Best Private Investigation Service in San Francisco

Expert recommended Top 3 Private Investigation Service in San Francisco, California. All of our private investigators face a rigorous 50-Point Inspection, which includes customer reviews, history, complaints, ratings, satisfaction, trust, cost and general excellence. You deserve only the best!


350 Rhode Island Street, Suite 240, San Francisco, CA 94103 Directions

Since 2000

Filley & Associates are uniquely skilled in providing the range of services required of a detective firm in today’s environment. Their investigators provide cost-efficient, results-oriented inquiry services and find a solution that completely suits your situation and wants. From the latest covert, low light, and distance camera kits to the most comprehensive and accurate databases available within them, and they apply the best tools for the right situation. They employ the most effective strategy to reach your case goals, based on their in-depth expertise. Contact them and get a complimentary consultation.

Business Intelligence, Intellectual Property, Asset Checks, Background, Business, Due Diligence, Fraud, Probate, Family Law, Civil, Criminal, Support and Scene Investigation, Insurance Surveillance, SCUBA Claims, Process Service, Litigation Missing Persons & Cheating Spouse

License #23042

[email protected]


Mon - Fri 8:00 am - 6:00 pm
Sat & Sun Closed

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101 California Street, Suite 2710, San Francisco, CA 94111 Directions

Since 1999

Dewitt Detective Agency is a wide-ranging detective agency that wields any investigative task and keeps personal attention to detail that has gained them the name. The company handles virtually any case, anywhere in the world. Jason Dewitt is the ‘go-to-guy’ for the various challenging assignments. Their crew has tenacity, creativity, and discretion to those that entrust them with most issues and specializes in many areas of private inquiry. Dewitt Detective Agency was available any time and spot to assist you with whatever your needs may be. You can get a free complete case review, consultation, and study.

Surveillance, Missing Persons, Child Abductions, Background Checks, Honesty Verification, Infidelity, Cheating Spouse/Partner Issues, Child Custody Matters/Divorce Issue, Civil and Criminal Cases, Asset Searches, Bank Account Locates, High Profile/Celebrity Protection, Stalker & Workplace Investigations

License #21992

[email protected]


Open 24 Hours

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588 Sutter Street, San Francisco, CA 94102 Directions

Since 1969

Denver B. Moore Investigations is an approved and insured agency that has connections and partners in all US states as well as worldwide. The PI agency has been providing confidential inquiries and related services to business and private clients. Denver B. Moore is highly qualified and adept at revealing intelligence and information from hidden sources. Their organization specializes in covert monitoring for family, domestic, and infidelity troubles. They have proven investigative techniques, linked with the latest technology and equipment. Connect with them and get a free 10-minute consultation.

Background Screening, GPS Tracking, Fraud, Criminal, Civil and Child Custody Investigations, Missing Person Locates, Business Searches, Bug Sweeps, De-Bugging Services, Insurance Service of Process, Product Liability Cases, Vital Records Research, Surveillance, Witness Location, Worker's Compensation, Infidelity & Cheating Spouse

License #PI-9341

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Open 24 Hours

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