Who is the biggest cybersecurity company?

Who is the biggest cybersecurity company in the world by revenue and market value as of 2024-2025 is Palo Alto Networks, which is generally considered the largest pure-play cybersecurity company with revenue over $8 billion per year and market cap over $100 billion. Other contenders for biggest include Fortinet with revenue $5.5B, CrowdStrike with $3B and very high growth in endpoint security, and Check Point with $2.5B. If you include large tech companies that have large cybersecurity divisions, Microsoft is actually the biggest cybersecurity provider with over $20 billion in security revenue from Microsoft Defender, Azure Security and Sentinel, making it larger than any pure-play. Cisco is also huge with $4B+ security revenue from firewalls and network security. For private companies, McAfee and NortonLifeLock are large in consumer antivirus. In terms of market share for specific areas, CrowdStrike is biggest in endpoint detection, Okta is biggest in identity, and Zscaler is biggest in zero trust. In Australia, biggest cybersecurity companies include CyberCX which is Australia's largest cyber security firm with over 1,200 staff, formed by merging 12 firms, plus Tesserent, Macquarie Telecom and large consulting firms like Deloitte, EY and PwC that have large cyber practices. Globally, Palo Alto Networks is typically ranked number one for overall enterprise cybersecurity platform with most comprehensive portfolio from firewall to cloud to SOC.