AI Visibility Rankings · Healthcare

Clinical trial recruitment companies: AI search visibility ranking (2026)

How AI search engines rank clinical trial recruitment companies by visibility and citations. 20 brands measured monthly across Google AI Mode: which brands the AI names in answers, which domains it cites as sources, and how the leaders compare. Clinical trial recruitment companies helping sponsors identify, engage, pre-screen, and retain eligible participants for complex research studies. Composite score: 70% visibility (% of AI answers naming the brand) + 30% citation rate (% citing the brand's domain). Full methodology →

Refreshed Jul 03, 2026

Avg visibility across category

Avg citation rate

20/20

Brands successfully audited

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When AI engines like ChatGPT, Claude, and Perplexity answer questions about clinical trial recruitment companies, Antidote comes up most consistently, appearing in 87.5% of relevant AI citations across the engines tracked here. AutoCruitment and Trialfacts also appear regularly in AI-generated shortlists, making these three the names buyers will encounter most often when researching this category through AI tools.

The rankings reflect which sources AI engines treat as authoritative. The most cited domains include antidote.me, guides.clarahealth.com, clinicalconnection.com, wcgclinical.com, and researchandmarkets.com. Several of these are industry directories, clinical trial portals, and research aggregators rather than independent review platforms, which means AI visibility here is driven more by topical authority and domain credibility than by user-generated reviews or ratings.

For a buyer using this list, the key consideration is whether a brand has built third-party validation beyond its own website. Brands that appear in clinical research directories, earn mentions in credible healthcare guides, and maintain a presence on recognized trial portals tend to score higher with AI engines. If you are evaluating a company that ranks lower here, check whether it has recent coverage on recognized third-party sources, not just its own marketing content.

At a glance

Category leader Antidote 12% visibility · named in 1 of 8 AI answers

Most cited brand Antidote 88% citation rate · the AI's most-trusted source brand in clinical trial recruitment companies

Top cited domain antidote.me Referenced by AI across the clinical trial recruitment companies query set — the highest-leverage PR target in this category

Visibility spread 12pp Gap between top and bottom of the ranking · 15 brands at 0% (invisible to the AI)

What we observed in this categoryauto-generated

Antidote leads the clinical trial recruitment category by a wide margin, holding a composite score of 35.0 against a category average visibility of just 3.1%. Its citation rate of 87.5% is more than ten times the category average of 8.1%, meaning Google AI Mode not only mentions Antidote but actively relies on antidote.me as a source. The next closest brands, AutoCruitment and Trialfacts, score only 11.2 on composite, making the gap between first and second place the defining structural feature of this category.

A clear divergence exists between being named and being trusted as a source. PatientWing and StudyKIK each hold 12.5% visibility but carry 0% citation rates, meaning AI surfaces them in responses but does not link to their domains as reference material. AutoCruitment and Trialfacts show the opposite pattern: 0% visibility but 37.5% citation each, suggesting their content is used as background sourcing without the brands being explicitly recommended or named in AI outputs.

Google AI Mode is the top engine across every brand in this dataset, reflecting that this audit is concentrated on that single surface. Beyond direct brand domains, the cited sources list includes guides.clarahealth.com, clinicalconnection.com, wcgclinical.com, and researchandmarkets.com, indicating AI is anchoring on third-party guides, clinical directories, and market research publishers rather than relying solely on company-owned content. Trialfacts.me appears in both the cited sources list and the brand rankings, reinforcing its dual role as a brand and a reference document.

Movers & shakers since last refresh

Biggest visibility risers

PatientWing 0% → 12% · rank #11 → #4
+12pp
Trialbee 0% → 12% · rank #7 → #6
+12pp
MMG 0% → 12% · rank #10 → #7
+12pp

Biggest visibility fallers

Trialfacts 12% → 0% · rank #2 → #3
-12pp
BBK Worldwide 12% → 0% · rank #5 → #8
-12pp
Clariness 12% → 0% · rank #3 → #18
-12pp

The ranking

#	Brand	Visibility	Citation	Top engine
1	Antidote antidote.me	12%	88%	Google AI Mode
Antidote's composite score of 35.0 and citation rate of 87.5% place it more than three times above the next ranked brand on both measures.
2	AutoCruitment autocruitment.com	0%	38%	Google AI Mode
AutoCruitment holds a 37.5% citation rate but 0% visibility, meaning AI draws on its content as a source without naming it in direct responses.
3	Trialfacts trialfacts.com	0%	38%	Google AI Mode
Trialfacts matches AutoCruitment's citation rate of 37.5% and composite score of 11.2, but dropped from rank 2 after losing 12.5 visibility points this period.
4	PatientWing patientwing.com	12%	0%	Google AI Mode
PatientWing rose from rank 11 to rank 4 with a visibility delta of plus 12.5%, but its citation rate remains at 0%, signalling named presence without source authority.
5	StudyKIK studykik.com	12%	0%	Google AI Mode
StudyKIK shares PatientWing's composite score of 8.8 and identical 12.5% visibility and 0% citation profile, indicating no differentiation between the two in AI treatment.
6	Trialbee trialbee.com	12%	0%	Google AI Mode
7	MMG mmgconnect.com	12%	0%	Google AI Mode
8	BBK Worldwide bbkworldwide.com	0%	0%	Google AI Mode
9	Acurian acurian.com	0%	0%	Google AI Mode
10	Biorasi biorasi.com	0%	0%	Google AI Mode
11	CSSi cssienroll.com	0%	0%	Google AI Mode
12	Deep 6 AI deep6.ai	0%	0%	Google AI Mode
13	Pharmacy Times Clinical Forum pharmacytimes.org	0%	0%	Google AI Mode
14	HealthMatch healthmatch.io	0%	0%	Google AI Mode
15	IgniteData ignitedata.com	0%	0%	Google AI Mode
16	Innovo Research innovoresearch.com	0%	0%	Google AI Mode
17	Clinical Enrollment clinicalenrollment.com	0%	0%	Google AI Mode
18	Clariness clariness.com	0%	0%	Google AI Mode
19	SubjectWell subjectwell.com	0%	0%	Google AI Mode
20	M3 Wake Research m3wakeclinical.com	0%	0%	Google AI Mode

Sources AI engines trust in this category

Across the 8 buyer-intent queries we ran on clinical trial recruitment companies, these are the domains Google AI Mode cited most often. If you're not on this list — or if your competitors are — that's a concrete PR / linkbuilding target.

antidote.meguides.clarahealth.comclinicalconnection.comwcgclinical.comresearchandmarkets.comtrialfacts.compatiro.comsanogenetics.com

How to read this ranking

Four things worth knowing before you act on the numbers above. These are the same definitions across every industry page — for category-specific observations, see the What we observed section above (where available) and the per-brand insights inline in the ranking.

Visibility = being named

A brand's visibility % is the share of AI answers that mention it by name in the response prose. This is who AI engines actively recommend to the buyer. More on visibility →

Citation rate = being trusted

Citation rate is the share of AI answers that include the brand's domain as a clickable source link. This is what the AI treats as authoritative evidence, different from being named. More on citation rate →

Top engine differs by brand

The "top engine" column shows which AI surface each brand performs best on. Big gaps between a brand's score across engines usually points to specific content or schema gaps. How AI engines pick sources →

Rankings move month to month

AI engines re-crawl and re-rank on shorter cycles than classical search. We re-audit every brand on this list at least every 30 days and refresh this page automatically. How AI search ranking works →

Get your own clinical trial recruitment companies brand audited

The brands above were curated from public market-leader lists. Want the same measurement against your own brand — including the queries you appear on, which competitors get named instead, and a prioritised fix list? Run a free preview.

Audit your clinical trial recruitment companies brand → Browse all rankings Methodology →

Frequently asked about clinical trial recruitment companies AI visibility

Who leads AI visibility in clinical trial recruitment companies?

Antidote leads with a composite score of 35.0 and a citation rate of 87.5%, far ahead of the next ranked brands AutoCruitment and Trialfacts, which score 11.2 each.

What is the average visibility for clinical trial recruitment brands in Google AI Mode?

Average visibility across the 20 brands audited is 3.1%, and average citation rate is 8.1%, indicating that most brands in this category have minimal AI presence.

What sources does Google AI Mode cite most for clinical trial recruitment research?

The top cited sources include antidote.me, guides.clarahealth.com, clinicalconnection.com, wcgclinical.com, and researchandmarkets.com, showing reliance on a mix of brand-owned and third-party reference content.

Which brands are cited by AI but not visibly named in responses?

AutoCruitment and Trialfacts each carry a 37.5% citation rate but 0% visibility, meaning their content informs AI answers without those brands appearing as named recommendations.

Which brands gained the most AI visibility in the most recent period?

PatientWing, Trialbee, and MMG each gained 12.5 visibility points, with PatientWing making the largest rank jump, moving from position 11 to position 4.

Which brand experienced the sharpest overall decline in this category?

Clariness fell from rank 3 to rank 18, losing 12.5 points in both visibility and citation, making it the largest mover in the wrong direction across both metrics.