VERDICT
Show glossary - clinicaltrials.gov
Depends. If you sponsor FDA-regulated trials, you have no choice: it is free and legally mandatory. Patients and researchers get the gold-standard trial dataset, but expect a clunky, dated interface.
Medium. Based on 45+ public sources: NIH official pages, BMJ/NEJM studies, FDA-enforcement news, and practitioner Reddit threads.
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Public registry
high
FDAAA makes registration and results posting mandatory for applicable US trials; FDA issues violation notices.
high
FDA signaled heightened enforcement focus in 2026 — late reporting carries real legal risk.
medium
Universities may bill researchers for registration support; Emory lists a one-time $3,500 fee.
medium
Basic search frustrates users; use Expert Search or the free API for serious queries.
Value for money: 5/5
Rating
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Starting price
16
Sources
Analyzed
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No known vulnerabilities found in the sources reviewed.
Practitioners treat it as the indispensable canonical registry but consistently complain the search and navigation are painful.
“clinicaltrials.gov is the most mind-numbingly awful site to ...”
“Anyone else find clinicaltrials.gov hard to navigate? Any ...”
Compare ClinicalTrials.gov with each alternative.
WHO's global portal to all primary trial registries worldwide.
ClinicalTrials.gov vs WHO ICTRPFree relational database mirroring ClinicalTrials.gov for easier analysis.
ClinicalTrials.gov vs AACT (CTTI)Commercial biomedical database now embedding 500K registry records.
ClinicalTrials.gov vs EmbaseBased on 45+ public sources: NIH official pages, BMJ/NEJM studies, FDA-enforcement news, and practitioner Reddit threads.
Free, legally required registry for US trials; gold-standard data, dated UX. Patients: use it, but brace for friction.
Based on 45+ public sources: NIH official pages, BMJ/NEJM studies, FDA-enforcement news, and practitioner Reddit threads.
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