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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.

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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Alert 360 Home & Business Security Los Angeles

Corona, CA

Security System

★ 4.9(629 reviews)

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AVS

San Francisco, CA

Security System

★ 4.6(10 reviews)

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Bay Alarm Company

South San Francisco, CA

Security System

★ 3.3(16 reviews)

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ASAP Security Guards

San Diego, CA

Security System

★ 4.4(67 reviews)

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Zions Security Alarms

El Cajon, CA

Security System

★ 4.9(56 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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Allied Security Alarms

South San Francisco, CA

Security System

★ 3.7(3 reviews)

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HM Security - ADT Authorized Dealer

Downey, CA

Security System

★ 5.0(832 reviews)

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Cyber Shield Security

Los Angeles, CA

Security System

★ 4.8(24 reviews)

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Security Cameras Installation Los Angeles

Gardena, CA

Security System

★ 3.9(7 reviews)

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DVRS, Inc.

Los Angeles, CA

Security System

★ 5.0(96 reviews)

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Golden Gate Burglar Alarm Co.

Pacifica, CA

Security System

★ 4.9(27 reviews)

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Safe and Sound Security

San Francisco, CA

Security System

★ 4.9(34 reviews)

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West Coast Security, Inc.

San Carlos, CA

Security System

★ 5.0(6 reviews)

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VP Security Guards

San Francisco, CA

Security System

★ 5.0(33 reviews)

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iTZ Networks

San Francisco, CA

Security System

★ 4.8(42 reviews)

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McMillan Security Systems, Inc.

San Francisco, CA

Security System

★ 3.5(2 reviews)

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Monarch

San Francisco, CA

Security System

★ 2.3(3 reviews)

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AX9 Security | San Francisco

San Francisco, CA

Security System

★ 4.9(13 reviews)

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Smart Shield Systems Commercial & Residential Security

San Diego, CA

Security System

★ 4.9(106 reviews)

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Knight Security

Escondido, CA

Security System

★ 3.6(13 reviews)

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Safe and Sound Security

San Diego, CA

Security System

★ 4.8(12 reviews)

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ADT Security Services

San Diego, CA

Security System

★ 3.2(76 reviews)

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Safe and Sound Security

San Jose, CA

Security System

★ 4.8(35 reviews)

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Creative Security Company

San Jose, CA

Security System

★ 4.1(50 reviews)

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California Security Cameras

San Jose, CA

Security System

★ 4.4(7 reviews)

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The Alarm Company

Campbell, CA

Security System

★ 5.0(12 reviews)

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OnView Integrated Solutions

San Jose, CA

Security System

★ 3.6(29 reviews)

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Sonitrol of Silicon Valley

San Jose, CA

Security System

★ 4.7(15 reviews)

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Pacific Surveillance

San Jose, CA

Security System

★ 5.0(6 reviews)

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CODE 4 PRIVATE SECURITY - BEST SECURITY GUARDS - SAN JOSE

San Jose, CA

Security System

★ 5.0(23 reviews)

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Security 101 - San Jose

Santa Clara, CA

Security System

★ 5.0(23 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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CSI Security

Los Angeles, CA

Security System

★ 4.9(98 reviews)

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Progressive Technology Security Systems, Inc.

Escondido, CA

Security System

★ 5.0(7 reviews)

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VP Security Guards

Los Angeles, CA

Security System

★ 5.0(102 reviews)

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ACS Security

Los Angeles, CA

Security System

★ 4.4(358 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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Zions Security Alarms

Santa Monica, CA

Security System

★ 4.8(60 reviews)

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Rigility Surveillance Solutions SF

San Francisco, CA

Security System

★ 5.0(9 reviews)

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United Security Services - Security Guard Services in San Diego

San Diego, CA

Security System

★ 4.7(6 reviews)

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Escobar's Security Plus

San Jose, CA

Security System

★ 3.7(3 reviews)

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Secure Zone

Los Angeles, CA

Security System

★ 5.0(17 reviews)

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Optimum Surveillance

Los Angeles, CA

Security System

★ 5.0(69 reviews)

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ProTech Security Systems

San Diego, CA

Security System

★ 4.6(18 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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