Clinical trial management systems: AI search visibility ranking (2026)
How AI search engines rank clinical trial management systems 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 management systems used by sponsors, CROs, and research sites to manage studies, subjects, milestones, finances, documents, and regulatory workflows. Composite score: 70% visibility (% of AI answers naming the brand) + 30% citation rate (% citing the brand's domain). Full methodology →
Refreshed Jun 16, 2026Download this ranking as a PDF
We'll email it to you. One-off send — no list, no follow-up, no surprise marketing.
At a glance
What we observed in this categoryauto-generated
OpenClinica leads the clinical trial management systems category with a visibility score of 25.0%, more than double the 12.5% held by Medidata and Veeva Vault CTMS. This gap is significant because OpenClinica's composite score of 17.5 sits well above the category average visibility of 3.1%, suggesting Google AI Mode is anchoring on it as a default reference point for the category. The lead is recent, with OpenClinica rising from rank 8 to rank 1 and moving from 0% to 25% visibility in a single period.
A clear divergence exists between being named and being cited. OpenClinica holds 25% visibility but 0% citation, while SimpleTrials shows the inverse, with 0% visibility and 37.5% citation, the highest citation rate in the dataset. Advarra follows a similar pattern at 0% visibility and 25% citation. This means AI responses mention OpenClinica frequently in text but link to SimpleTrials and Advarra as source documents, separating brand mentions from trusted reference status.
The top cited sources in this category include third-party review and community platforms such as g2.com, reddit.com, and gartner.com alongside vendor domains like simpletrials.com, advarra.com, and veeva.com. Google AI Mode appears to be drawing heavily on peer review and forum content rather than purely vendor or clinical literature. Oracle Clinical One and IQVIA both score 0% on visibility and citation despite being established market names, indicating AI Mode is not currently treating them as authoritative sources.
Movers & shakers since last refresh
Biggest visibility risers
-
OpenClinica 0% → 25% · rank #8 → #1+25pp
-
Castor 0% → 12% · rank #19 → #5+12pp
The ranking
| # | Brand | Visibility | Citation | Top engine |
|---|---|---|---|---|
| 1 |
openclinica.com
|
25% | 0% | Google AI Mode |
OpenClinica leads with 25% visibility, eight times the 3.1% category average, but its 0% citation rate means AI names it without linking to it as a source. |
||||
| 2 |
medidata.com
|
12% | 12% | Google AI Mode |
Medidata sits at 12.5% on both visibility and citation, making it the most balanced performer in the top five and the only brand matching both metrics equally. |
||||
| 3 |
veeva.com
|
12% | 12% | Google AI Mode |
Veeva Vault CTMS mirrors Medidata exactly at 12.5% visibility and 12.5% citation, sharing the same composite score of 12.5 and the same top engine, Google AI Mode. |
||||
| 4 |
simpletrials.com
|
0% | 38% | Google AI Mode |
SimpleTrials holds the highest citation rate in the dataset at 37.5% despite 0% visibility, meaning AI cites its domain as a source without naming it in generated text. |
||||
| 5 |
castoredc.com
|
12% | 0% | Google AI Mode |
Castor rose 14 places to rank 5 with a 12.5% visibility gain from zero, but retains 0% citation, placing it alongside OpenClinica in the named-but-not-cited group. |
||||
| 6 |
advarra.com
|
0% | 25% | Google AI Mode |
| 7 |
oracle.com
|
0% | 0% | Google AI Mode |
| 8 |
iqvia.com
|
0% | 0% | Google AI Mode |
| 9 |
florencehc.com
|
0% | 0% | Google AI Mode |
| 10 |
clinion.com
|
0% | 0% | Google AI Mode |
| 11 |
trialkit.com
|
0% | 0% | Google AI Mode |
| 12 |
realtime-ctms.com
|
0% | 0% | Google AI Mode |
| 13 |
bio-optronics.com
|
0% | 0% | Google AI Mode |
| 14 |
bio-optronics.com
|
0% | 0% | Google AI Mode |
| 15 |
edgecro.com
|
0% | 0% | Google AI Mode |
| 16 |
transperfect.com
|
0% | 0% | Google AI Mode |
| 17 |
ennov.com
|
0% | 0% | Google AI Mode |
| 18 |
anjusoftware.com
|
0% | 0% | Google AI Mode |
| 19 |
datatrak.com
|
0% | 0% | Google AI Mode |
| 20 |
mastercontrol.com
|
0% | 0% | Google AI Mode |
Sources AI engines trust in this category
Across the 8 buyer-intent queries we ran on clinical trial management systems, 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.
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.
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.
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.
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.
Get your own clinical trial management systems 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.
Frequently asked about clinical trial management systems AI visibility
Who leads AI visibility in clinical trial management systems?
OpenClinica leads with 25% visibility, more than double its nearest competitors Medidata and Veeva Vault CTMS, both at 12.5%. It moved from rank 8 to rank 1 in the most recent period.
Which brand has the highest citation rate in this category?
SimpleTrials has the highest citation rate at 37.5%, despite having 0% visibility, meaning Google AI Mode links to its domain as a source but does not name it in generated responses.
What sources does Google AI Mode cite most for clinical trial management systems research?
The top cited sources include g2.com, reddit.com, gartner.com, simpletrials.com, advarra.com, veeva.com, curebase.ai, and avslifesciences.com, combining review platforms, community forums, and vendor sites.
Are major enterprise vendors like Oracle and IQVIA visible in AI responses for this category?
No. Oracle Clinical One and IQVIA both score 0% on visibility and 0% on citation in the current data, indicating Google AI Mode is not drawing on them as named brands or cited sources.
Which brands saw the biggest visibility gains in the latest period?
OpenClinica gained 25 percentage points in visibility, rising from rank 8 to rank 1, and Castor gained 12.5 percentage points, rising from rank 19 to rank 5.
Is there a consistent gap between brand visibility and citation rate in this category?
Yes. OpenClinica and Castor have high visibility but 0% citation, while SimpleTrials and Advarra have 0% visibility but citation rates of 37.5% and 25% respectively, showing AI mentions and AI citations do not align for most brands.