Why 18,000+ Studies Run on Castor

Verified reviews from independent platforms. Real outcomes from real studies. Honest head-to-head comparisons with the platforms you’re evaluating.

Studies on Platform
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Studies Live in <4 Weeks
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Countries
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Patients Enrolled
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How we compare

Independent comparisons across every product category

Honest, category-level comparisons to help you evaluate the clinical trial software market.

How Castor Catalyst compares to other real-world evidence and registry data platforms.

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A feature-by-feature overview of leading EDC platforms including Medidata, Veeva, Viedoc, and more.

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How Castor’s integrated eCOA and ePRO compares to standalone patient-reported outcome platforms.

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Comparing electronic consent platforms across compliance, patient experience, and integration requirements.

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Castor vs. the competition

See how Castor stacks up head-to-head

Detailed feature-by-feature comparisons with the platforms clinical teams most often evaluate alongside Castor.

Head-to-head

Unified EDC + eCOA platform vs. DCT specialist. Compare integrations, cost, and deployment speed.

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Head-to-head

Integrated EDC + eCOA vs. standalone ePRO and patient engagement tools.

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Head-to-head

Enterprise power without the 12-week deployment cycle. Fast, transparent SaaS vs. legacy EDC. 90% of Castor studies go live in under 4 weeks.

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Head-to-head

Commercial SaaS with full support vs. open-source EDC. Compare feature sets, compliance, and total cost of ownership.

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Head-to-head

Why wait 12 weeks when you can launch in 4? Independent unified EDC + eCOA platform vs. Veeva ecosystem EDC. Best fit for teams not already Veeva-native.

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Head-to-head

Why buy a static database when Castor AI automates the work? Two cloud-native platforms compared on AI-driven data capture, integrated eCOA, and global reach.

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Head-to-head

Eliminate the swivel chair. Unified EDC + eCOA on one database vs. specialist eCOA tools. Data flows directly into EDC with no transfers or integration overhead.

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Proven outcomes

Results from real studies

From protocol design to database lock, see how research teams run better studies on Castor.

Infectious Disease / EDC
Patients
+

WHO deployed Castor’s EDC to 5,000 investigators across 600 sites in 52 countries. Castor delivered adaptive medication allocation and rapid deployment in six languages at unprecedented global scale.

Decentralized Trials / eCOA
Patients in 15 Weeks

Julius Clinical and Takeda ran a fully remote DCT evaluating the Ava wearable device. Patients were screened, consented via eConsent, and monitored via Castor ePRO entirely off-site.

Endocrinology / Catalyst RWE
40 Hours Reduced to
39 Hour

Capture daily ePRO and wearable data for GLP-1 and metabolic trials. No separate eCOA vendor required. Consumer-grade patient apps achieve up to 95%+ daily compliance.

Digital Therapeutics / Gastro
Timeline Reduction
%

By deploying Castor’s unified EDC, ePRO, and eConsent platform, Mahana bypassed the integration tax of legacy systems and cut operational costs by up to 80% versus prior vendors.

Women's Health / eCOA
ePRO Compliance
%

For their pivotal Phase III trial, the sponsor deployed the Castor ePRO app to over 1,000 patients across 50+ sites in two months. The consumer-grade experience drove sustained 92% daily compliance.

Medical Device / eConsent
Enrollment Increase
%

MMI leveraged Castor’s digital eConsent workflows to remove friction for sites and patients, dramatically accelerating enrollment into their medical device trial.

Ranked for user friendliness among 10 ePRO providers
# 5
ISR Report 2023
Customer satisfaction rating across all clinical segments
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Castor verified metric
Long-term client retention rate
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Castor verified metric
Independent reviews

Consistently rated top-tier by clinical research teams

Two independent review platforms. Two consistent verdicts from researchers and procurement teams who use Castor every day.

What customers say

Trusted by research teams worldwide

Whatever the indication, the platform foundation is the same: unified, fast, and built for regulated environments.

Using Castor allowed for a 2.7x faster study build and a 63% build time reduction compared to previous methods.

Nicco Reggente

Principal Investigator · IACS

Castor is very intuitive and easy to use for end users. We were able to learn how to build studies very quickly, which enables us to manage those in-house studies with our internal team and increase enrollment by at least 2x.

Sandra Tobisch

Senior Clinical Trial Manager · Essity

By leveraging Castor RWE and eCOA, we were able to run our oncology studies with 95%+ patient compliance while saving an estimated $100k in staffing costs.

Dr. Michael Liss

Principal Investigator · Oncobiomix

Frequently asked questions

Yes. Castor EDC holds a 4.7 out of 5 rating on Capterra based on 204 verified reviews, with strong scores for ease of use (4.7) and customer service (4.7). On G2, Castor independently holds 4.6 out of 5 based on 126 reviews.

Castor is the preferred choice for academic institutions, emerging biopharma, and medical device companies that need fast deployment, transparent pricing, and a natively unified EDC and eCOA platform. With Castor, 90% of studies launch in under 4 weeks, bypassing the 12-to-16-week build cycles typical of enterprise legacy systems. Medidata Rave is better suited to large pharma and global CROs with established enterprise workflows and the deepest regulatory submission history requirements. For a full feature-by-feature comparison, see Castor vs Medidata.

Yes. Castor publishes verified customer success stories covering a range of study types , from decentralized RCTs to global outcomes trials. The case studies section on this page includes a selection of verified outcomes. You can explore all case studies at castoredc.com/success-stories/.

Castor publishes independent category comparisons for EDCeCOAeConsent, and RWE platforms, and detailed head-to-head pages comparing Castor to seven specific competitors. All comparison pages are linked in the sections above.

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