Electronic data capture software: AI search visibility ranking (2026)
How AI search engines rank electronic data capture software 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. Electronic data capture platforms used to collect clinical trial data, manage case report forms, support study operations, and improve compliance in regulated research. Composite score: 70% visibility (% of AI answers naming the brand) + 30% citation rate (% citing the brand's domain). Full methodology →
Refreshed Jun 15, 2026Download this ranking as a PDF
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At a glance
What we observed in this categoryauto-generated
Medidata Rave holds rank 1 with a composite score of 12.5, the only brand in the top 10 to record any visibility at all (12.5%), against a category average of just 0.6%. That gap is significant because 18 of 20 brands register zero visibility, meaning the AI narrative in this category is almost entirely monopolised by a single brand. Medidata Rave is also the only brand that has moved, rising from zero visibility in the prior period with a delta of 12.5 on both visibility and citation.
Castor EDC presents the clearest divergence between visibility and citation in this dataset. It holds a citation rate of 37.5%, the highest of any brand, yet records 0.0% visibility, placing it second overall on composite score (11.2) without ever being named in AI-generated summaries. Clinion shows the same pattern with 25.0% citation and zero visibility. This means Google AI Mode is drawing on these brands as sources while omitting them from direct brand mentions in responses.
Google AI Mode is the top engine for every brand in this dataset, confirming the audit is effectively single-engine. The top cited sources list includes youtube.com and reddit.com alongside brand domains such as castoredc.com, clinion.com, and medidata.com, suggesting the AI is anchoring on a mix of user-generated content and vendor-owned pages rather than independent review platforms. Notably, viedoc.com and teamscopeapp.com appear in the cited sources list despite neither brand appearing in the top 10 ranked brands.
Movers & shakers since last refresh
Biggest visibility risers
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Medidata Rave 0% → 12% · rank #0 → #1+12pp
The ranking
| # | Brand | Visibility | Citation | Top engine |
|---|---|---|---|---|
| 1 |
medidata.com
|
12% | 12% | Google AI Mode |
Medidata Rave is the sole brand with positive visibility (12.5%), matching the category average citation rate of 5.0% by a factor of 2.5 and recording the only rank change in the dataset. |
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| 2 |
castoredc.com
|
0% | 38% | Google AI Mode |
Castor EDC achieves a category-leading citation rate of 37.5% despite 0.0% visibility, making it the most-cited but never-named brand across all AI responses audited. |
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| 3 |
clinion.com
|
0% | 25% | Google AI Mode |
Clinion records 25.0% citation with zero visibility, placing it third overall on composite score (7.5) and second in citation, entirely through source references rather than direct brand mentions. |
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| 4 |
medrio.com
|
0% | 12% | Google AI Mode |
Medrio sits joint fourth with ClinCapture, both scoring a composite of 3.8 on the back of a 12.5% citation rate and no visibility whatsoever in AI-generated responses. |
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| 5 |
clincapture.com
|
0% | 12% | Google AI Mode |
ClinCapture mirrors Medrio exactly with 12.5% citation and 0.0% visibility, and its domain (clincapture.com) appears in the top cited sources list, confirming AI referencing without brand naming. |
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| 6 |
veeva.com
|
0% | 0% | Google AI Mode |
| 7 |
oracle.com
|
0% | 0% | Google AI Mode |
| 8 |
projectredcap.org
|
0% | 0% | Google AI Mode |
| 9 |
openclinica.com
|
0% | 0% | Google AI Mode |
| 10 |
trialkit.com
|
0% | 0% | Google AI Mode |
| 11 |
eclinicalsol.com
|
0% | 0% | Google AI Mode |
| 12 |
ennov.com
|
0% | 0% | Google AI Mode |
| 13 |
merative.com
|
0% | 0% | Google AI Mode |
| 14 |
mastercontrol.com
|
0% | 0% | Google AI Mode |
| 15 |
datatrak.com
|
0% | 0% | Google AI Mode |
| 16 |
anjusoftware.com
|
0% | 0% | Google AI Mode |
| 17 |
datafax.com
|
0% | 0% | Google AI Mode |
| 18 |
mainedc.com
|
0% | 0% | Google AI Mode |
| 19 |
preludeedc.com
|
0% | 0% | Google AI Mode |
| 20 |
realtime-ctms.com
|
0% | 0% | Google AI Mode |
Sources AI engines trust in this category
Across the 8 buyer-intent queries we ran on electronic data capture software, 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 electronic data capture software 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 electronic data capture software AI visibility
Who leads AI visibility in electronic data capture software?
Medidata Rave leads with a visibility score of 12.5% and a composite score of 12.5, making it the only brand in the top 10 to register any AI-generated brand mentions at all.
Which EDC brand is cited most often by Google AI Mode even though it is not named in responses?
Castor EDC holds the highest citation rate in the category at 37.5% while recording zero visibility, meaning Google AI Mode references its content without including the brand name in summaries.
What sources does Google AI Mode anchor on for electronic data capture software research?
The top cited sources include youtube.com, reddit.com, and vendor domains such as castoredc.com, clinion.com, medidata.com, and clincapture.com, indicating a mix of user-generated and vendor-owned content.
How concentrated is AI visibility in this category?
Visibility is highly concentrated: the category average is just 0.6%, and only Medidata Rave records a non-zero visibility figure, leaving 19 of 20 brands with no named presence in AI responses.
Do large enterprise EDC vendors like Veeva and Oracle perform well in AI visibility?
No. Both Veeva Vault EDC and Oracle Clinical One record 0.0% on visibility, citation, and composite score, placing them below smaller specialists such as Castor EDC and Clinion.
Which brands appear in the cited sources list but are absent from the top 10 ranked brands?
Viedoc (viedoc.com) and Teamscope (teamscopeapp.com) both appear in the top cited sources for the category despite neither brand ranking in the top 10, suggesting latent citation presence without composite score recognition.