Best Private Investigators in New York City

Why These Private Investigators?

Our goal is to connect people with the best local experts. 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.

Reviewed Curated Top Picks 2,019 1,219 20

Our Selection Criteria:

  • 1. Availability

    Consistently approachable and responsive, so customers never feel ignored.

  • 2. Qualifications

    Building customer confidence with licensing, accreditations, and awards.

  • 3. Reputation

    A history of delighted customers and outstanding service.

  • 4. Experience

    Masters of their craft, based on years of practical experience and education.

  • 5. Professionalism

    Providing service with honesty, reliability, and respect.

Read more about our selection process

Cornelius Investigations FEATURED

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.

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


Worldwide Intelligence Network FEATURED

Worldwide Intelligence Network is a team of private investigators that operates throughout the five boroughs and Los Angeles. The detectives provide infidelity investigations, surveillance, and executive background investigations. The investigators also look into matters of employee misconduct and cases of workers' compensation fraud. Worldwide Intelligence Network has been ranked among the best five private investigation companies in the United States by publishers of The New Yorker, Vanity Fair, and Vogue.

32B Broad St E
Mount Vernon, NY 10552



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.

108-14 72nd Avenue
Forest Hills, NY 11375

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AAA Investigations & Consulting, Inc.

AAA Investigations & Consulting, Inc. is a licensed and bonded private investigation company in New York, New York that offers quality investigative services and consultations at unbeatable prices. They have a range of specialties, which include criminal cases, cheating spouses, corporate investigations, and business practices. AAA Investigations & Consulting, Inc. also provides attorney referral services and in-house legal counseling.

New York City, NY 10036


Ace Investigations & Protection Inc.

Ace Investigations & Protection Inc. is a private investigation agency in Manhattan, NY that offers quality yet affordable service to New York City and Long Island. They specialize in locating people and providing investigative services as well as infidelity investigations. Ace Investigations & Protection Inc. has experienced investigators who ensure professional and confidential service.

New York City, NY 10013


Affiliated Investigations Corp.

Affiliated Investigations Corp. is a licensed and insured company in Queens Village, New York that has been providing investigation and security services for more than 33 years. Their services range from background investigations and evidence gathering to commercial security and executive protection. Affiliated Investigations Corp. is also associated with The Ohio Department of Public Safety and New York State Department of State and has earned an A+ rating with the Better Business Bureau.

Queens Village, NY 11428


Beau Dietl & Associates

Beau Dietl & Associates is a leading private investigation firm based out of New York City that provides fast, discreet and reliable service using the latest information-gathering and security technology. They specialize in investigations and intelligence, insurance, and security. The firm offers a very broad array of services that range from asset recovery to executive protection to polygraph tests. The agency's founder and CEO, Bo Dietl, is a well-known security and investigation expert with many high-profile endorsements and media appearances.

New York City, NY 10119


Gross Investigation Bureau, LLC

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.

244 5th Avenue
New York, NY 10001


International Investigative Group

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.

55 Maple Ave Suite 304
Rockville Centre, NY 11570

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Investigative Solutions LLC

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 10001


Investigreat, LLC

Investigreat LLC is a firm of private investigators based in the Jamaica 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.

168-09 Jamaica Ave - Office B5 Rear Entrance - 2nd...
Jamaica, NY 11432


J.T. Mullen Private Investigator

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.

New York City, NY 10007


JL & Associates, Ltd

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.

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


Long Island Investigations

Long Island Investigations is an investigative and detective agency that has been serving Nassau and Suffolk counties for more than 30 years. Long Island Investigations’ investigators are all former NYPD detectives who are highly skilled, qualified and focused on getting the job done right. The agency specializes in surveillance, matrimonial, pre-marital investigations, private and personal security, and child custody.

Massapequa Park, NY 11762


Manhattan Investigations, LLC

Manhattan Investigations, LLC is an agency in New York City that has been providing investigative services since 2004. They specialize in infidelity investigations, and child support and child welfare investigations, as well as technical and forensic investigations. Manhattan Investigations’ highly qualified investigators are equipped with more than 20 years of investigative experience, and the agency is confident in their abilities, offering clients a money-back 100% satisfaction guarantee.

New York City, NY 10005


New York Investigation Specialists, LLC

New York Investigation Specialists, LLC is a company in Brooklyn, NY that has been providing 100% confidential investigative services for more than 15 years. Their private investigators specialize in surveillance and investigations which include tenant and pre-employment screening as well as criminal history checks. New York Investigation Specialists, LLC's team brings experience, skill, and a comprehensive background that serves each client's needs.

Brooklyn, NY 11229


Your I s Consulting Inc.

Your I s Consulting Inc. has been providing investigative services at competitive prices to clients in New York City, Long Island and Westchester for more than 20 years. Their areas of specialty consist of matrimonial and infidelity investigations, surveillance, litigation support, and child custody. Your I s Consulting Inc. uses state-of-the-art equipment and only employs skilled investigators with 15 years of minimum experience.

Bronx, NY 10461


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