, down 7.9 points, also beyond normal variation. Top-three placement fell from 9.8% to 7.1% over the same period. Rank-one placement rose from 0.8% to 1.2%.

Significant Declines Beyond Normal Variation

FamilyTreeDNA's valid recommendation coverage fell from 64.1% in July 2026 to 57.7% in October 2026, down 6.4 points beyond normal variation, with a 1.1-point decline from September 2026 to October 2026. Presence rate fell from 80.0% to 75.7%, while top-three placement rose from 24.6% to 25.4% over the same period.

tellmeGen's valid recommendation coverage fell from 2.5% in July 2026 to 0.5% in October 2026, down 2.0 points beyond normal variation. Presence rate fell from 4.4% to 2.1%, and top-three placement fell from 0.7% to 0.4%.

Health Nucleus' valid recommendation coverage fell from 0.8% in July 2026 to 0.0% in October 2026, down 0.8 points beyond normal variation, and the brand declined in each of the three months since July 2026. Presence rate fell from 0.8% to 0.0% over the same period.

Category Leader: AncestryDNA

AncestryDNA remained the category leader for valid recommendation coverage in October 2026 at 73.2%, down 3.7 points from 76.9% in July 2026, a difference within normal variation. Presence rate was 99.6% in October 2026. Top-three placement was 73.0% in October 2026, down from 75.1% in July 2026, and rank-one placement was 69.6% in October 2026, down from 69.9% in July 2026.

Stable Brands

23andMe, African Ancestry, AncestryDNA, CRI Genetics, Living DNA, and MyHeritage DNA each moved within normal variation across the series. Among them, MyHeritage DNA's top-three placement rose from 43.9% in July 2026 to 49.7% in October 2026, up 5.8 points, even as its valid recommendation coverage slipped 2.3 points over the same period. A rising top-three rate did not translate into stronger recommendation coverage.

Recommendation Placement Snapshot

Questions This Section Answers

• Why do brands with similar recommendation coverage have very different rank-one rates?
• How often was AncestryDNA the first-listed recommendation compared with 23andMe and MyHeritage DNA?

Coverage alone does not show how prominently a brand is recommended. AncestryDNA and 23andMe carried similar overall coverage in October 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 69.6% of qualified observations in October 2026, while 23andMe and MyHeritage DNA were first-listed in 1.6% and 0.9% respectively, despite both carrying coverage above 59%. The gap between coverage and rank-one strength is the defining competitive distinction in the category.

Buyer-Intent Distribution

Questions This Section Answers

• What kind of buyer intent do the qualified observations represent?
• Are pricing and value or multi-brand comparison questions represented in the current benchmark?

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

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. Pricing, value, and head-to-head comparison questions therefore have no public signal in this data.

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, not 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.

Top 10 Cited Domains

Questions This Section Answers

• Which domains are cited most often across AI platform responses in October 2026?
• How concentrated are citations among the top domains versus the rest of the citation universe?

Across all AI platform responses in the October 2026 measurement period, 6,687 citations were observed across 686 unique domains.

Citations are broadly distributed rather than concentrated: the ten most-cited domains account for well under half of all citations, and the remaining 676 domains carry the majority. The domain of one tracked brand, AncestryDNA, appears in the top 10 at rank four, drawing citations across five canonical surface families. Review, guide, and community sources dominate the list, with video and forum platforms at the top.

About This Benchmark

The LLM Authority Index AI Visibility 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 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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