2026 Ranking
Best Security Companies in Fairfield
Ranking of the best private security companies in Fairfield, 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 36 companies in Fairfield
We're still gathering recommendations and verified customer reviews in Fairfield. In the meantime, the order is based on license status and profile views.
Top-ranked companies in Fairfield
- 1Licensed
- 2Licensed
- 3Licensed
- 4Licensed
- 5Licensed
- 6Licensed
- 7Licensed
- 8Licensed
- 9Licensed
- 10Licensed
All state licensed security companies in Fairfield
36 companies with a verified, active state license, ranked by track record and reputation. All checked against official license records.
- 11DMSANDOVAL INVESTIGATIONS State Licensed· Private Investigation
- 12DOUBLE "A" INVESTIGATIONS State Licensed· Private Investigation
- 13DYNASEC PROTECTION State Licensed· Executive Protection
- 14EFFECTIVE MEASURES, INC. State Licensed· Security Guards
- 15EVANS INVESTIGATIVE SERVICES State Licensed· Private Investigation
- 16FENN CONSULTING AND INVESTIGATIONS State Licensed· Security Consulting
- 17FIVE STAR PROTECTION AGENCY INC. State Licensed· Security Guards
- 18GREGORY M UNDERWOOD, PRIVATE INVESTIGATOR State Licensed· Private Investigation
- 19GROUND BRANCH SECURITY GROUP (GBSG) State Licensed· Security Guards
- 20IRON TRIANGLE INVESTIGATIVE SERVICES State Licensed· Private Investigation
- 21J-AA SYSTEMS COMM SEC State Licensed· Alarm Monitoring
- 22J. D. NANNERY INVESTIGATIONS State Licensed· Private Investigation
- 23JOSHUA SECURITY SERVICES State Licensed· Security Guards
- 24JWK INVESTIGATIONS State Licensed· Private Investigation
- 25KDBELK INVESTIGATIONS State Licensed· Private Investigation
- 26LINEHAN INVESTIGATIVE SERVICES State Licensed· Private Investigation
- 27MASSENKOFF INVESTIGATIONS State Licensed· Private Investigation
- 28MILES PRIVATE SECURITY & EXECUTIVE PROTECTION State Licensed· Security Guards
- 29NORCAL PRIVATE PROTECTION State Licensed· Security Guards
- 30PARADISE INVESTIGATIONS State Licensed· Private Investigation
- 31PARODI INVESTIGATION SERVICES State Licensed· Private Investigation
- 32PARODI INVESTIGATIVE SOLUTIONS LLC State Licensed· Private Investigation
- 33RAFFERTY INVESTIGATIONS State Licensed· Private Investigation
- 34SIMS PROTECTIVE SERVICES State Licensed· Security Guards
- 35SUPERB SECURITY SOLUTIONS AND SERVICES State Licensed· Security Guards
- 36WILLIS INVESTIGATIONS State Licensed· Private Investigation
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 Fairfield?
Browse the complete directory with all 36 private security companies listed in Fairfield, filter by service type and compare pricing.
View full directorySecurity services in Fairfield
Security Guards en FairfieldArmed Security Guards en FairfieldMobile Patrol en FairfieldEvent Security en FairfieldFire Watch Services en FairfieldExecutive Protection en FairfieldK9 Security en FairfieldLoss Prevention & Retail Security en FairfieldCorporate Security en FairfieldWarehouse & Industrial Security en FairfieldResidential & HOA Security en FairfieldConstruction Site Security en FairfieldAlarm Monitoring en FairfieldVideo Surveillance & CCTV en FairfieldAccess Control en FairfieldPrivate Investigation en FairfieldArmored Transport & Cash-in-Transit en FairfieldSecurity Consulting en Fairfield
More about private security in Fairfield
Directory of FairfieldAll security companies, with search and pagination.State Licensed in FairfieldOnly companies with an active state license.
See all security companies in CaliforniaFrequently asked questions
What are the best private security companies in Fairfield?
Top companies in Fairfield include ANVIL SECURITY SERVICES, ARROYO INVESTIGATIONS, AVF SYSTEMS INC., BALIBREA SECURITY AND INVESTIGATIONS, BORGHELLO 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 Fairfield 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 Fairfield?
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 Fairfield?
Our directory lists 36 companies in Fairfield, California. You can browse the complete list in the Fairfield security companies directory.