Bosco Legal Services
“Wow, I'm amazed at how good they are at finding what you're looking for.”
Best Private Investigators near Rialto, CA
1 of these agencies is based in Rialto; the others serve Rialto from towns including Riverside (12 mi), Rancho Cucamonga (10 mi) and Fontana (4 mi).
3 open weekends · 9 rated 4.5+ · 2 show a license
Data verified October 16, 2026
RJN Investigations
“Extremely knowledgeable, pointed me in the right direction.”
Ci&s Investigations
“They quickly gave me much needed advice, and worked with me on a solution to my issue.”
Pyrocop
Stone Investigation Services
“He can think outside the box, but also capable of patience meticulous investigation.”
Integrity Legal Support Services
“I have also used them to handle a couple personal matters, and have been equally satisfied.”
The 11 agencies on this page are the private investigators listed for Rialto, 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: Rialto, CA
10 of the 11 agencies on this page have a rating, from 4.3 to 5.0 across 52 reviews; 9 are rated 4.5 or higher. 3 are open on Saturdays and 1 on Sundays. 2 show a license on their websites. 5 have ten or more years of experience, the longest 30 years. 1 offers remote or virtual consultations; 3 offer a free initial consultation and 2 are family- or locally-owned. We have a website on file for 8 of the agencies on this page; 5 publish a contact page and 2 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 Rialto describe their work online?
8 of the 11 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.
XPD Investigations
Ron Farris Investigations
All Cases Investigative Services
Gonzalez Exclusive Invstgtv
Kurk Investigative Group
Why these companies made our list
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