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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Where Studies Run in San Francisco

Top Trials Near San Francisco

The ROAR Study: Reactive Oxygen Species and Reproduction

SPL Insufficiency Syndrome (SPLIS)/NPHS14: a SPLIS Observational Study and Patient Registry (International)

The Use of Lymph Node Biopsies to Support HIV Pathogenesis Studies

PREVENT ALL ALS Study

Mobile App to Help Survivors of Childhood Cancer Navigate Long-Term Follow-Up Care

Chronic Infections and Inflammation in ME/CFS: An Observational Study

Genomic Sequencing in Anatomically Normal Fetuses

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

ChangeGradients: Promoting Adolescent Health Behavior Change

Comparative Pharmacokinetics and Pharmacodynamics of Synthetic Nicotine

Observational, Non-Interventional Study Supporting Validation of VO2Max Estimation Methods Using Results in Patients Receiving Standard of Care Cardiopulmonary Exercise Tests (CPET)

Precision Dosing of Metformin in Youth With T2D

Role of Transposable Elements in Septic Immune Aging

Aspirin Dose Escalation for the Prevention of Recurrent Preterm Delivery Trial

Studying the Effects of Digital Interventions on Cognition, Wellbeing, Stress, and Sleep in Older Adults

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