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

EyeConic: Qualification for Cone-Optogenetics

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

BID WM Digital Intervention in Aging

Reward Processing and Depressive Subtypes: Identifying Neural Biotypes

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

Trauma-Informed Care for Smoking Cessation for Pregnancy

Effects of Sabroxy® Supplementation on Insulin Resistance and Cognitive Function in Adults With Mild Cognitive Impairment and Insulin Resistance

The Use of Lymph Node Biopsies to Support HIV Pathogenesis Studies

Effects of KSM-66 Ashwagandha® (300 mg) on Skin and Hair Health in Healthy Men and Women"

Childhood Cancer Survivor Study

Understanding the Clinical Pharmacology of Marijuana-Tobacco Co-administration

Efficacy and Safety of Shatavari Root Extract in Women's Sexual Wellness

CONNECTing to LungCare

Pilot Trial of Fetoscopic Endoluminal Tracheal Occlusion (FETO) in Severe Left Congenital Diaphragmatic Hernia (CDH)

Patient-centered Information on Permanent Contraception

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