Evaluating clinical trial platforms? This guide compares Castor EDC and OpenClinica across cost, features, implementation, and total cost of ownership to help you choose the right platform for your study.
Before choosing “free” OpenClinica, it’s worth understanding what that actually costs. Server infrastructure, IT staff time, security, compliance, and validation documentation are real expenses that don’t appear on the licence invoice.
| Feature | Castor | OpenClinica |
|---|---|---|
| Best for | No in-house IT team; eCOA/eConsent needed; EU MDR/PMCF; decentralized trials | Strong IT team; zero budget; basic EDC only; self-hosted data sovereignty |
| Licence cost | Predictable flat-rate study licensing, no per-subject fees | Free (Community); commercial SaaS (Enterprise) |
| Hosting model | Cloud SaaS (managed) | Self-hosted (Community); cloud SaaS (Enterprise) |
| eCOA included | Yes, native | Yes (native ePRO/eCOA) |
| eConsent included | Yes, native | Yes (native eConsent) |
| RTSM | Yes, native randomization (trial supply via partner) | Yes (randomization + supply) |
| IT infrastructure required | None | Yes, self-hosted (Community); none (Enterprise) |
| Vendor support | Business-hours standard (24/7 for eCOA/enterprise) | Community forums (Community); support (Enterprise) |
| Validation documentation | Vendor-maintained | Institution responsibility |
| GDPR compliance | Vendor-managed | Institution responsibility (Community) |
| Implementation time | 3-4 wks low-complexity / standard, 4-8 managed (8-12 high), vs a 10-14 wk legacy average | Weeks to months |
| Feature | Castor | OpenClinica | Advantage |
|---|---|---|---|
| Cloud SaaS (managed hosting) | Yes | Enterprise only | Castor |
| No-code eCRF builder | Yes, native | Yes | Comparable |
| Native eCOA / ePRO | Yes, unified | Yes (native ePRO/eCOA) | Comparable |
| Native eConsent | Yes, unified | Yes | Comparable |
| RTSM | Native randomization (variable block, stratification, blinding controls). Trial supply / kit logistics via partner integration. | Yes | Comparable |
| RWE / registry support | Yes, native | Limited | Castor |
| EU MDR / PMCF support | Yes, native workflows | Not specifically built | Castor |
| IT infrastructure required | None | Yes (Community) | Castor |
| Vendor-maintained validation docs | Yes, included | No, institution responsibility | Castor |
| Vendor support included | Business-hours standard (24/7 for eCOA/enterprise) | No (Community) | Castor |
| GDPR compliance (vendor-managed) | Yes, included | Institution responsibility | Castor |
| DCT / remote trial support | Yes, native | Limited | Castor |
Castor EDC is a unified, cloud-native clinical research platform developed in Amsterdam and deployed globally in 160+ countries (cumulative, to date). It combines EDC, eCOA, eConsent, native randomization, and real-world evidence capabilities in a single integrated system.
OpenClinica is an open-source clinical trial management system available in two editions: OpenClinica Community (free, open-source) and OpenClinica Enterprise (commercial SaaS). The Community Edition has a strong user base in academic institutions and public health organisations worldwide.
Many universities and research institutions have institutional agreements or access to Castor pricing that makes per-study costs highly competitive with self-hosting OpenClinica. Before defaulting to “free” OpenClinica, check if your institution has a standing agreement or can negotiate one. The vendor-managed validation documentation, GDPR compliance, and 24/7 support often justify the cost.
OpenClinica Community Edition has no software licence fee. However, you must self-host it, which requires server infrastructure, database administration, IT security management, and GDPR compliance tooling. The total cost of ownership is rarely zero. OpenClinica Enterprise Edition is commercial SaaS with support and hosting fees.
Castor has a per-study subscription cost, while OpenClinica Community Edition has no software licence fee. However, when IT overhead (infrastructure, staff time, security, compliance) is included, Castor’s all-in cost is often lower or comparable. For teams without IT resources, Castor’s transparent per-study pricing is typically more cost-effective.
Both are used in IIT settings. Castor is preferred by IITs with limited IT resources, as it eliminates infrastructure burden and includes 24/7 support. OpenClinica is preferred by IITs at large academic institutions with in-house IT teams and minimal budget. Many academic centres report Castor’s pricing (especially with institutional agreements) is competitive with self-hosting OpenClinica.
Yes, OpenClinica (both Community and Enterprise) supports 21 CFR Part 11 compliance. However, for Community Edition, the institution is responsible for generating and maintaining validation documentation. With Enterprise Edition, OpenClinica provides greater support, but the responsibility for regulatory compliance still largely falls on the sponsor.