San Francisco & Bay Area Investigations
“Over the course of the Investigation, David proved to be not only an expert at his craft, but also very communicative and cooperative during the process, and always managed to set my mind at ease.”
Best Private Investigators in San Francisco, CA
14 agencies listed · 12 in San Francisco · 5 open 24/7 · 8 open weekends · 8 rated 4.5+
Data verified October 16, 2026
Gotcha Legal Services
“He is especially reliable if you have a deadline and need a rush service.”
Filley and Associates - San Francisco Private Investigator
“Scott is willingly to do whatever it takes to make sure the investigation is completed with the best accuracy.”
Dewitt Detective Agency
“The police department and the Local detectives assigned to our case all respected Jason and assured me we hired a legitimate detective.”
Foglight Investigations
“He is highly professional, extremely cordial (plus has a wicked sense of humor), highly informative of all PI processes, and prompt in returning correspondence.”
Neilson & Macritchie Invstgtrs
The 14 agencies on this page are the private investigators listed for San Francisco, CA. What each one states about its license, its specialties and the areas it covers comes from its own website; ratings and quotes come from public reviews.
Area overview: San Francisco, CA
12 of the 14 agencies we list are based in San Francisco; the other 2 serve San Francisco from Oakland (13 mi). 11 of the agencies on this page have a rating, from 4.0 to 5.0 across 128 reviews; 8 are rated 4.5 or higher. 5 are open around the clock; 7 are open on Saturdays and 7 on Sundays. 2 show a license on their websites. 10 have ten or more years of experience, the longest 45 years. 5 offer urgent consultations; 5 offer a free initial consultation and 1 is family- or locally-owned. 1 has Spanish-speaking staff. We have a website on file for 11 of the agencies on this page; 10 publish a contact page and 9 list a public email. We count these figures across the agencies on this page; distances are straight-line, and hours and prices change, so confirm the details with the agency before you book.
Which investigators listed for San Francisco describe their work online?
11 of the 14 agencies on this page have a website on file. Those pages are where an agency states its license, the kinds of investigation it takes on, and whether it works mainly for attorneys, for companies or for private clients. That last point changes how a report gets written.
Kroll Associates
Passanisi Investigations
Jinks Investigations
“As well as getting the building and health inspectors involved at the right times to address issue's said horrid property manager refused to address...”
Trustify - Private Investigation Services
“The PI I worked with was extremely responsive and put together a really helpful report.”
Fechheimer David B
America's Agency Investigation
Cannon Street
Bond Investigations - Oakland
Why these companies made our list
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