Charlottes Webb Investigations
“Could not have been more helpful in every aspect PS she knows how to get the job done right”
Best Private Investigators near Alameda, CA
1 of these agencies is based in Alameda; the others serve Alameda from towns including San Francisco (10 mi), Oakland (3 mi) and Belvedere Tiburon (13 mi).
9 open 24/7 · 11 open weekends · 9 rated 4.5+ · 5 show a license
Data verified October 16, 2026
San Francisco & Bay Area Investigations
“He helped make the whole process smooth and straightforward during an otherwise stressful situation, which I appreciated.”
Gotcha Legal Services
“I called Gotcha Legal Services late Friday evening and they were able to expedite the services that I needed.”
Filley and Associates - San Francisco Private Investigator
“Extremely professional and provided additional information to help me with my reported issue.”
Dewitt Detective Agency
“The man is not just competent, he's very nice and reassuring, which is good when you're falling apart every ten minutes.”
Bond Investigations - Oakland
The 15 agencies on this page are the private investigators listed for Alameda, 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: Alameda, CA
13 of the 15 agencies on this page have a rating, from 4.0 to 5.0 across 118 reviews; 9 are rated 4.5 or higher. 9 are open around the clock; 10 are open on Saturdays and 11 on Sundays. The services the agencies on this page list most often on their websites are background investigations (2), infidelity investigations (2) and surveillance (2). 5 show a license on their websites. 14 have ten or more years of experience, the longest 35 years. 9 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 all 15 of the agencies on this page; 14 publish a contact page and 13 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 Alameda describe their work online?
All 15 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.
Foglight Investigations
“Art understood the situation and did a great job communicating with me.”
Aal and Associates
“He even provided me with relevant information as a consultation to give me an idea if it was worth pursuing.”
Neilson & Macritchie Invstgtrs
Security Special Services
“Our businesses have used Security Special Services several times and we have always been impressed with the professional and excellent services they provide.”
The Screening Group- Background Checks
“They always answer their phones (even in weekends), and help us understand the legal minefield of Background Checks.”
Kroll Associates
Passanisi Investigations
Webster Christopher
Investigative Analysis
Why these companies made our list
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