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Best Private Investigators in New York, NY

Our Recommended Top 12

We did the research for you!

  • Licensing
  • User Reviews
  • Mystery Shopping Calls

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



12Top Picks

Learn about our selection process.


featured provider = Featured Provider

One Grand Central Place 60 East 42nd Street Suite, New York, NY 10165 Rating

Review Sources

4.2 (5)

Why choose this provider?

Cornelius Investigations LLC is a licensed, bonded, and insured investigations agency in New York City that conducts private investigations for many of New York City’s top law and corporate firms, as well as for individuals. The agency’s investigations team, including the founder Scott Prendergast, were formerly with the New York Police Department (NYPD) or New Jersey State Police. Services offered include private investigations, surveillance, computer forensics, executive protection, and event security. The agency also helps attorneys investigate business and insurance cases, family law issues, and background checks.

  • Surveillance
  • Investigations
  • Security
  • Computer Forensics

108-14 72nd Avenue, Forest Hills, NY 11375 Rating

Review Sources

5.0 (9)
5.0 (1)

Why choose this provider?

TIO Square Inc. is a private detective firm and technology agency in Queens that covers New York City, Long Island, and Westchester. Collectively, its investigators have many years of experience in gathering investigative intelligence and forensic evidence for businesses and private clients. Services provided include background checks, witness interviews, surveillance investigations, and fraud investigations. Among its clients are law firms, private individuals, insurance companies, corporations, government agencies, and corporations. Kieffer Ramirez is the director of investigations and information technology. He has more than 18 years of investigative experience.

  • Background Check
  • Asset Searches
  • Forensic Consultant
  • Criminal and Civil Investigations
  • Identity Theft

43-49 10th Street, Suite 404-C, Long Island City, NY 11101 Rating

Why choose this provider?

Investigreat LLC is a firm of private investigators based in the Long Island City area of Queens, New York City. Founded in 2013, it serves clients throughout NYC, Long Island, and Connecticut. The firm is fully licensed, insured and bonded, handling cases for clients who suspect their partner is being unfaithful, or their spouse has failed to pay child support, or in pursuit of missing persons for worried family members. Investigreat LLC provides a 24/7 service for all clients.

  • Private Investigator
  • Surveillance
  • insurance claim

New York City, NY 10004 Rating

Review Sources

4.5 (23)

Why choose this provider?

American Eagle Investigations is an investigative company in New York City that has been serving individuals and businesses for 20 years. The company offers domestic and civil investigations, background checks, insurance fraud investigations, and attorney services. American Eagle Investigations is also associated with American Society for Industrial Security, The American Polygraph Association, and the National Association of Investigative Specialists.

New York City, NY 10019 Rating

Why choose this provider?

RQ Investigations is a leading private investigation firm in New York City that offers quality service at affordable rates. This professional and multi-lingual firm specializes in background investigations, criminal defense investigations, surveillance, and school district services. RQ Investigations is fully licensed and insured and employs highly trained investigators who use cutting-edge technologies to achieve satisfactory results.

244 5th Avenue, New York, NY 10001 Rating

Review Sources

5.0 (4)

Why choose this provider?

New York City-based Gross Investigation Bureau, LLC, offers private investigative services to organizations and individuals. The experienced staff consisting of forensic examiners, private investigators, analysts, engineers, and electronic technicians has the same goal, which is to deliver quality information research, collection, and analysis. They also specialize in obtaining proof of information. Services include surveillance, witness interview, and forensic investigation. This agency also specializes in missing person, relationship, background, and incident investigations.

New York City, NY 10001 Rating

Why choose this provider?

Investigative Solutions LLC is a Manhattan-based private investigation agency that serves the New York and New Jersey area. This full-service agency offers services such as surveillance, background checks, GPS tracking, and computer forensics, among others. Investigative Solutions LLC is also associated with Society of Former Special Agents of the Federal Bureau of Investigation, NCISS, NJLPIA, and Certified Fraud Examiner (CFE).

New York City, NY 10007 Rating

Review Sources

5.0 (1)

Why choose this provider?

J.T. Mullen Private Investigator is a firm in Manhattan, New York that has been providing comprehensive and innovative investigative services for more than 40 years. They specialize in corporate financial investigations, protective services, asset searches, and custody challenges. J.T. Mullen Private Investigator has acquired impressive testimonials and recognition from Crain’s, the New York Post, New York Law Journal, among other outlets.

55 Maple Ave Suite 304, Rockville Centre, NY 11570 Rating

Review Sources

5.0 (9)
4.0 (6)

Why choose this provider?

International Investigative Group is a family-owned and operated company in New York City. Private investigators at this firm are dedicated to helping their clients resolve difficult situations like uncovering misdemeanors in a company or gathering evidence for cases. This firm offers all-around security and investigation services such as surveillance, personal investigation, and financial fraud investigation. Established in 1990, this company has handled over 10,000 cases and has been named one of the top 15 investigators in the United States.

New York City, NY 10011 Rating

Review Sources

5.0 (1)

Why choose this provider?

CPI Investigations is a private investigation firm in Manhattan, New York that provides services in all 50 states as well as to other parts of the globe. The firm specializes in polygraph/lie detection tests, personal and corporate protection, surveillance, background checks, and electronic eavesdropping protection, as well as litigation support and case assistance. CPI Investigations is proud to be affiliated with the American Association of Police Polygraphists, American Polygraph Association, and The PI Group, among other organizations.

1611 East 19th Street, Brooklyn, NY 11229 Rating

Why choose this provider?

Brener Investigations Group is a full-service firm that caters to people and businesses in New York City. For over 25 years, its private investigators have conducted discreet and confidential relationship investigations involving infidelity. They also locate missing persons like heirs, witnesses, and debtors by working with law enforcement officials. In addition, they handle employee theft, competitor insight, spousal support, and conflict of interest cases. The company has certified fraud examiners who are fluent in Spanish and Russian.

521 Fifth Avenue, 43rd Street, New York, NY 10175 Rating

Why choose this provider?

JL & Associates. Ltd., provides 24-hour private investigator services worldwide from its central office in New York City. Its specialty is in confidential corporate investigations, including business intelligence, due diligence investigations, white crime, and internal theft investigation. Possessing over 60 years of combined experience, the company's private investigators have backgrounds in law enforcement and intelligence. They have served clients ranging from small businesses to Fortune 500 companies. The firm is a member of the World Association of Detectives and the Council of International Investigators.

Compare our Top Private Investigators

NameExpertise RatingAddressPromotionsLearn more
Cornelius Investigations
One Grand Central Place 60 East 42nd Street Suite, New York, NY 10165Free consultation
TIO Square Inc.
108-14 72nd Avenue, Forest Hills, NY 11375Call for pricing
Investigreat, LLC
43-49 10th Street, Suite 404-C, Long Island City, NY 11101Free consultation
American Eagle Investigations
New York City, NY 10004
RQ Investigations
New York City, NY 10019
Gross Investigation Bureau, LLC
244 5th Avenue, New York, NY 10001
Investigative Solutions LLC
New York City, NY 10001
J.T. Mullen Private Investigator
New York City, NY 10007
International Investigative Group
55 Maple Ave Suite 304, Rockville Centre, NY 11570
CPI Investigations
New York City, NY 10011
Brener Investigations Group
1611 East 19th Street, Brooklyn, NY 11229
JL & Associates, Ltd
521 Fifth Avenue, 43rd Street, New York, NY 10175


  • 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.