Private Investigator Agencies locations near Greenbrae, CA

Showing 1–6 of 6 results

We track 6 private investigator agencies listings in and around Greenbrae, CA, spread over 6 ZIP codes. Listings here were last checked in Nov 2026.

Barbier Security Group

Security Guard & Patrol Services

📍 369-b 3rd St #440, San Rafael, CA, 94901

📞 415-747-8473

🌐 www.barbiersecurity.com

Barbier Security is a full service security company. We are family owned and operated, with roots in the community going back 4 generations.

Evolution I

Private Investigators & Private Detectives

📍 1450 Sutter St #516, San Francisco, CA, 94109

📞 415-800-4442

🌐 www.evolutioni.com

A California based licensed and insured security consulting and investigation company. Evolution I can handle your most complex investigation needs. Contac

Updated Nov 2026

Filley And Associates

Private Investigators & Private Detectives

📍 5758 Geary Blvd Ste 348, San Francisco, CA, 94121

📞 415-462-1631

🌐 www.filley.com

Private Investigator services in San Francisco, Marin, the Bay Area, California and US wide. We conduct background checks, asset checks, cheating spouse