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Best Private Investigators in Philadelphia, PA

Our Recommended Top 11

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Our goal is to connect people with the best local professionals. We scored Philadelphia Private Investigators on more than 25 variables across five categories, and analyzed the results to give you a hand-picked list of the best.



11Top Picks

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featured provider = Featured Provider

Philadelphia, PA 19111 Rating

Review Sources

4.9 (59)
4.7 (12)

Why choose this provider?

Based in Philadelphia, Warstone Investigative and Security Systems is a certified Service Disabled Veteran Owned Small Business specializing in surveillance, criminal investigations, employment screening, and insurance-related and other forms of fraud. They boast discretion, honesty, and competitive pricing. The founder of Warstone Investigations has a master's degree in business and an international range of law enforcement contacts. He founded the company with the aim of providing jobs for local law-enforcement and military veterans. This business has a five-star overall customer review from Thumbtack.

Exton, PA 19341 Rating

Why choose this provider?

Located in the Philadelphia suburbs, Egis International Inc. Special Investigations Division serves law firms, insurance companies, government agencies, third party administrators, and corporations throughout Pennsylvania and New Jersey. Founded in 1986, Egis International hires seasoned professionals with formal education in criminal justice and at least 15 years of industry experience. Specialties include process service, surveillance, background checks, auto accident liability, missing persons, asset checks, public records searches, criminal defense, scene diagrams and photographs, household checks, and related investigations. This firm is a Member of the Pennsylvania Association of Licensed Investigators and a Founding Member of the U.S. Department of Homeland Security.

Philadelphia, PA 19102 Rating

Why choose this provider?

Philadelphia's Signature Investigative Group was founded in 2008 by Patrick J. Reilly Jr. a retired New Jersey State Police Captain and graduate of the FBI National Academy with more than 25 years of law enforcement experience. This firm boasts a team of professional investigators who are seasoned former federal, state and regional retired law enforcement professionals. Services include attorney support, corporate investigations, insurance fraud, domestic issues, law enforcement consultation, forensics, research, and VIP protection services.

Huntingdon Valley, PA 19006 Rating

Review Sources

4.0 (4)

Why choose this provider?

Magnum Investigations is a Philadelphia-area firm with two convenient suburban locations, specializing in video surveillance for domestic issues including child custody, infidelity, and alimony investigations. This licensed, bonded, and fully insured firm offers free consultations and requires a retainer for ongoing service. Magnum Investigations also provides courtroom services and expert testimony as well as a VIP service for high-profile customers. Clients praise their professional demeanor and exceptional level of investigative detail.

Springfield, PA 19064 Rating

Why choose this provider?

IRG Investigative Response Group provides private detective services with quality and integrity throughout Pennsylvania, New Jersey, and Delaware. IRG specifically serves the insurance industry and was founded in 2009 by Sean Grant, who has over 15 years experience as former Director of Operations for Willis North America Risk Mitigation Division. Services include insurance investigation to mitigate loss and fraud, high-quality surveillance video using cutting-edge equipment and techniques, and accident scene investigation including photography, witness interviews, measurements, and more.

Glenside, PA 19038 Rating

Why choose this provider?

SFS and Associates LLC provides licensed, bonded, and insured surveillance and investigation services throughout the Philly metropolitan area, including New Jersey. This firm is affiliated with the National Council of Investigation and Security Services and the Pennsylvania Association of Licensed Investigators. Services include insurance defense, workers compensation investigation, neighborhood investigations, domestic issues, background screenings for employment, theft, covert operations, passive GPS tracking, and undercover investigations.

Philadelphia, PA 19136 Rating

Why choose this provider?

Philadelphia Surveillance Company has more than 25 years of experience in surveillance, locating missing persons nationwide, process serving, background checks, and related services. This firm is affiliated with Pennsylvania Association of Licensed Investigators, National Council of Investigation and Security Services, and New Jersey Private Investigators Association. They serve all of Pennsylvania and New Jersey and offer free, no obligation consultations for potential clients who may benefit from private investigation.

Bensalem, PA 19020 Rating

Why choose this provider?

Based in Bensalem, PA, Atlantic Security International Investigations Incorporated comprises 20 full-time staff, 15 part-time staff, and 20 strategic alliances to provide specialized services. They have been featured on NBC, CBS and Fox affiliate news stations, worked on high-profile criminal cases in the region, and served Fortune 100 companies. Specialties include insurance fraud, legal support, corporate investigations, information services, security, and related areas of practice.

Exton, PA 19341 Rating

Why choose this provider?

Based in the Philadelphia suburbs, ELPS Private Detective Agency is a team of licensed and bonded male and female investigators with more than 20 years of industry experience. This fully licensed and bonded firm is open 24 hours a day, seven days a week and offers free consultations at the client's chosen location. Specialty areas include insurance fraud, defense investigations, intellectual property investigations, marital issues, and corporate investigations. They strive to produce thorough, prompt, high-quality results.

Kimberton, PA 19442 Rating

Why choose this provider?

Kane Detective Agency was founded in 1993 in Berks County, PA and serves clients throughout the state. Offerings include background investigations, surveillance, employee and tenant screening, witness statements and interviews, litigation support, and much more. This licensed, bonded, and insured private detective offers free client phone consultations 24 hours a day, seven days a week.

Chesterbrook, PA 19087 Rating

Review Sources

4.8 (52)
5.0 (2)

Why choose this provider?

M. Goldman Investigations specializes in marriage, divorce, and child custody investigations throughout the Philadelphia metropolitan area in both Pennsylvania and New Jersey. Services include videotape surveillance, computer forensics, background checks, missing persons, asset searches, hidden cameras, polygraph exams, and GPS tracking. This firm is completely licensed, bonded, and insured, has more than 20 years of professional experience, and is associated with the Southeastern Pennsylvania Private Investigators Association. Goldman offers free, no-obligation quotes through a simple form on his website. He keeps information completely confidential and specializes in finding information through complex, challenging research that is hard for others to obtain.

Compare our Top Private Investigators

NameExpertise RatingAddressPromotionsLearn more
Warstone Investigative and Security Systems
Philadelphia, PA 19111
Egis International Inc. Special Investigations Division
Exton, PA 19341
Signature Investigative Group
Philadelphia, PA 19102
Magnum Investigations
Huntingdon Valley, PA 19006
IRG Investigative Response Group
Springfield, PA 19064
SFS and Associates LLC
Glenside, PA 19038
Philadelphia Surveillance Company
Philadelphia, PA 19136
Atlantic Security International Investigations Incorporated
Bensalem, PA 19020
ELPS Private Detective Agency
Exton, PA 19341
Kane Detective Agency
Kimberton, PA 19442
M. Goldman Investigations
Chesterbrook, PA 19087


  • Introduction

    Some cases grow cold without ever getting solved by the police, and others tend to be too unorthodox for the police since they're mainly limited to criminal cases. This is where private investigators come in.

    Private investigators, also known as PIs, offer a wide range of services, including finding missing persons, tracking marital infidelity, investigating theft, running background checks, verifying insurance claims, and collecting debts on behalf of their clients.

    PIs work on any case requiring extensive research and investigation. Their duties range from gathering vital facts and connecting clues to providing conclusive information regarding the case.
  • What is a private investigator?

    Private investigators are experienced individuals hired to carry out detective work. They are fact-finding experts who dedicate time and effort to gather evidence and reveal information that would be difficult to gain through ordinary means. Private investigators can either operate alone or work for an agency.

  • Are private detectives real?

    Yes, private investigators are real. They provide their expertise to anyone who needs an in-depth investigation for an important matter. Whether tracking a long-lost loved one, running background checks, finding missing persons, or conducting general research, private detectives operate with discretion and rarely make the news.

  • What do private investigators do?

    PI work involves a lot of information gathering and fact analysis. Their field assignments involve carefully following persons of interest, conducting surveillance, interviewing people, and, sometimes, going undercover to get more information. They use GPS tracking devices, video recorders, computers, and other technology to collect information.

  • How do private investigators work?

    Private investigators’ ability to conduct examinations and close cases without their targets knowing their involvement makes them very effective. A PI firm may have different personnel, each specializing in a particular field. From computer experts to web-data analysts and field officers, these agents work together to solve cases or complete an objective.

  • What is a private investigator allowed to do?

    PIs are civilians, so they're required to operate within the confines of the law. Private investigators search multiple online databases, public records, and open source files to collect information. However, they cannot bug phones or hack into online accounts to acquire protected information. They can conduct surveillance on people in public places, but they can't trespass into their homes or property.