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Best Security System in California (2026)

79 businesses found · Ranked by quality, not ads

Find top-rated security system businesses in California. Every business is ranked by Quality Score — our quality metric based on responsiveness, data completeness, and verified reviews. Not who pays the most.

Alert 360 Home & Business Security Los Angeles

Corona, CA

Security System

★ 4.9(629 reviews)

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Zions Security Alarms

Santa Monica, CA

Security System

★ 4.8(60 reviews)

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Los Angeles Professional Security, Alarm & Video Monitoring

Los Angeles, CA

Security System

★ 3.2(9 reviews)

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Surveillance Systems L.A

South Gate, CA

Security System

★ 5.0(104 reviews)

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TCI Security Cameras

La Mirada, CA

Security System

★ 5.0(25 reviews)

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Alert 360 Home & Business Security San Diego

San Diego, CA

Security System

★ 4.8(156 reviews)

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Real Home Security, LLC- Authorized ADT Dealer

San Diego, CA

Security System

★ 4.9(148 reviews)

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First Tech Networks

San Francisco, CA

Security System

★ 4.9(35 reviews)

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AVS

San Francisco, CA

Security System

★ 4.6(10 reviews)

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Security 101 - San Francisco Bay Area

Pleasanton, CA

Security System

★ 4.9(29 reviews)

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Bay Alarm Company

South San Francisco, CA

Security System

★ 3.3(16 reviews)

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International Spy Shop

San Francisco, CA

Security System

★ 4.3(409 reviews)

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Five Alarm Security

Carlsbad, CA

Security System

★ 4.4(37 reviews)

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ASAP Security Guards

San Diego, CA

Security System

★ 4.4(67 reviews)

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Silverstrand Technologies, Inc.

El Cajon, CA

Security System

★ 4.9(29 reviews)

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Safety Zone Security, Inc. - San Diego

San Diego, CA

Security System

★ 5.0(4 reviews)

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Zions Security Alarms

El Cajon, CA

Security System

★ 4.9(56 reviews)

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Elite Security & Surveillance

El Cajon, CA

Security System

★ 5.0(3 reviews)

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ADT Security Services

San Jose, CA

Security System

★ 4.8(497 reviews)

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Safety Zone Security, Inc. - San Jose

San Jose, CA

Security System

★ 4.9(28 reviews)

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ADT Security Services

San Jose, CA

Security System

★ 4.2(10 reviews)

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Borges Security Systems, Inc.

San Jose, CA

Security System

★ 4.2(10 reviews)

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VP Security Services Inc.

San Jose, CA

Security System

★ 4.9(175 reviews)

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MP Security Cameras

San Jose, CA

Security System

★ 4.6(12 reviews)

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CSI Security

Los Angeles, CA

Security System

★ 4.9(98 reviews)

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HM Security - ADT Authorized Dealer

Downey, CA

Security System

★ 5.0(832 reviews)

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ACS Security

Los Angeles, CA

Security System

★ 4.4(358 reviews)

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SSD Alarm

San Diego, CA

Security System

★ 5.0(8 reviews)

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TAPS Security and Alarm

San Jose, CA

Security System

★ 5.0(4 reviews)

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Delta Alarm

San Jose, CA

Security System

★ 3.7(3 reviews)

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Security 101 - San Jose

Santa Clara, CA

Security System

★ 5.0(23 reviews)

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Choice Alarm

Los Angeles, CA

Security System

★ 4.1(20 reviews)

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Rigility Surveillance Solutions SF

San Francisco, CA

Security System

★ 5.0(9 reviews)

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Swiftlane

San Francisco, CA

Security System

★ 4.5(899 reviews)

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Allied Security Alarms

South San Francisco, CA

Security System

★ 3.7(3 reviews)

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Ace Alarm, Inc.

Los Angeles, CA

Security System

★ 4.4(37 reviews)

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Safe and Sound Security

Los Angeles, CA

Security System

★ 5.0(15 reviews)

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Secure Zone

Los Angeles, CA

Security System

★ 5.0(17 reviews)

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Cyber Shield Security

Los Angeles, CA

Security System

★ 4.8(24 reviews)

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Allied International Security Guards Company

Los Angeles, CA

Security System

★ 4.9(91 reviews)

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Security Cameras Installation Los Angeles

Gardena, CA

Security System

★ 3.9(7 reviews)

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Valley Alarm - Access Control | Fire System | Intrusion Detection | CCTV Service | Remote Video Monitoring

San Fernando, CA

Security System

★ 4.8(306 reviews)

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Optimum Surveillance

Los Angeles, CA

Security System

★ 5.0(69 reviews)

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DVRS, Inc.

Los Angeles, CA

Security System

★ 5.0(96 reviews)

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VP Security Guards

Los Angeles, CA

Security System

★ 5.0(102 reviews)

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SCSCCTV Surveillance Camera installation Los Angeles

Los Angeles, CA

Security System

★ 4.9(32 reviews)

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Safe and Sound Security

San Francisco, CA

Security System

★ 4.9(34 reviews)

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Safe and Sound Security

Oakland, CA

Security System

★ 4.8(65 reviews)

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Armada Mobile Security Patrol

San Francisco, CA

Security System

★ 5.0(20 reviews)

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VP Security Guards

San Francisco, CA

Security System

★ 5.0(33 reviews)

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