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2026 Ranking

Best Security Companies in Rancho Cucamonga

Ranking of the best private security companies in Rancho Cucamonga, California. The order prioritizes verified state licensing, track record and verified reviews; profile views and recommendations only fine-tune the order.

Verified state license Real user views 76 companies in Rancho Cucamonga

We're still gathering recommendations and verified customer reviews in Rancho Cucamonga. In the meantime, the order is based on license status and profile views.

Top-ranked companies in Rancho Cucamonga

  1. 1
    AS

    A-SOURCE SECURITY SERVICES

    State Licensed
    Rancho Cucamonga
    Security GuardsEvent SecurityResidential & HOA Security+7
    Get quotes in Rancho Cucamonga
    Licensed
  2. 2
    AC

    A. C. INVESTIGATIONS

    State Licensed
    Rancho Cucamonga
    Private Investigation
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    Licensed
  3. 3
    AS

    ACCELERATED SECURITY AND TRAINING SERVICES INC.

    State Licensed
    Rancho Cucamonga
    Security GuardsEvent SecurityResidential & HOA Security+7
    Get quotes in Rancho Cucamonga
    Licensed
  4. 4
    AD

    ACCREDITED DOMESTIC INVESTIGATIONS

    State Licensed
    Rancho Cucamonga
    Private Investigation
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    Licensed
  5. 5
    AF

    ADVANTAGE FIRE INVESTIGATIONS

    State Licensed
    Rancho Cucamonga
    Private Investigation
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    Licensed
  6. 6
    AC

    ALAN C TODD INVESTIGATIONS

    State Licensed
    Rancho Cucamonga
    Private Investigation
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    Licensed
  7. 7
    AS

    ALERTONE SERVICE, INC.

    State Licensed
    Rancho Cucamonga
    Alarm MonitoringVideo Surveillance & CCTVAccess Control
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    Licensed
  8. 8
    AD

    ALLEN DETECTIVE AGENCY

    State Licensed
    Rancho Cucamonga
    Private Investigation
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    Licensed
  9. 9
    AT

    AMERICAN THREAT ASSESSMENT CONSULTING INC

    State Licensed
    Rancho Cucamonga
    Alarm MonitoringSecurity ConsultingVideo Surveillance & CCTV+1
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    Licensed
  10. 10
    AI

    AVI INVESTIGATIONS

    State Licensed
    Rancho Cucamonga
    Private Investigation
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    Licensed

All state licensed security companies in Rancho Cucamonga

76 companies with a verified, active state license, ranked by track record and reputation. All checked against official license records.

  1. 11BLA INVESTIGATION & SECURITY State Licensed· Security Guards
  2. 12BLUE LINE PROTECTION SERVICES PATROL State Licensed· Security Guards
  3. 13BLUELINE SECURITY SERVICES State Licensed· Security Guards
  4. 14BRENNAN INVESTIGATIONS State Licensed· Private Investigation
  5. 15CAPITAL CORPORATION INTERNATIONAL, INC State Licensed· Private Investigation
  6. 16CHEXMATE INVESTIGATIONS State Licensed· Private Investigation
  7. 17CROWN POINTE INVESTIGATIONS, LLC State Licensed· Private Investigation
  8. 18CS INVESTIGATIVE SERVICES INC. State Licensed· Private Investigation
  9. 19CSPS COMPLETE SECURITY & PATROL SERVICES State Licensed· Security Guards
  10. 20D T N INVESTIGATIONS State Licensed· Private Investigation
  11. 21DELICE EXECUTIVE PROTECTION State Licensed· Security Guards
  12. 22DG GARCIA INVESTIGATIONS State Licensed· Private Investigation
  13. 23DISTRICT & CHARTER PATROL State Licensed· Security Guards
  14. 24ECHO SOLUTIONS State Licensed· Private Investigation
  15. 25ED GAON P. I. State Licensed· Private Investigation
  16. 26ELITE INVESTIGATION SERVICES State Licensed· Private Investigation
  17. 27ENLIGHTENED INVESTIGATIONS State Licensed· Private Investigation
  18. 28ERIC CAMPOS State Licensed· Private Investigation
  19. 29ERIC WALTERSCHEID INVESTIGATIONS State Licensed· Private Investigation
  20. 30FACTPROOF SOLUTIONS State Licensed· Private Investigation
  21. 31FIRST SHIELD SERVICES CORPORATION State Licensed· Security Guards
  22. 32G & N INVESTIGATIVE/SURVEILLANCE SPECIALISTS State Licensed· Private Investigation
  23. 33GCI State Licensed· Security Guards
  24. 34GLEN COZART INVESTIGATIONS, INC. (AKA) GCI, INC. State Licensed· Private Investigation
  25. 35IMPERIAL PRIVATE SECURITY SERVICES, INC. State Licensed· Security Guards
  26. 36INGELS INVESTIGATIONS State Licensed· Private Investigation
  27. 37INNOVATIVE INVESTIGATIONS, INC State Licensed· Private Investigation
  28. 38INTEGRITY ENTERPRISES State Licensed· Private Investigation
  29. 39ISMG State Licensed· Private Investigation
  30. 40J & A GROUP SERVICES INC State Licensed· Security Guards
  31. 41J3 PROTECTIVE SERVICES State Licensed· Security Guards
  32. 42JENNY ARTIGA, P.I. State Licensed· Private Investigation
  33. 43JID SECURITY SERVICES INC State Licensed· Alarm Monitoring
  34. 44JLR INVESTIGATIONS State Licensed· Private Investigation
  35. 45JOE MAR POLYGRAPH & INVESTIGATION SERVICES, INC State Licensed· Private Investigation
  36. 46K V SERVICES State Licensed· Private Investigation
  37. 47LINCOLN CLAIM CONSULTANTS State Licensed· Security Consulting
  38. 48LIVING WATERS INVESTIGATION AND PROTECTION, LLC State Licensed· Executive Protection
  39. 49LOGISTICS SECURITY, INC. State Licensed· Security Guards
  40. 50MV INVESTIGATIONS State Licensed· Private Investigation
See the remaining 26 licensed companies in the directory

Ranking methodology

The order reflects real, verifiable signals that are hard to manipulate. Companies with a verified state license appear first; within that group we prioritize the best-reviewed (verified reviews) and the most established according to official records. Profile views and community recommendations only fine-tune the order — a couple of votes can't move positions. For each company we show exactly which signals back its position.

  • State license — we verify each active license against state licensing boards like California BSIS and Illinois IDFPR. Licensed companies appear first.
  • Real profile views — how many people viewed the company's profile over the last 30 days.
  • Community recommendations — user votes with anti-fraud controls (fingerprint dedup).
  • Verified customer reviews — customer rating and review volume, when available.

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Security services in Rancho Cucamonga

Security Guards en Rancho CucamongaArmed Security Guards en Rancho CucamongaMobile Patrol en Rancho CucamongaEvent Security en Rancho CucamongaFire Watch Services en Rancho CucamongaExecutive Protection en Rancho CucamongaK9 Security en Rancho CucamongaLoss Prevention & Retail Security en Rancho CucamongaCorporate Security en Rancho CucamongaWarehouse & Industrial Security en Rancho CucamongaResidential & HOA Security en Rancho CucamongaConstruction Site Security en Rancho CucamongaAlarm Monitoring en Rancho CucamongaVideo Surveillance & CCTV en Rancho CucamongaAccess Control en Rancho CucamongaPrivate Investigation en Rancho CucamongaArmored Transport & Cash-in-Transit en Rancho CucamongaSecurity Consulting en Rancho Cucamonga

More about private security in Rancho Cucamonga

Directory of Rancho CucamongaAll security companies, with search and pagination.State Licensed in Rancho CucamongaOnly companies with an active state license.
See all security companies in California

Frequently asked questions

What are the best private security companies in Rancho Cucamonga?
Top companies in Rancho Cucamonga include A-SOURCE SECURITY SERVICES, A. C. INVESTIGATIONS, ACCELERATED SECURITY AND TRAINING SERVICES INC., ACCREDITED DOMESTIC INVESTIGATIONS, ADVANTAGE FIRE INVESTIGATIONS, based on their active state license and the volume of profile views and community recommendations on HireSecurityNow.com. The order updates continuously based on these signals.
How is the ranking of security companies in Rancho Cucamonga determined?
Companies with a verified, active state license appear first, checked against official licensing board records like California BSIS and Illinois IDFPR. Within that group, the order reflects real profile views over the last 30 days, community recommendations (with anti-fraud controls) and verified customer reviews when available.
Are the ranked companies state licensed?
We verify each company's license status against official state licensing board records. Each company's profile shows its license number and status when it holds an active license.
How do I hire one of these companies in Rancho Cucamonga?
You can get free quotes from any company in the ranking: open its profile, submit a quote request with your requirements and you'll receive proposals directly. All quotes are free and come with no obligation.
How many security companies are listed in Rancho Cucamonga?
Our directory lists 76 companies in Rancho Cucamonga, California. You can browse the complete list in the Rancho Cucamonga security companies directory.