> Enrich.chat gives AI agents verified work emails and mobiles. To use it from an agent, read https://enrich.chat/agents.md . This is the Markdown version of https://enrich.chat/companies-in/san-francisco-ca/computer-and-network-security/ # Cybersecurity Companies in San Francisco, CA The bigger cybersecurity companies headquartered in San Francisco, CA, with what they do, their sizes and how to reach their people. By Enrich.chat Editorial. Updated October 22, 2026. **Short answer:** Among the cybersecurity companies counted in San Francisco, CA, the biggest by headcount range include Hexnode, Armis and Sysdig. They are mostly very small: 67% have 50 or fewer employees. ## Which cybersecurity companies are in San Francisco? Among the companies whose public profile lists Computer and Network Security as their industry and San Francisco, CA as their headquarters, the biggest by headcount range include Hexnode, Armis, Sysdig, Abnormal Security and Nozomi Networks. Names link to a company profile where we have one. | Company | Employees | | --- | --- | | Hexnode | 501 to 1,000 | | Armis | 501 to 1,000 | | Sysdig | 501 to 1,000 | | Abnormal Security | 501 to 1,000 | | Nozomi Networks | 201 to 500 | | Vehere | 201 to 500 | | Picus Security | 201 to 500 | | Skybox Security | 201 to 500 | | Cobalt | 201 to 500 | | Horizon3.Ai | 201 to 500 | | Sift | 201 to 500 | | Upwind Security | 201 to 500 | | Corelight | 201 to 500 | | Traceable By Harness | 201 to 500 | | Authy | 201 to 500 | | Oneclick Solutions Group | 201 to 500 | | Wallarm Api Security Leader | 51 to 200 | | Panther | 51 to 200 | | Quantstamp | 51 to 200 | | Workstreet | 51 to 200 | | Viso Trust | 51 to 200 | | Riot | 51 to 200 | | Material Security | 51 to 200 | | [CrowdStrike](https://enrich.chat/company/crowdstrike/) | 51 to 200 | | Cloudflare Area 1 Security | 51 to 200 | The table shows the 25 biggest by headcount range, with ties broken by audience size. The charts and percentages below cover every company counted for this page, not just these 25, and companies with fewer than 11 employees are not counted. Headquarters is the location on each company's public profile. ## What do cybersecurity companies in San Francisco do? Computer and Network Security is a broad label. The most common NAICS codes among them are 541511 (27%), 561621 (23%) and 513210 (14%). **Figure: What cybersecurity companies in San Francisco do.** Bars for the share of counted cybersecurity companies with each code: 541511 27%, 561621 23%, 513210 14%, 541512 14%, 561612 9%, 334610 5%, 517111 5%. *Share of counted cybersecurity companies in San Francisco by their NAICS code.* [NAICS 541511](https://enrich.chat/naics/541511/)[NAICS 561621](https://enrich.chat/naics/561621/)[NAICS 513210](https://enrich.chat/naics/513210/)[NAICS 541512](https://enrich.chat/naics/541512/)[NAICS 561612](https://enrich.chat/naics/561612/)[NAICS 334610](https://enrich.chat/naics/334610/) ## How big are they? 67% of the cybersecurity companies counted in San Francisco have 50 or fewer employees, and the middle one is in the 11 to 50 range. Companies with fewer than 11 employees are not counted. **Figure: Size of cybersecurity companies in San Francisco.** Seven columns for the share of counted cybersecurity companies in San Francisco in each employee range: 11 to 50 67%, 51 to 200 18%, 201 to 500 11%, 501 to 1,000 4%, 1,001 to 5,000 0%, 5,001 to 10,000 0%, 10,001+ 0%. *Share of counted cybersecurity companies in San Francisco in each employee range.* ## How old are they? Most were founded in the 2010s (60%), then the 2020s (29%). **Figure: When cybersecurity companies in San Francisco were founded.** Eight columns for the share of counted cybersecurity companies in San Francisco founded in each era: Before 1960 0%, 1960s 0%, 1970s 0%, 1980s 1%, 1990s 2%, 2000s 8%, 2010s 60%, 2020s 29%. *Share of counted cybersecurity companies in San Francisco by the era they were founded in, for the ones that list a founding year.* ## How cybersecurity companies compare - 89% were founded in 2010 or later, against 54% across other cities on this site. ## How do you reach the people at cybersecurity companies in San Francisco? The people to talk to are usually security, engineering and revenue leaders. Build the list in three prompts to your AI agent. ### 1. Count them (free) Counting who matches never uses credits. ```text Use www.enrich.chat to count the cybersecurity companies in San Francisco, CA ``` ### 2. Find the people (5 credits per person) Name the roles you sell to. Each person returned is 5 credits, and name, title and company are included. ```text Use www.enrich.chat to find the security, engineering and revenue leaders at cybersecurity companies in San Francisco, CA, with their titles ``` ### 3. Get their work emails (10 credits each) An email is 10 credits only when one is found. Every email comes with a status: verified, catch-all or unknown. ```text Use www.enrich.chat to find the work emails for these people and tell me which ones are verified ``` ## More to explore Other industries in San Francisco: [Software Companies](https://enrich.chat/companies-in/san-francisco-ca/software-development/)[Technology and Internet Companies](https://enrich.chat/companies-in/san-francisco-ca/technology-information-and-internet/)[IT Services Companies](https://enrich.chat/companies-in/san-francisco-ca/it-services-and-it-consulting/)[Financial Services Companies](https://enrich.chat/companies-in/san-francisco-ca/financial-services/)[Advertising Agencies](https://enrich.chat/companies-in/san-francisco-ca/advertising-services/)[Real Estate Companies](https://enrich.chat/companies-in/san-francisco-ca/real-estate/)[Construction Companies](https://enrich.chat/companies-in/san-francisco-ca/construction/)[Hospitals and Health Care Organizations](https://enrich.chat/companies-in/san-francisco-ca/hospitals-and-health-care/)[Consulting Firms](https://enrich.chat/companies-in/san-francisco-ca/business-consulting-and-services/)[Nonprofit Organizations](https://enrich.chat/companies-in/san-francisco-ca/non-profit-organizations/)[Venture Capital and Private Equity Firms](https://enrich.chat/companies-in/san-francisco-ca/venture-capital-and-private-equity-principals/)[Design Firms](https://enrich.chat/companies-in/san-francisco-ca/design-services/)[Architecture Firms](https://enrich.chat/companies-in/san-francisco-ca/architecture-and-planning/)[Staffing and Recruiting Firms](https://enrich.chat/companies-in/san-francisco-ca/staffing-and-recruiting/)[Law Firms](https://enrich.chat/companies-in/san-francisco-ca/law-practice/)[Biotechnology Companies](https://enrich.chat/companies-in/san-francisco-ca/biotechnology-research/)[Colleges and Universities](https://enrich.chat/companies-in/san-francisco-ca/higher-education/)[Education Organizations](https://enrich.chat/companies-in/san-francisco-ca/education-administration-programs/)[Legal Services Firms](https://enrich.chat/companies-in/san-francisco-ca/legal-services/)[All of San Francisco](https://enrich.chat/companies-in/san-francisco-ca/) Cybersecurity Companies in other cities: [San Jose, CA](https://enrich.chat/companies-in/san-jose-ca/computer-and-network-security/) ## Frequently asked questions ### Which are the biggest cybersecurity companies in San Francisco? Among those counted, they include Hexnode, Armis, Sysdig, Abnormal Security and Nozomi Networks, ranked by headcount range. ### How big are cybersecurity companies in San Francisco? 67% of those counted have 50 or fewer employees, and the middle one is in the 11 to 50 range. Companies with fewer than 11 employees are not counted. ### Which companies count as computer and network security? Companies whose public profile lists Computer and Network Security as their industry and whose headquarters are in San Francisco, CA. ## Try this prompt Find the people at cybersecurity companies in San Francisco ```text Use www.enrich.chat to find the security, engineering and revenue leaders at cybersecurity companies in San Francisco, CA, with titles and verified work emails ``` ## Related - [Companies using a technology](https://enrich.chat/companies-using/) - [Software Companies in San Francisco](https://enrich.chat/companies-in/san-francisco-ca/software-development/) - [Technology and Internet Companies in San Francisco](https://enrich.chat/companies-in/san-francisco-ca/technology-information-and-internet/) - [IT Services Companies in San Francisco](https://enrich.chat/companies-in/san-francisco-ca/it-services-and-it-consulting/) - [Financial Services Companies in San Francisco](https://enrich.chat/companies-in/san-francisco-ca/financial-services/) - [Cybersecurity Companies in San Jose](https://enrich.chat/companies-in/san-jose-ca/computer-and-network-security/) - [Tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/)