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Every cybersecurity vendor and service firm on the list. Tick the filters to build a shortlist, then open a profile to see who owns the company and what it does. You can also browse by category or country, or see recent deals.
Results
See also Bug bounty platforms and companies based in the United States.
| Company | Category | Based in | Founded | Ownership |
|---|---|---|---|---|
 Bugcrowd Crowdsourced bug bounty pioneer founded in 2012 by Casey Ellis, offering managed programs and crowd-powered penetration testing from hundreds of thousands of ethical hackers. | Bug bounty and crowdsourced testing | San Francisco, United States | 2012 | Private |
 Cantina Cantina provides an agentic security platform that uses autonomous AI agents to detect, respond to, and fix security issues. | AI and LLM security | Miami, United States | Private | |
 HackerOne World's largest ethical hacker platform with over one million researchers, offering bug bounties and structured penetration testing to the US DoD and Fortune 500. | Bug bounty and crowdsourced testing | San Francisco, United States | 2012 | Private |
 ProjectDiscovery ProjectDiscovery builds open-source security tools and infrastructure for mapping, probing, crawling, and detecting vulnerabilities. | Vulnerability management | San Francisco, United States | 2020 | Private |
 Synack FedRAMP-authorized crowdsourced penetration testing platform combining the vetted SRT researcher community with AI-powered Hydra technology for continuous security testing. | Penetration testing | Redwood City, United States | 2013 | Part of NetSPI |