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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 Walnut Creek (16 mi).
12 open 24/7 · 15 open weekends · 17 rated 4.5+ · 10 show a license
Data verified October 16, 2026
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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.”
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Gotcha Legal Services
- Team
- Documents
- Property
“He help walk me through what I needed to do to get the ball rolling and kept in contact with me through the next day which is when the person was served.”
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Denver Moore Investigations of Contra Costa County
- Matter
- Individual
- Phone
“Not only does he possess the expansive skill set through his years of experience, but he is a straightforward and genuine individual, whose wisdom and insight are second to none.”
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Filley and Associates - San Francisco Private Investigator
- Information
- Results
- Understanding
“I had a very unique and difficult problem in China that needed a skilled and knowledgeable person on the ground to collect reliable information and contact appropriate agencies including different police departments.”
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Dewitt Detective Agency
“I am so thankful that the other three agencies I called before Jason did not answer their phones because I wouldn't have found Jason Dewitt.”
The 24 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
22 of the 24 agencies on this page have a rating, from 4.0 to 5.0 across 172 reviews; 17 are rated 4.5 or higher. 12 are open around the clock; 14 are open on Saturdays and 14 on Sundays. The services the agencies on this page list most often on their websites are surveillance (3), background checks (2), background investigations (2), ceu & cle training (2) and field investigations (2). 10 show a license on their websites. 21 have ten or more years of experience, the longest 35 years. 12 offer urgent consultations; 7 offer a free initial consultation and 2 are family- or locally-owned. 1 has Spanish-speaking staff. We have a website on file for all 24 of the agencies on this page; 21 publish a contact page and 20 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 24 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.
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Bond Investigations - Oakland
“Great services”
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Foglight Investigations
- Info
- Art
- Security
“The team is ex law enforcement so they are very familiar with escalation protocols, and have educated me on such to always ensure we are giving the right directives, and never opening ourselves up to risk”
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Private Eyes Screening Group
- Responsive
- Work
- Account Manager
“Anytime Jamie is out, I reach out to Cynthia directly, and I feel like she knows exactly whats going on with any screening I call her about.”
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K & K Confidential Investigations
“From the time I first met them almost a year ago to more recent contact, I've been appreciative of their hard work and effort to go above and beyond my expectations”
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Jim Baca Investigations
“He had excellent advice which answered questions I didn't know enough to ask and he took it upon himself to educate me so I wouldn't make expensive mistakes.”
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Marin Private Investigations
“I have used them on 2 occasions and both times they were absolutely thorough, completely discrete, got the job done with no fuss and no muss, and they charged a very low price.”
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Aal and Associates
- Mind
“He was always very attentive and asking the right questions, while also having the right amount of skepticism that I imagine only comes with years of doing this kind of work.”
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MZ & Associates Private Investigations
“I went over and reached out to Maritza for child support help, even though she did not provide that service she went ahead and recommended me to someone.”
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Neilson & Macritchie Invstgtrs
“NMI has been investigating toxic tort cases since the early 1980's and asbestos defense investigations since the early 1990's and are experts at creating investigation plans that address both product identification claims and develop alternative expo...”
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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.”
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The Screening Group- Background Checks
“They always answer their phones (even in weekends), and help us understand the legal minefield of Background Checks.”
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Kroll Associates
“Love to get hired you.”
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Michael Ramey & Associates
“Michael Ramey & Associates is a full-service, results-oriented investigative firm since 1993 licensed in California, Oregon and Washington, and experienced in all forms of workers' compensation, disability, casualty, general liability, inland marine,...”
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Passanisi Investigations
“Established in 1988, we serve the Insurance and Legal communities from our offices in San Francisco, Los Angeles and Sonoma, California.”
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Webster Christopher
“Mr. Webster is a past president of C.A.L.I. and the N.C.F.I.A. With a passion for excellence, and continuing education through the industry, he consistently serves on the Board of Directors for the above named investigative associations. In addition,...”
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Investigative Analysis
“Ross T. Hite is a well regarded private investigator licensed to practice in California and Louisiana. Ross began his career in law enforcement and has over 30 years experience in civil and criminal trial preparations. In August 2010, the Professiona...”
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Specialized Investigations
“Hot, hot, hot!”
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Background Check- Protection Plus Solutions
“Great people there to help”
Private Detective Services in Alameda, CA Cost Estimates
Minimum cost
$338
Maximum cost
$10673
National Average
$1349
Avg Per Hour Rates
$141
$787
$2247
Average price range is based on 327 cost profiles
Why these companies made our list
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