Is GuineaPig free to use?

Yes, completely free. GuineaPig pulls data from ClinicalTrials.gov and adds compensation estimates, eligibility matching, and category filters to make it easier to browse. We don't charge volunteers or collect payment information.

How does GuineaPig estimate compensation?

Pay ranges are rough estimates based on the study's phase, duration, and typical industry rates. Phase 1 inpatient studies tend to pay the most because they require overnight stays. These are not confirmed by sponsors — always contact the study team directly for the actual compensation.

How often is trial data updated?

Trial listings are pulled from ClinicalTrials.gov in real time. New studies appear as soon as sponsors register them with the NIH. Study status, enrollment counts, and location data are updated whenever sponsors submit changes to the registry.

Does GuineaPig screen me or sign me up?

No. GuineaPig is a search tool only. When you find a trial you're interested in, click 'View on ClinicalTrials.gov' to get the study team's contact information. You'll go through the sponsor's own screening and enrollment process.

Clinical Trials inSan Francisco, CA

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Top Trials Near San Francisco

Dopamine and Sensorimotor Function in Stuttering

Comparative Pharmacokinetics and Pharmacodynamics of Synthetic Nicotine

A Safety and Immunogenicity Trial of Boost-2867 Vaccine, Via Intranasal and Intramuscular Routes

Safety, PK and Biodistribution of 18F-OP-801 in Patients With ALS, AD, MS, PD and Healthy Volunteers

Inflammatory Challenge and Fear

PET Imaging Study of 64Cu-GRIP B for Patients Receiving CD19-directed CAR-T Therapy

Spermatogonial Differentiation Via Testicular Organoid

Randomized Directly Observed Therapy Study to Interpret Clinical Trials of Doxy-PEP

Clinical Trial to Evaluate the Safety and Immunogenicity of Hiltonol, Poly-ICLC-adjuvanted CD40.HIVRI.Env (VRIPRO) in Adult Participants Who Previously Participated in HVTN 706

Safety Study of MucoCept-CVN

Clinical Trial to Evaluate the Safety and Immunogenicity of a Priming Regimen of 426c.Mod.Core-C4b Followed by HxB2.WT.Core-C4b Boosts, Both Adjuvanted With 3M-052 AF + Alum, in Adult Participants Without HIV and in Overall Good Health

Biological and Behavioral Outcomes of Community Nature Walks

First-in-Human Evaluation of an Astrocytic Glutamate Transporter (EAAT2) PET Tracer in Dementia

PET Imaging of Radiolabeled Anti-HIV-1 Envelope Monoclonal Antibody (VRC01)

This Study is Assessing the Safety and Efficacy of Immune Inhibition as a Treatment to Prevent Primary Graft Dysfunction

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