Best Private Investigators in Chicago

Why These Private Investigators?

Our goal is to connect people with the best local experts. We scored Chicago 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 691 420 14

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

Illinois Investigative Solutions

Illinois Investigative Solutions is a client oriented private investigative agency in Naperville offering a range of services including matrimonial cases, due diligence, criminal, civil, workers compensation, and attorney support. Other services provided by the agency include locating missing persons and technical surveillance counter measures. The owner and chief investigator of the agency was an investigator with the United States Army Criminal Investigation Division Drug Suppression Team, where he was awarded the Army Achievement Medal for his contributions.

Naperville, IL 60540


Mid-West Protective Service

Mid-West Protective Service offers an array of protective, investigative and security services in Chicago and opened in 1993. The agency’s services include private investigations, surveillance, polygraph and lie detector exams, bodyguard services, security, eavesdropping, countermeasures, and security consulting. The agency’s president has over 30 years experience in law enforcement, private investigations, and security. The firm is a member of the American Polygraph Association, the Law Enforcement Alliance of America, the National Association of Investigative Specialists, and the National Association of Legal Investigators.

Chicago, IL 60641


Northshore Process Service Network

Northshore Process Service Network in Chicago, Illinois, is a private investigation firm offering its services to residents and business owners throughout the greater Chicago area. Doing business for more than a quarter-century, the firm offers an array of services, including workplace and theft investigations, surveillance, process service, pre-marital and pre-employment searches and screenings, and judgment recovery. It also takes on insurance claims investigations, juror screenings, activity checks, adultery/cheating investigations, and asset searches.

70 West Madison St
Chicago, IL 60602


Subrosa Investigations

Subrosa Investigations is a private investigative agency in Glenview offering litigation support to attorneys and insurance companies, enhanced background checks for private equity, fund of funds, hedge funds and institutional investors, pre-employment background checks for multi-national corporations, and intellectual property and trademark enforcement for the retail sector. The agency is a member of the National Council of Investigation and Security Services, the Arizona Association of Licensed Private Investigation and the Special Agents Association.

Glenview, IL 60025


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