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Find the 176 Best Security Companies in California

Browse 176 security companies serving California, including Los Angeles, San Diego and San Francisco, for home and commercial protection. Review guarding, patrol and security system services, read customer feedback and contact local providers for estimates.
Anaheim (2)
Antioch (1)
Bakersfield (1)
Beverly Hills (1)
Brentwood (1)
Buena Park (1)
Burlingame (2)
Campbell (2)
Carlsbad (1)
Chatsworth (1)
Clovis (1)
Concord (3)
Corona (1)
Costa Mesa (1)
Diamond Bar (1)
Downey (1)
Dublin (1)
El Monte (1)
El Segundo (1)
Encinitas (2)
Escondido (3)
Fairfield (1)
Fremont (1)
Fresno (4)
Fullerton (2)
Gardena (1)
Glendale (4)
Glendora (1)
Hawthorne (1)
Hayward (1)
Irvine (1)
La Habra (1)
La Puente (1)
Laguna Hills (1)
Lakeport (1)
Lakewood (1)
Livermore (2)
Long Beach (1)
Los Alamitos (1)
Los Angeles (15)
Manhattan Beach (1)
Manteca (2)
Martinez (1)
Milpitas (1)
Modesto (1)
Montclair (1)
Morgan Hill (1)
Newport Beach (1)
Oakland (1)
Oakley (1)
Oceanside (1)
Ontario (1)
Orange (2)
Orangevale (1)
Pacifica (1)
Palm Desert (4)
Pasadena (1)
Petaluma (1)
Pleasanton (2)
Rancho Cordova (1)
Rancho Cucamonga (1)
Redding (3)
Redondo Beach (3)
Redwood City (1)
Riverside (4)
Rowland Heights (1)
Sacramento (5)
San Bernardino (2)
San Carlos (2)
San Diego (13)
San Francisco (7)
San Jose (5)
San Marcos (1)
Santa Ana (3)
Santa Barbara (1)
Santa Rosa (1)
Scotts Valley (1)
Sherman Oaks (1)
Signal Hill (1)
Simi Valley (1)
Solana Beach (1)
Stockton (1)
Sunnyvale (2)
Tarzana (1)
Temecula (1)
Thousand Oaks (1)
Torrance (1)
Trabuco Canyon (1)
Twain Harte (1)
Union City (1)
Upland (1)
Vacaville (1)
Valencia (1)
Vallejo (1)
Van Nuys (2)
Ventura (2)
Visalia (1)
Vista (1)
Walnut (1)
Walnut Creek (1)
29 reviews
Security Base Group - Security Guard Company in LA, California
18 Years
Emergency
Open 24/7
29 reviews
Security Guard Services in Los Angeles and other cities of CA
We are providing best security guard services in Los Angeles and other cities of California. We have been delivering the best security guards since 2008 all over California. You can call us anytime.
Armed Security Unarmed Security Event Security
Website (844) 999-9928 Call Profile
Lockology Locksmith
Recommended
16 Years
Emergency
8 reviews
Lockology Locksmith
16 Years
Emergency
8 reviews
We offer 24/7 emergency mobile locksmith services with 30-minute response times.
Lockology Locksmith offers 24/7 emergency locksmith services in Oakland and the East Bay Area, specializing in car key replacement, lock rekeying, and high-security installations.
Car Key Replacement Lock Rekeying Emergency Lockout
Website (510) 899-9271 Call Profile
16 reviews
Yms Services
9 Years
16 reviews
We are a family-owned business with decades of locksmith experience.
YMS Services 24/7 locksmith solutions in Los Angeles. Fast, reliable service for home, auto, and business lockouts, re‑keys, lock changes and more. Call now
(213) 787-4767 Call Profile
2 reviews
Kingz Protection and Security Services
14 Years
2 reviews
We offer 100% service guarantee
You are looking for Security Guard Services. We are a Black-Owned, licensed, and insured security company serving Southern California.
(424) 430-6008 Call Profile
Not rated yet
Brass Key Locksmith
37 Years
Emergency
Not rated yet
We have 35 years of experience in commercial, residential, and automotive locksmith services.
Trusted locksmith services in Santa Cruz offering high-security locks, access control systems, transponder key programming, and emergency assistance for businesses, homes, and vehicles.
Commercial Locksmith Residential Locks Automotive Key Programming
(831) 438-4904 Call Profile
Not rated yet
AHC Alarms
Not rated yet
We are the only ADT Authorized Dealer in Coachella Valley.
Experience 25+ years of local expertise with the Coachella Valley's only ADT Authorized Dealer for custom security, fire, and smart home systems.
Residential Security Systems Fire and CO2 Alarms Smart Home Automation
(760) 797-7274 Call Profile
Not rated yet
Golden Gate Burglar Alarm
Emergency
Not rated yet
We offer over 50 years of experience in security system installations.
Golden Gate Burglar Alarm Co. offers advanced security systems, including alarms, cameras, and 24/7 monitoring, ensuring safety for homes and businesses in the San Francisco Bay Area.
Security Systems Video Cameras Access Control
(415) 285-1787 Call Profile
Not rated yet
Smart Shield Systems
Emergency
Open 24/7
Not rated yet
Local San Diego expertise with neighborhood-specific security knowledge
Smart Shield Systems offers advanced security systems in San Diego, including alarms, surveillance, smart locks, and 24/7 monitoring for homes and businesses. Locally owned and operated.
Alarm Systems Video Surveillance Access Control
(844) 477-7627 Call Profile
Not rated yet
Direct Protection
21 Years
Not rated yet
We offer 20+ years of technical expertise in alarm system installation
Protect your home with Direct Protection's customized security solutions. 20+ years of expert installation, 2,000+ satisfied clients, and technician-led service in San Jose, CA.
Home Security Systems Wireless Systems Hardwired Systems
(408) 835-3778 Call Profile
A-Bell Alarms
41 Years
Emergency
Open 24/7
Not rated yet
A-Bell Alarms
41 Years
Emergency
Open 24/7
Not rated yet
Over 50 years of combined experience in security systems
Secure your home or business with A-Bell Alarms' customized security solutions in Temecula, CA. Over 50 years of experience, 24/7 monitoring, and personalized service for residential and commercial clients.
Home Security Systems Business Security Systems 24/7 Monitoring
(951) 302-3100 Call Profile