Top Cybersecurity Companies in San Francisco, CA
We ranked 3 cybersecurity companies in and around San Francisco, CA on client reviews, how many are verified, service focus and profile completeness. Includes companies in nearby San Mateo and Walnut Creek. Updated October 2026. How rankings work
Firms that assess, harden and monitor systems, and help companies meet security and compliance requirements.
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Offensive security firm headquartered in Tempe, Arizona, providing penetration testing, red teaming and continuous security testing for enterprises.
No reviews yet
San Francisco, CA
- Cybersecurity
IT support and compliance consultancy serving Alaska, the San Francisco Bay Area, and Washington.
No reviews yet
Walnut Creek, CA
- Managed IT Services
- Cybersecurity
Test automation, modular QA engineering and game or connected-product testing.
No reviews yet
San Mateo, CA
- Software Testing & QA
- Cybersecurity
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