Best Private Investigators in Danville, CA
14 agencies listed · 4 in Danville · 3 open 24/7 · 6 open weekends · 11 rated 4.5+
Data verified October 17, 2026
Background Check- Protection Plus Solutions
“I would highly recommend this company for anyone who needs to do backgrounds!!”
The Framé Group
Spotlight P.I.
“He is good at dealing with the investigation both personally and professionally.”
Denver Moore Investigations of Contra Costa County
“Got the facts from the case in which I presented, kept me informed, up-to-date and stuck with me up to closure.”
Private Eyes Screening Group
“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.”
The 14 agencies on this page are the private investigators listed for Danville, 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: Danville, CA
4 of the 14 agencies we list are based in Danville; the other 10 serve Danville from towns including Walnut Creek (7 mi), Pleasant Hill (10 mi) and Concord (11 mi). 13 of the agencies on this page have a rating, from 3.9 to 5.0 across 70 reviews; 11 are rated 4.5 or higher. 3 are open around the clock; 6 are open on Saturdays and 4 on Sundays. 8 show a license on their websites. Domain records put 9 websites of the agencies on this page at ten or more years old; the oldest dates from 1997. 3 offer urgent consultations and 4 offer a free initial consultation. We have a website on file for all 14 of the agencies on this page; 12 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 Danville describe their work online?
All 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.
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”
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.”
Book onlineBook
MZ & Associates Private Investigations
“I have referred a couple of clients to her for public notary service and she is the person who will always go the extra mile to get the job done.”
Specialized Investigations
Denver Moore Investigations of Pleasanton
“I am very pleased with the services that was provided to me.”
1st Defense Patrol
“John Sebastian and his team have created, and maintain, a staff of experienced and proficient back-end administrative managers, and their patrol guards are neat, polite and ultra-professional.”
Perez Investigations
“Very professional great results in a timely manner.”
Nighthawk Investigations Walnut Creek
Why these companies made our list
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