Best Private Investigators in Ontario, CA

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  • Private Detective

    Riverside, CA · LP Solutions Private Investigations

    Hire private investigators from LP Solutions Private Investigations if you need including background checks, cold cases and many more. They handle divorce and child custody investigations as well.

    5/5 stars 15 reviews · 12 credentials · Licensed in CA

  • PI Services

    Glendale, CA · JD Stone Agency

    This detective agency has been providing investigative services since 2002. They do background checks, cheating spouse and wrongful death investigations, serial claims, and more.

    4/5 stars 10 reviews · 8 credentials · $35-75 / hour · Licensed in CA

  • Detective Agency

    Ontario, CA · Corinthian Group

    Corinthian Group offers private security services by handling discreet and well-managed cases. This firm also specializes in undercover operations, pre-matrimonial investigations, and more.

    9 credentials · $85-125 / hour

  • Security Services

    Laguna Niguel, CA · Constantia Group

    We provide security services, training and investigators to suit a wide variety of needs. Some of our specialties are event, red carpet,...

    5/5 stars 1 review · 9 credentials · Licensed in CA

  • Legal Services

    Beverly Hills, CA · Brignac Paralegal Contracting Services, LLC.

    Do a background check and clear the doubt by hiring this company's investigative services. These private investigators also provide legal research and consultations, and more.

    6 credentials

  • Private Investigation Services & Fugitive Recovery

    Los Angeles, CA · U.N.I.T. 07 / Archer Investigations

    Hire private investigators from U.N.I.T.07 / Archer Investigations. They have a combined 25 years experience in investigations. They do background checks, security services consulting, and more.

    5/5 stars 2 reviews · 5 credentials · $50-150 / hour

  • Private Investigator & Registered Process Server

    Santa Ana, CA · New Technologies Investigative Services

    New Technologies Investigative Services handles all types of registered process server and private investigator jobs. They take care of small claims, civil documents, and more.

    4 credentials · $85-150 / hour · Licensed in CA

  • Security & Investigations

    Beverly Hills, CA · SIB Investigations

    SIB Investigations is a licensed private detective company that has been offering private investigation services, as well as estate and construction security, and workers investigation since 1999.

    3 credentials · $35-75 / hour

  • Professional Private Investigators

    Claremont, CA · O&O Investigations

    This company handles private investigator jobs that include asset searches and locates, background checks and more. Their private eyes use professional-grade equipment to meet your expectations.

    4 credentials · $75 / hour

  • Security Investigation Agency

    Signal Hill, CA · Long Beach ICS of California

    This company is a security investigation agency that offers 24/7 surveillance services. Their private eyes also do background checks and infidelity investigation.

    3 credentials

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