DDoS protection providers in the United States
10 of the 19 DDoS protection providers we list are based in the United States. 6 are public, 3 are owned by another company and 1 is private. The oldest, Microsoft, was founded in 1975. By revenue from annual reports, the largest company here is Microsoft ($331.8bn in FY2026).
Companies focused on DDoS protection in the United States
2 companies| Company | Based in | Founded | Size | Ownership | Revenue |
|---|---|---|---|---|---|
 NETSCOUT NETSCOUT provides real-time network visibility, observability, cybersecurity, and DDoS protection solutions. | Westford, United States | 1984 | Public, NTCT | $859.5m (FY2026) | |
 A10 Networks A10 Networks provides secure, high-performance networking solutions for applications and AI workloads. | San Jose, United States | 2004 | Public, ATEN | $290.6m (FY2025) |
Also active in DDoS protection
8 companies| Company | Based in | Founded | Size | Ownership | Revenue |
|---|---|---|---|---|---|
 Microsoft Microsoft sells software, cloud services, hardware, and gaming products. | Redmond, United States | 1975 | 228,000 staff | Public, MSFT | $331.8bn (FY2026) |
 F5 F5 provides application delivery and security solutions for hybrid multicloud environments. | Seattle, United States | 1996 | Public, FFIV | $3.1bn (FY2025) | |
 Cloudflare Cloudflare provides a global network for security, performance, and full-stack development. | San Francisco, United States | 2009 | 2,440 staff | Public, NET | $2.2bn (FY2025) |
 Fastly Fastly provides an edge cloud platform that helps businesses deliver, secure, and deploy applications and AI workloads. | San Francisco, United States | 2011 | Public, FSLY | $624.0m (FY2025) | |
 Google World-renowned cybersecurity firm now part of Google Cloud, delivering threat intelligence-led penetration testing and red teaming informed by front-line incident response experience. | Mountain View, United States | 2004 | 500+ staff | Private | |
 Amazon Web Services Amazon Web Services is a cloud computing platform that provides a wide range of services. | Seattle, United States | 2006 | Owned by Amazon | ||
 Imperva Imperva is a cybersecurity company that provides application security and data security. | San Mateo, United States | 2002 | Owned by Thales | ||
 Sucuri Sucuri provides cloud-based website security. | Menifee, United States | 2010 | Owned by GoDaddy |
More DDoS protection providers
All 19 DDoS protection providersEvery cybersecurity company in the United States · See every category