A small CRO does not need one big platform; it needs a system that spins up a study fast, keeps each sponsor's data cleanly separated, and does not demand an enterprise licence per engagement. Here is how to choose, and where Capture does and does not fit.
Free sandbox · No credit card · 21 CFR Part 11 aligned
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The short answer
The buying problem
A sponsor buys an EDC once for a program. A small CRO buys it for a stream of engagements: a three-site observational study this quarter, a decentralised feasibility cohort next, a sponsor who arrives with a protocol and a six-week deadline after that. The cost of a tool that takes three months to configure, or a licence priced for a single large pivotal trial, is paid again and again.
That changes the shortlist criteria. Time to a live study matters more than the length of the feature list. Per-study cost structure matters because margins on small studies are thin. The ability to show a sponsor a working build quickly, during a bid, can be the difference between winning and losing the work. And the system has to survive a sponsor audit, because even a small engagement is judged by the same standards as a large one. If you are weighing running a study without handing it to a large CRO, the same logic applies in reverse, covered in how to run a clinical trial without a CRO.
Selection criteria
Score each vendor on the same sheet and run the same test protocol through each one.
Time a real build of a recent protocol, from blank to approved forms, in each trial or sandbox.
Ask how studies, users and roles are isolated, and how a sponsor gets read-only access.
Audit trail, e-signatures, role-based access, form locking and edit checks, tested hands-on.
Check whether they are the same system and audit trail or separate products to integrate.
Ask when charges start, whether there is a fee per study, and what a pilot costs before go-live.
Ask for documentation that supports your own validation and sponsor audits.
Test exports, data dictionaries and what a sponsor receives at database lock.
Ask each vendor directly about drug supply, imaging, coding and safety database needs.
Comparison
These are neutral, category-level descriptions, not feature or pricing claims. Details change, so confirm everything with each vendor and in a hands-on trial.
| Option | Category | Often evaluated for | Verify in your evaluation |
|---|---|---|---|
| Capture | Self-serve, all-in-one clinical trial platform | Fast study start, EDC with ePRO, eConsent and randomization in one audit trail, free to build and pay when live | Fit for your protocol, drug supply and imaging needs; validation documentation for your sponsors |
| Castor | Commercial EDC and decentralised platform | Mid-market sponsors and CROs | Commercial terms, build effort, module scope. See Capture vs Castor |
| REDCap | Institution-hosted research data capture | Academic studies and teams with institutional support | Whether your institution hosts it for commercial work, and who owns validation. See Capture vs REDCap |
| Medrio | Commercial EDC for sponsors and CROs | Early-phase and small-to-mid-size trials | Commercial terms, build time and included modules. See Capture vs Medrio |
| Viedoc | Commercial clinical trial platform | Studies running across many countries | Commercial model, per-study set-up effort and module scope. See Capture vs Viedoc |
| OpenClinica | EDC with an open-source heritage | Teams wanting configurability and hosting choice | Hosting model, support level and who carries validation. See Capture vs OpenClinica |
No pricing or feature claims are made about any vendor other than Capture. Verify with each vendor.
Where Capture fits
Capture is a self-serve platform that combines EDC, an eCRF builder, ePRO, eConsent, randomization and safety reporting in one system with one audit trail. For a small CRO that means a new engagement can start in the free sandbox: build the study, draft forms from the sponsor's protocol with the AI study builder (a person reviews everything, nothing saves automatically), test edit checks and skip logic, and show the sponsor a working build before a contract is signed. You pay only when the study goes live with real participants.
The controls a sponsor audit looks for are in the platform: a field-level audit trail with timestamp, user, old value, new value and reason for change; electronic signatures; role-based access with PII segregation, so site coordinators see names and monitors see coded IDs; forms that move from draft to approved and lock for live use; edit checks that raise automatic queries; and per-field source data verification settings. Multi-site studies get QR-code enrolment, site-level participant numbering, a site coordinator portal and by-site exports. Query management and risk-based monitoring and SDV are covered in their own guides.
Exports are CSV or Excel with an automatic data dictionary, filterable by site and date range. Templates carry OIDs and SDTM domain labels for downstream use, but this is labelling, not a validated SDTM transformation, so plan your statistical programming accordingly. Our dedicated page on EDC for small and virtual CROs covers the CRO workflow in more detail, and EDC for CRO-independent trials looks at the sponsor side of the same relationship.
Honest limits
A fair comparison names the cases where you should pick something else. Capture is not the right choice if a study depends on complex depot-level IRT: multi-depot drug supply with cross-region resupply rules and heavy depot logistics belongs in a specialist randomization and trial supply system, even if Capture handles the randomization and kit dispensing that simpler studies need. It is also not designed to replace a core lab imaging pipeline where central reading, image transfer and adjudication are the main data flow, or a dedicated pharmacovigilance safety database with regulatory case submission. Capture captures adverse events on the eCRF with an SAE workflow, but a safety database is a separate category of system.
Two further limits are worth stating plainly. If your sponsor contractually mandates its own EDC, you will use theirs. And if you need a validated CDISC SDTM export from the system itself, check this against current documentation, because Capture labels templates with SDTM domains rather than claiming a validated transformation. None of this is specific to a phase: Capture is used for Phase 1, 2 and 3 studies. It is about the shape of the study, not its size or phase.
Build a real draft, test it with sample data, and show a sponsor the result. No credit card, no time limit, and nothing to pay until you go live.
How to run the evaluation
Keep it short and use the same protocol for every vendor.
Use a recent three- or four-site study with a safety form, a lab table and one patient-reported questionnaire.
Record how long it takes from blank to approved forms, including edit checks and visit schedule. Note what needed vendor help.
Change a value, then find the audit trail entry. Ask to see how roles restrict what a monitor and a site coordinator can see.
Put your drug supply, imaging, coding and sponsor-access requirements to each vendor in writing.
Ask for the commercial model in writing, including what happens before go-live and after database lock.
Related reading
If you are earlier in the process, best EDC software in 2026 covers the general market for any buyer, and EDC vs CTMS is worth reading if your CRO also needs study management. Teams moving from academic tooling should see how to migrate from REDCap, and anyone building a formal shortlist can use the EDC RFP template.
It depends on your studies, but the best fit for a small CRO usually has fast study start, per-study separation, built-in ePRO and eConsent, and a commercial model that does not charge enterprise rates for each engagement. Test your own protocol in each vendor's trial before deciding.
Yes. Each study is built and managed on its own, with its own forms, roles and audit trail. You can test the set-up for free in the sandbox.
Yes. Capture is suitable for Phase 1, 2 and 3 studies. Check specific needs such as multi-depot drug supply or imaging against your protocol.
When a study relies on complex depot-level IRT, a core lab imaging pipeline, or a dedicated pharmacovigilance safety database, or when the sponsor mandates its own EDC.
REDCap is institution-hosted, and the team using it owns validation. A CRO should confirm with the hosting institution whether commercial use is allowed and what validation documentation exists. See the REDCap comparison page for a fuller discussion.
Capture provides 21 CFR Part 11-aligned controls, including a field-level audit trail, electronic signatures and role-based access. Compliance is shared with the sponsor's own validated use of the system.
You can build and test free in the sandbox, with no credit card and no time limit. You pay only when a study goes live with real participants. Pricing is not published on the site, so ask for terms for your expected volume of studies.
Access is role-based, and exports can be filtered by site and date range. Confirm the exact access set-up your sponsor needs in a demo or the sandbox.
Keep exploring
Build one of your own protocols in the free sandbox. No credit card, pay only when live.