The Castor platform drives 95% patient compliance by seamlessly integrating electronic clinical outcome assessments and patient-reported outcomes with Enrollment, eConsent, Payments, and EDC. With 182M+ datapoints secured, validated instrument libraries, and global 24/7 support, you get an eCOA solution built for data integrity and patient engagement.”
Not all ePRO solutions are equal. Traditional clinical outcome assessment systems burden sites and frustrate patients.
Login experience and engagement
One-time passcodes + SMS/WhatsApp/email reminders on preferred channels
Complex passwords + limited communication options
Training and patient management
Minimal training, 24/7 patient support, site friendly tablet mode, BYOD and SSO – Castor handles patients for sites
High training burden, sites handle all patient issues and device management
Time from kickoff to first patient
✓ Castor
3-12 weeks with BYOD support – no device shipment delays
12-16 weeks plus device provisioning and shipping delays
How ePRO connects with other systems
Native unified platform – ePRO, EDC, eConsent, and payments in one system
Disconnected eCOA point solution requiring manual data reconciliation
Adaptive questionnaires and logic
Custom triggers, branching logic, and adaptive questionnaires based on patient responses
Rigid, linear workflows with no conditional logic or adaptability
Data availability and access
eCOA data stored in real-time and retrieved through API
✗ Traditional
Siloed eCOA data waiting weeks for an export
From rare disease natural history to oncology clinical trials, our eCOA platform adapts to your therapeutic area’s unique requirements
200+ studies powered by pre-built templates (EORTC QLQ-C30, FACT-G), real-time AE safety notifications, and integrated MedDRA/WHODrug coding.
150+ studies using event-driven scheduling for PHQ-9 & HAM-D, with dynamic diary triggers based on patient input and real-time alerts for missed entries.
30+ studies supported with low-burden protocols featuring integrated Televisits, remote eConsent with Legally Authorized Representative (LAR) workflows, and a BYOD-first approach to reduce travel.
Direct device integration via open API captures real-time wearable data, with large file upload support (up to 2GB) for storing crucial medical imaging alongside the patient record.
Join 6,100+ successful eCOA clinical trials powered by Castor’s expert team and integrated platform
See how Castor fits your budget with custom pricing for your study size
See how leading sponsors use Castor’s eCOA solutions and ePRO software to accelerate timelines and achieve 95% patient compliance.
Deploy in 4-8 weeks with pre-validated instruments and streamlined workflows
12-16 weeks of delays with manual processes and vendor coordination
No passwords (OTP), SMS/WhatsApp reminders, BYOD support, offline support, 92%+ compliance
Complex passwords, limited channels, device hassles, internet required, poor compliance
24/7 patient support, real-time monitoring, 40% fewer follow-ups needed
Sites handle all support, manual tracking, constant patient issues
Single login for EDC + eCOA + eConsent, real-time data flow
Disconnected systems, manual reconciliation, delayed insights
Custom triggers, branching logic, offline mode, protocol amendments in days
Linear workflows, no adaptability, amendments take months
Real-time data sync, instant integrations, live dashboards
Batch processing, CSV downloads, no real-time visibility
PRO instrument licensing included in package with existing relationships
Customer must handle separate vendor negotiations and licensing fees
Staff across timezones with 4 server regions for optimized performance
Business hours only, single region, language limitations
Our experts handle the tech so you can focus on the research
Strong relationships with copyright holders to secure agreements. Expert coordination of language reviews and scale adaptations.
Validated linguistic adaptations across 80+ languages. Vast network of translation vendors ensuring scientific validity.
24/7 multilingual helpdesk with global toll-free numbers. Includes device provisioning management when needed. Average response times under 1 hour with real-time issue escalation.
Library of pre-built eCOA instruments for Oncology, Cardiology, and other therapeutic areas. Quick deployment with proven quality.
Seamless integration with your existing systems. Export to any format, connect via API, or use our direct integrations.
CDISC SDTM/ADaM
RESTful API
SAS/CSV/Excel
Real-time Sync
Learn best practices for implementing eCOA in your clinical trials
eCOA is the digital capture of clinical outcome data—patient, clinician, or observer-reported—on secure devices. ePRO is a subset focused solely on data patients enter themselves. In short, every ePRO is an eCOA, but eCOA also covers ClinRO, ObsRO, and performance assessments.
Castor Catalyst is a fully validated, 21 CFR Part 11 and GxP compliant platform. We ensure compliance with the FDA 2024 RWD guidance by maintaining complete traceability to source documents (native PDFs/imaging via HIPAA access) and providing a comprehensive audit trail.
Yes. Participants can use their own smartphones via web or the Castor Connect app, while sponsors may still provision tablets or phones when required—giving you ultimate flexibility.
Which regulations and standards does Castor comply with?
You can build surveys in any language, and the participant interface toggles between more than 10 pre-translated UI languages out of the box, with 80+ additional languages supported via translation services.
Real-time dashboards, automated reminders, and intuitive design drive 95%+ diary completion, helping you minimize missing data and protocol deviations.
Yes. An open, API-first architecture streams eCOA data directly into external systems in real time, eliminating manual exports.
Yes. Our services team can secure instrument licenses, coordinate forward/back translations, and deliver fully validated eDiaries so you can focus on the science.
The public status page shows historical uptime exceeding 99.9%, and you receive 24/7 multilingual support for both sites and participants.
