A unified, cloud-native platform for electronic data capture, eCOA, eConsent, and real-world evidence. Trusted by research teams in 171 countries since 2012.
Castor provides a unified clinical trial platform that replaces disconnected point solutions for sponsors, investigators, and research sites. The platform is built on cloud-native SaaS architecture, meaning it runs entirely on the web with no local installation, automatic updates, and the ability to scale across global research programmes of any size.
Before Castor, research teams typically managed separate systems for data capture, patient consent, outcome collection, and evidence analysis. Castor integrates all of these into a single connected system, reducing the need to move data between platforms and giving study teams a unified view of every participant and every data point in a trial.
Castor runs entirely via web browser. Research teams access it from any device in any country without installing software, managing servers, or waiting for IT provisioning.
The same platform supports Phase I through Phase IV sponsored trials, investigator-initiated research, observational studies, PMCF studies, and patient registries.
Castor is validated for FDA 21 CFR Part 11, ISO 27001 certified, GDPR-compliant, and built to meet ICH E6(R3) GCP requirements across all jurisdictions where clinical research is conducted.
Founded by Derk Arts MD PhD in 2012, Castor was designed from the start by someone who had run clinical trials and experienced the inefficiencies of legacy data systems firsthand.
Five core modules. All directly integrated. Each purpose-built for a distinct function in the clinical trial lifecycle.
A configurable electronic data capture system for building and managing eCRFs across Phase I through Phase IV clinical trials. Includes automated validation rules, audit trails, user access controls, and regulatory compliance reporting.
Electronic clinical outcomes assessment covering ePRO, eClinRO, and eObsRO. Participants complete assessments via mobile app or web portal. Supports bring-your-own-device (BYOD) and provisioned device models, enabling decentralized clinical trials without dedicated site hardware. Fully integrated with the core eCOA platform.
Digital informed consent workflows with complete audit trails, multi-language consent documents, and tiered re-consent capabilities. Participants can review, sign, and re-consent remotely or in-person. Directly integrated with the core Castor platform for participant-level tracking across the study lifecycle.
AI-assisted EMR data extraction that accelerates chart review and source data verification. Castor Catalyst identifies and extracts relevant data from electronic medical records. All extracted data is subject to human review before it enters the study database, maintaining GCP compliance and data integrity.
A streamlined clinical trial management solution designed for lean research teams, investigator-initiated studies, and smaller-scale research programmes. Delivers core EDC and study management capabilities in an accessible package for teams with tighter timelines and leaner budgets.
Castor has powered clinical research at scale since 2012, building one of the most widely used validated datasets in clinical trial technology.
Castor serves four primary segments. Each brings different research goals, regulatory requirements, and operational needs to the platform.
Sponsors running Phase I through Phase IV trials use Castor to manage electronic data capture, patient outcomes, and regulatory submissions. Castor supports biotech clinical trials across early-stage and late-stage programmes.
Device companies conducting EU MDR post-market clinical follow-up (PMCF) studies and pre-market clinical investigations rely on Castor for structured data collection, audit trails, and regulatory reporting.
CROs managing multi-sponsor clinical portfolios use Castor to standardise data collection workflows, reduce site training time, and deliver consistent data quality to sponsor clients across therapeutic areas and geographies.
A streamlined clinical trial management solution designed for lean research teams, investigator-initiated studies, and smaller-scale research programmes. Delivers core EDC and study management capabilities in an accessible package for teams with tighter timelines and leaner budgets.
Castor is designed and validated to meet international regulatory standards across FDA, EMA, PMDA, and ANVISA jurisdictions. The platform undergoes regular security audits, validation testing, and compliance assessments.
| Standard or regulation | Scope |
|---|---|
| FDA 21 CFR Part 11 | Electronic records and electronic signatures for US-regulated trials |
| ICH E6(R3) GCP | Good Clinical Practice guidelines for sponsor and investigator responsibilities (finalized January 2025) |
| EU GDPR | Data protection and privacy for European research participants |
| EU MDR 2017/745 | Medical device post-market clinical follow-up (PMCF) study requirements |
| ISO 27001 | Information security management system certification |
| EU Annex 11 | Computerised systems validation standards for GMP and clinical trial software |
Castor has been recognised across peer review platforms and analyst reports for product quality, ease of use, and customer support.
Leader, Clinical Trial Management Software
Best Value, Electronic Data Capture
Clinical Trial Technology Solutions
92% annual customer retention
Castor is a clinical research software company founded in Amsterdam in 2012. The company provides a unified, cloud-native platform for electronic data capture (EDC), electronic clinical outcomes assessment (eCOA), electronic informed consent (eConsent), and real-world evidence (RWE) collection. Castor supports pharmaceutical companies, biotech firms, contract research organisations, academic medical centres, and medical device manufacturers conducting clinical trials across 171 countries.
Castor was founded in 2012 by Derk Arts MD PhD, a physician-researcher based in Amsterdam. Arts founded the company to address inefficiencies in clinical data collection, bringing a clinical perspective to the design of the platform from the ground up.
Castor has supported more than 31,900 clinical studies involving over 9.5 million participants across 70,000 investigator sites in 171 countries. The platform has processed more than 830 million data points across sponsored trials, investigator-initiated research, and academic studies.
Yes. Castor is validated for FDA 21 CFR Part 11 (electronic records and signatures), GDPR-compliant for European data protection requirements, ISO 27001 certified for information security, and compliant with ICH E6(R3) Good Clinical Practice guidelines, EU Annex 11 computerised systems validation standards, and EU MDR 2017/745 requirements for PMCF studies.
Castor offers five core products: Castor EDC (electronic data capture for clinical trials), Castor eCOA (electronic clinical outcomes assessment and ePRO), Castor eConsent (electronic informed consent), Castor Catalyst (AI-assisted EMR data extraction for chart review with human oversight), and Castor Essentials (streamlined trial management for smaller studies). All five products are directly integrated within the unified Castor platform.
