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2026 Ranking

Best Security Companies in Long Island

Ranking of the best private security companies in Long Island, New York. 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 894 companies in Long Island

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

Top-ranked companies in Long Island

  1. 1
    1S

    1091 SECURITY SERVICES INC

    State Licensed
    Long Island
    Security GuardsEvent SecurityResidential & HOA Security+7
    Get quotes in Long Island
    Licensed
  2. 2
    1L

    1ST LINE PROTECTION INC

    State Licensed
    Long Island
    Security GuardsExecutive ProtectionEvent Security+8
    Get quotes in Long Island
    Licensed
  3. 3
    2L

    2 LED PROTECTIVE SERVICES LLC

    State Licensed
    Long Island
    Private Investigation
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    Licensed
  4. 4
    2C

    21ST CENTURY SECURITY INC

    State Licensed
    Long Island
    Security GuardsEvent SecurityResidential & HOA Security+7
    Get quotes in Long Island
    Licensed
  5. 5
    3S

    3M SECURITY LLC

    State Licensed
    Long Island
    Private Investigation
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    Licensed
  6. 6
    4P

    4 POINTS SECURITY GROUP INC

    State Licensed
    Long Island
    Security GuardsEvent SecurityResidential & HOA Security+7
    Get quotes in Long Island
    Licensed
  7. 7
    4S

    4B SECURITY

    State Licensed
    Long Island
    Security GuardsEvent SecurityResidential & HOA Security+7
    Get quotes in Long Island
    Licensed
  8. 8
    4S

    4E SECURITY INC

    State Licensed
    Long Island
    Security GuardsEvent SecurityResidential & HOA Security+7
    Get quotes in Long Island
    Licensed
  9. 9
    7S

    7SECURE

    State Licensed
    Long Island
    Security GuardsEvent SecurityResidential & HOA Security+7
    Get quotes in Long Island
    Licensed
  10. 10
    A&

    A & C SECURITY SERVICE INC

    State Licensed
    Long Island
    Security GuardsEvent SecurityResidential & HOA Security+7
    Get quotes in Long Island
    Licensed

All state licensed security companies in Long Island

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

  1. 11A C ROMAN & ASSOCIATES INC State Licensed· Private Investigation
  2. 12A. TITUS CONSULTING LLC State Licensed· Security Consulting
  3. 13A2Z INVESTIGATIONS INC State Licensed· Private Investigation
  4. 14AAA EYE SPY ASSOCIATES INC State Licensed· Private Investigation
  5. 15AACS OF LI INC State Licensed· Private Investigation
  6. 16ABBRUZZESE MICHAEL State Licensed· Private Investigation
  7. 17ABITABILE KATHLEEN M State Licensed· Private Investigation
  8. 18ABIUSO SALVATORE M JR State Licensed· Private Investigation
  9. 19ABSOLUTE DISCRETION INVESTIGATIONS LLC State Licensed· Private Investigation
  10. 20ABSOLUTE INVESTIGATIONS LLC State Licensed· Private Investigation
  11. 21ABSOLUTE PRIVATE INVESTIGATIONS LLC State Licensed· Private Investigation
  12. 22ABSOLUTE RESEARCH SOLUTIONS LLC State Licensed· Private Investigation
  13. 23ACE SHARP EYES SECURITY INC State Licensed· Security Guards
  14. 24ACQUISITION SECURITY GROUP LLC State Licensed· Security Guards
  15. 25ACTS-AVIATION SECURITY, INC. State Licensed· Security Guards
  16. 26ADMIRAL ISLE LLC State Licensed· Private Investigation
  17. 27ADVANCED PROACTIVE SOLUTIONS State Licensed· Private Investigation
  18. 28ADVANCED SECURITY LLC State Licensed· Security Guards
  19. 29ADVANTAGE INVESTIGATIONS, LLC State Licensed· Private Investigation
  20. 30AG SECURITY GROUP INC. State Licensed· Security Guards
  21. 31AHG SECURITY SERVICES State Licensed· Security Guards
  22. 32ALACRITY INVESTIGATIONS & CONSULTING SERVICES State Licensed· Security Consulting
  23. 33ALAN J SCHAEFER State Licensed· Private Investigation
  24. 34ALANTE SECURITY GROUP INC State Licensed· Private Investigation
  25. 35ALB SECURITY INC State Licensed· Security Guards
  26. 36ALFAONE SECURITY INC State Licensed· Security Guards
  27. 37ALH PROTECTIVE SERVICES INC State Licensed· Security Guards
  28. 38ALL BUSINESS MANAGEMENT LLC State Licensed· Private Investigation
  29. 39ALL COUNTY INVESTIGATIONS INC State Licensed· Private Investigation
  30. 40ALL EYES INVESTIGATIONS State Licensed· Private Investigation
  31. 41ALL ISLAND INVESTIGATIONS NY INC State Licensed· Private Investigation
  32. 42ALL PRIVATE INVESTIGATIONS LLC State Licensed· Private Investigation
  33. 43ALLEN INVESTIGATIONS INC State Licensed· Private Investigation
  34. 44ALLIED RISK MANAGEMENT INC State Licensed· Security Consulting
  35. 45ALLIED UNIVERSAL COMPLIANCE AND INVESTIGATIONS I State Licensed· Private Investigation
  36. 46ALLIED UNIVERSAL SECURITY SERVICES State Licensed· Security Guards
  37. 47ALLIEDINVESTIGATIONS,SECURITY&CONSULTINGGROUPINC State Licensed· Security Consulting
  38. 48ALPHA GROUP State Licensed· Private Investigation
  39. 49ALPHA OMEGA CONSULTING INC State Licensed· Security Consulting
  40. 50ALPHA PROTECTION AND LOGISTICS LLC State Licensed· Security Guards
See the remaining 844 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.

Looking for more options in Long Island?

Browse the complete directory with all 894 private security companies listed in Long Island, filter by service type and compare pricing.

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Security services in Long Island

Security Guards en Long IslandArmed Security Guards en Long IslandMobile Patrol en Long IslandEvent Security en Long IslandFire Watch Services en Long IslandExecutive Protection en Long IslandK9 Security en Long IslandLoss Prevention & Retail Security en Long IslandCorporate Security en Long IslandWarehouse & Industrial Security en Long IslandResidential & HOA Security en Long IslandConstruction Site Security en Long IslandAlarm Monitoring en Long IslandVideo Surveillance & CCTV en Long IslandAccess Control en Long IslandPrivate Investigation en Long IslandArmored Transport & Cash-in-Transit en Long IslandSecurity Consulting en Long Island

More about private security in Long Island

Directory of Long IslandAll security companies, with search and pagination.State Licensed in Long IslandOnly companies with an active state license.
See all security companies in New York

Frequently asked questions

What are the best private security companies in Long Island?
Top companies in Long Island include 1091 SECURITY SERVICES INC, 1ST LINE PROTECTION INC, 2 LED PROTECTIVE SERVICES LLC, 21ST CENTURY SECURITY INC, 3M SECURITY LLC, 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 Long Island 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 Long Island?
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 Long Island?
Our directory lists 894 companies in Long Island, New York. You can browse the complete list in the Long Island security companies directory.