1. HopeStage Research: best for plain-English mental health search
HopeStage Research focuses on mental health studies and explains public records in simpler language. It is useful when you want to search by condition or country, understand recruitment status, compare practical next steps, and then verify the official source.
2. ClinicalTrials.gov: best for official study records
ClinicalTrials.gov is one of the main public registries for clinical studies and often has the most detailed official record, including criteria, locations, sponsors, status, and source identifiers. It can be technical, so it works best as the verification layer.
3. NIMH: best for U.S. mental health research context
The National Institute of Mental Health provides mental health-specific information about clinical trials and NIH-funded studies. It is useful when you want trustworthy context before reviewing a specific study record.
4. EU CTIS and WHO ICTRP: best for broader international search
The EU Clinical Trials Information System helps people search clinical trials in the EU and EEA. WHO ICTRP is useful when you want a wider registry search across multiple countries and registry providers.
5. Commercial matching tools: useful, but check the model
Some sites offer matching, lead forms, or paid study discovery. They can be convenient, but always check who runs the site, what happens to your data, whether all studies are shown, and where the official registry record is.