Small Study

Start for free!




125 inclusions
12 month duration
1 center
and all of our
standard features

Additional features & services

Not included


up to 3450
12 months

Package per year
Support per year
Support one-time
Currently free!
Start building! Contact us for a custom quote
  • Small studies, as indicated in the price calculator are free for non-profit organizations. There is a maximum of 5 free studies per academic institute.
  • Our commercial fee applies when the study Sponsor, as defined in the study protocol, is a commercial company, or the study itself is being carried out by a commercial organization.
  • Funded studies run by Clinical Trial Units, Clinical Research Facilities, Academic Research Organizations and similar organizations are priced separately, please contact us for details.
  • The above prices do not include custom contracting and/or extensive compliance validation.
  • Prices are exclusive of any applicable VAT.

Features overview

In-depth features page
Advanced form builder

Advanced form builder

eCRF construction

20+ field types

Data validation

Advanced calculations

Flexible forms

Testing environment

Data entry

Data entry

Automatic data saving

Real-time calculations

Edit checks

Electronic signing & locking

File attachments

Mobile app access

Security & Compliance

Security & Compliance

Good clinical practice

ISO27001 certified hosting

HIPAA compliant

FDA 21 CFR Part 11

Encrypted communication

2-Factor authentication

Data protection

Data protection


Frequent backups (4/day)

15 year data retention

99.98% uptime

Enforced strong passwords



Email support

Online manual

Video workshop


Calculation helper

Medically & technically educated

Device compatibility

Device compatibility

PC, Mac, Android, iOS

Optimized for tablets

RESTful API integration

HL7 FHIR importer

Manage study logistics with Ldot

Coding metadata

Statistics & overview

Statistics & overview

Study statistics

Field-based statistics

Record progress dashboards

Field comments

Audit trail

Accessible data

Accessible data


Printable eCRF

Import + Export data as CSV

Export structure as XML, Excel, SPSS

User management

User management

Centralized user management

Multicenter management

One account for all your studies

Role-based visit visibility

Unlimited users



Field stratification

Variable block sizes

5 block division types

Weighted groups

Double blinded randomization

ePRO (surveys)

ePRO (surveys)

Send/resend survey invitations

Immediate data saving

Schedule survey

Encrypted email addresses

Compile survey packages

Automated sending

SDV & Query management

SDV & Query management

Manual and automatic queries

Clear overview of (open) tasks

Source data verification

Unlimited verification types

Electronic signing

Clear inline symbols

Encryption module

Encryption module

Encrypt individual fields

Encrypt identifying information

Easily identify participants

Search through encrypted fields

Premium support

Premium support

Personal consultations

Study setup validation

Priority phone & email support

Central contracts for institutes

We allow institutes to centrally provide Castor to all their researchers through a site license. Besides happy researchers, this has countless additional benefits such as institute-wide compliance and data security. Save up to 60% with a Castor Package for your institute.

Institute benefits

Using affordability to disrupt the industry

Company mission: our goal is to make reliable and secure data capture available to all researchers, which starts by making Castor affordable
Efficiency: we leverage technology so we can efficiently build Castor with an efficient team of experts
Financial Support: we were awarded a €1.1M grant from the European Commission to further build great features into Castor while keeping its pricing low

Interested in Castor EDC?

Try out the calculator at the top of the page for an instant quote. If you have questions or are interested in a contract for your institute, please fill out the form below.