- Allied Lock & Safe
 - San Jose - Offers commercial, residential, and auto locksmithing in Silicon Valley, as well as video surveillance, safes, and access control systems. - Homeland Security Research
- San Jose - Providing the counter-terrorism industry with market information, analysis, and forecasts. Products include a newsletter, market reports, and consultation services.
- Identix
- Los Gatos - Developer of live-scan fingerprint and biometric facial identification systems.
- Landmark Protection
- San Jose - Provides security officers and lobby receptionists for corporate clients throughout Silicon Valley and Northern California.
- Modern Lock And Key
- San Jose
- Recognition Systems
- Campbell - Manufacturer of biometric hand geometry handreaders for access control.
- RFI
- San Jose - Offers installation and maintenance of security, communication, and fire alarm systems.
- Security Code 3
- San Jose - Providing commercial and residential security services. Security Code 3 offers uniformed officers, stationary and mobile patrol, investigations, threat assessments, and more.
- Sequor
- Santa Clara - Designs, sells, leases, installs, and services commercial CCTV systems designed for security and retail loss prevention applications.
- Silicon Valley Security & Patrol
- San Jose - Provides uniformed and undercover security officers, standing guards, and vehicle patrols to the San Francisco Bay Area and Northern California.
- Sonitrol - Pacific West Security
- Santa Clara - Full service security needs. Burglary, fire, access control, and CCTV.
- SpectraTek Corporation
- Mountain View - Manufactures micro-electronic surveillance equipment for law enforcement and government agencies.
- Sure Lock Homes
- San Jose - Installer of residential and business alarms, intercoms, built-in vacuums, home audio, hard wiring, CCTV, and phone systems.
- Uniq Vision Inc.
- San Jose - Designs and markets CCD cameras for industrial applications such as machine vision, automated inspection, night-vision, medical, and other scientific applications.
- Veridicom, Inc.
- Santa Clara - Provider of silicon-based fingerprint authentication technology.
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