Detectives in Philadelphia, PA

Comprehensive list of private detective agencies and investigators servicing Philadelphia, PA.

Business Listings

Philadelphia's premier investigative firm, Gill and Associates., is widely known and respected in the legal and investigative communities and has been for over twenty years. We specialize in a multitude of services to fit your investigative requirements and welcome the possibility to work with you in finding solutions for them.


We currently have over twenty years of knowledge in litigation support, and have established a strong foundation of superior service and uncompromising care to detail. Over 80% of our new customers come to us upon referral from satisfied customers. Our work quality and word of mouth have made us one of the major and finest known investigations companies in the Philadelphia area.


Keystone Intelligence Network., is a one stop fully staffed investigative company that supplies a complete line of confidential investigative services. We provide a complete menu of professional services for the legal and business communities. Do you need professional investigative and/or security assistance? Do you want investigative results which reflect the best standards within the industry?



Licensed in Pennsylvania and New Jersey, Beck Group. is an expert investigative and protective services corporation. We are bonded and fully insured, with one million dollar liability coverage. Additional information concerning licensing and insurance matters is available upon request.

  • I had them clear some land so I could build a new greenhouse. i was quite cheep and very

The Masso Detective Agency was established by its President, Mike Masso, in Philadelphia, Pennsylvania. With forty years of knowledge, we're a complete-service security agency, bonded, licensed and insured in the Commonwealth of Pennsylvania.


D. O. Richardson & Associates is an investigative agency specializing in Insurance Fraud Investigations. Established in Philadelphia in 1990, we currently have rapidly grown into the leader in our sector. We have unmatched knowledge in combating Worker's Compensation and Liability Insurance fraud.


Our team, comprised of international and national investigative experts, utilizes state-of-the-art technology and global informational databases while incorporating an expert network of worldwide associates. The aim to Hopson Associates is to supply the very highest services; civil and criminal, corporate, financial.