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2026 Ranking

Best Security Companies in Ontario

Ranking of the best private security companies in Ontario, 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 42 companies in Ontario

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

Top-ranked companies in Ontario

  1. 1
    AS

    A&L SYSTEMS LLC

    State Licensed
    Ontario
    Alarm MonitoringVideo Surveillance & CCTVAccess Control
    Get quotes in Ontario
    Licensed
  2. 2
    AA

    ABOVE ALL SECURITY

    State Licensed
    Ontario
    Security GuardsEvent SecurityResidential & HOA Security+7
    Get quotes in Ontario
    Licensed
  3. 3
    AM

    ADVANCED MONITORING, INC.

    State Licensed
    Ontario
    Alarm MonitoringVideo Surveillance & CCTVAccess Control
    Get quotes in Ontario
    Licensed
  4. 4
    AD

    ALAN D. WAPNER

    State Licensed
    Ontario
    Private Investigation
    Get quotes in Ontario
    Licensed
  5. 5
    AC

    ALL CASES INVESTIGATIVE SERVICES

    State Licensed
    Ontario
    Private Investigation
    Get quotes in Ontario
    Licensed
  6. 6
    AV

    ALWAYS VIGILANT INVESTIGATIVE SERVICES

    State Licensed
    Ontario
    Private Investigation
    Get quotes in Ontario
    Licensed
  7. 7
    AP

    AMETHYST PROTECTIVE SERVICES, INC

    State Licensed
    Ontario
    Security GuardsEvent SecurityResidential & HOA Security+7
    Get quotes in Ontario
    Licensed
  8. 8
    AF

    ANDY FRAIN SERVICES

    State Licensed
    Ontario
    Security GuardsEvent SecurityResidential & HOA Security+7
    Get quotes in Ontario
    Licensed
  9. 9
    D&

    D & R PROTECTION SYSTEMS

    State Licensed
    Ontario
    Executive ProtectionAlarm MonitoringVideo Surveillance & CCTV+1
    Get quotes in Ontario
    Licensed
  10. 10
    DI

    DICKINSON INVESTIGATIONS

    State Licensed
    Ontario
    Private Investigation
    Get quotes in Ontario
    Licensed

All state licensed security companies in Ontario

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

  1. 11EASTERN EAGLE INVESTIGATIVE SERVICES State Licensed· Private Investigation
  2. 12G & G SECURITY INC State Licensed· Security Guards
  3. 13GRUNT PI State Licensed· Private Investigation
  4. 14HAYWOOD INVESTIGATIVE SERVICES State Licensed· Private Investigation
  5. 15HAYWOOD SECURITY SOLUTIONS State Licensed· Security Guards
  6. 16HCI SYSTEMS, INC. State Licensed· Alarm Monitoring
  7. 17ICSA , INC State Licensed· Private Investigation
  8. 18INTEGRITY SECURITY PATROL SERVICES State Licensed· Security Guards
  9. 19JOHNNY H GARCIA State Licensed· Private Investigation
  10. 20JP INVESTIGATIVE SOLUTIONS State Licensed· Private Investigation
  11. 21KINGDOM RISK MITIGATION SERVICES INC State Licensed· Security Guards
  12. 22KINGSMEN INVESTIGATIONS AND SECURITY State Licensed· Private Investigation
  13. 23KINGZ PROTECTION AND SECURITY SERVICES State Licensed· Security Guards
  14. 24MARTINEZ & ASSOCIATES State Licensed· Private Investigation
  15. 25MORITZ INVESTIGATIONS State Licensed· Private Investigation
  16. 26NWIS State Licensed· Private Investigation
  17. 27PLATINUM GROUP PROTECTION State Licensed· Security Guards
  18. 28R A M SECURITY State Licensed· Alarm Monitoring
  19. 29REACTIVE PATROL SERVICES State Licensed· Security Guards
  20. 30S. W. CROSS & ASSOCIATES INVESTIGATIONS State Licensed· Private Investigation
  21. 31SCOTT INVESTIGATION SERVICES State Licensed· Private Investigation
  22. 32SECUTORS PRTCTV & INVSTGTV SRVCS State Licensed· Private Investigation
  23. 33SMG INVESTIGATIONS State Licensed· Private Investigation
  24. 34STEVEN D KALLA State Licensed· Private Investigation
  25. 35T. RAMOS AND ASSOCIATES State Licensed· Private Investigation
  26. 36THIRD SHIFT SECURITY State Licensed· Security Guards
  27. 37TRICE TOP TIER SECURITY State Licensed· Security Guards
  28. 38TRITON GLOBAL SERVICES, INC. State Licensed· Alarm Monitoring
  29. 39VALENCIA DETECTIVE AGENCY State Licensed· Private Investigation
  30. 40WESLEY GLOBAL ASSOCIATES, INC. State Licensed· Private Investigation
  31. 41WINN ENTERPRISES State Licensed· Private Investigation
  32. 42X-TREME SECURITY SERVICES, INC. State Licensed· Security Guards

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.

Looking for more options in Ontario?

Browse the complete directory with all 42 private security companies listed in Ontario, filter by service type and compare pricing.

View full directory

Security services in Ontario

Security Guards en OntarioArmed Security Guards en OntarioMobile Patrol en OntarioEvent Security en OntarioFire Watch Services en OntarioExecutive Protection en OntarioK9 Security en OntarioLoss Prevention & Retail Security en OntarioCorporate Security en OntarioWarehouse & Industrial Security en OntarioResidential & HOA Security en OntarioConstruction Site Security en OntarioAlarm Monitoring en OntarioVideo Surveillance & CCTV en OntarioAccess Control en OntarioPrivate Investigation en OntarioArmored Transport & Cash-in-Transit en OntarioSecurity Consulting en Ontario

More about private security in Ontario

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

Frequently asked questions

What are the best private security companies in Ontario?
Top companies in Ontario include A&L SYSTEMS LLC, ABOVE ALL SECURITY, ADVANCED MONITORING, INC., ALAN D. WAPNER, ALL CASES INVESTIGATIVE SERVICES, 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 Ontario 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 Ontario?
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 Ontario?
Our directory lists 42 companies in Ontario, California. You can browse the complete list in the Ontario security companies directory.