Computer & Network Security companies in United States

9,295 Computer & Network Security companies in United States — with websites, cities, size and what they do. Free to browse, filter and export; no subscription.

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1. Fortinet Sunnyvale · United States · 10K–50K employees
   Fortinet is a global leader in cybersecurity solutions, providing a broad range of products and services designed to protect networks, data, and applications from cyber threats.…
2. Sourcefire, Part Of Cisco Columbia · United States · 50K–100K employees
   Sourcefire, now a part of Cisco, is a leading provider of cybersecurity solutions, specializing in advanced threat protection and network security. Founded in 2001, the company…
3. Lancope - Now A Part Of Cisco Alpharetta · United States · 50K–100K employees
   Lancope, now integrated into Cisco, was a leading provider of network visibility and security solutions. The company specialized in advanced threat detection and response…
4. Palo Alto Networks Unit 42 Santa Clara · United States · 10K–50K employees
   Palo Alto Networks Unit 42 is a cybersecurity consulting team that provides incident response, threat intelligence, and security assessments to organizations worldwide. As part…
5. Hp Company Palo Alto · United States · 10K–50K employees
   HP Company is a leading provider of computer and network security solutions, specializing in innovative technologies that protect organizations from cyber threats. With a focus…
6. Zachsam Houston · United States · 5K–10K employees
   Zachsam is a leading provider of computer and network security solutions, specializing in safeguarding digital assets and ensuring the integrity of information systems. The…
7. Crowdstrike Sunnyvale · United States · 5K–10K employees
   CrowdStrike is a global cybersecurity technology company that provides endpoint security, threat intelligence, and cyberattack response services. Founded in 2011, the company is…
8. Iaisp San Francisco · United States · 5K–10K employees
   Iaisp is a leading organization in the field of computer and network security, dedicated to providing innovative solutions and services to enhance cybersecurity for businesses…
9. Threatdown Santa Clara · United States · 1K–5K employees
   Threatdown is a cybersecurity company specializing in advanced threat detection and response solutions. The company focuses on providing innovative security services that help…
10. Kratos Secureinfo Chantilly · United States · 1K–5K employees
    Kratos SecureInfo is a leading provider of advanced cybersecurity solutions, specializing in protecting critical infrastructure and sensitive data for government and commercial…
11. Aujas Cybersecurity Cupertino · United States · 1K–5K employees
    Aujas Cybersecurity is a leading provider of cybersecurity solutions, specializing in risk management, compliance, and security services. The company focuses on helping…
12. Nsfocus Santa Clara · United States · 1K–5K employees
    Nsfocus is a leading provider of cybersecurity solutions, specializing in network security, application security, and threat intelligence. The company offers a range of products…
13. High Technology Crime Investigation Association (Htcia) Westford · United States · 1K–5K employees
    The High Technology Crime Investigation Association (HTCIA) is a professional organization dedicated to the advancement of the field of high technology crime investigation.…
14. Arizona Cyber Warfare Range Gilbert · United States · 1K–5K employees
    The Arizona Cyber Warfare Range (ACWR) is a premier training facility dedicated to enhancing cybersecurity skills and knowledge. It serves as a collaborative environment for…
15. Red Sky Draper · United States · 1K–5K employees
    Red Sky is a leading provider of computer and network security solutions, specializing in advanced threat detection and response services. The company focuses on protecting…
16. Cyberevolve San Francisco · United States · 1K–5K employees
    Cyberevolve is a leading provider of cybersecurity solutions, specializing in protecting organizations from cyber threats through innovative technology and expert services. The…
17. Digicert, Inc. Lehi · United States · 1K–5K employees
    DigiCert, Inc. is a leading provider of digital certificates and security solutions, specializing in Public Key Infrastructure (PKI) and SSL/TLS certificates. Founded in 2003…
18. Hid Global - Formally Lumidigm Albuquerque · United States · 1K–5K employees
    Hid Global, formerly known as Lumidigm, is a leading provider of secure identity solutions. The company specializes in advanced biometric authentication technologies…
19. Qualys Foster City · United States · 1K–5K employees
    Qualys, Inc. is a leading provider of cloud-based security and compliance solutions. Founded in 1999, the company offers a comprehensive suite of services designed to help…
20. Dealertrack Technologies Rts - Louisiana Metairie · United States · 1K–5K employees
    Dealertrack Technologies, a subsidiary of Cox Automotive, provides software solutions and services for the automotive retail industry. The company specializes in streamlining the…
21. At&T Cybersecurity Dallas · United States · 1K–5K employees
    AT&T Cybersecurity is a division of AT&T Inc. that focuses on providing cybersecurity solutions and services to businesses and organizations. The company offers a range of…
22. Kaspersky Total Security Sunnyvale · United States · 1K–5K employees
    Kaspersky Total Security is a comprehensive security solution developed by Kaspersky Lab, a global cybersecurity company. It provides advanced protection against a wide range of…
23. Sonicwall Milpitas · United States · 1K–5K employees
    SonicWall is a cybersecurity company that specializes in providing advanced network security solutions to businesses of all sizes. Founded in 1991, SonicWall has established…
24. Certification Station San Francisco · United States · 1K–5K employees
    Certification Station is a leading provider of cybersecurity training and certification programs. The organization specializes in offering a wide range of courses designed to…
25. North Texas Chapter Of Isaca Dallas · United States · 1K–5K employees
    The North Texas Chapter of ISACA is a professional association dedicated to the advancement of IT governance, risk management, and cybersecurity. It serves as a resource for…
26. Rocketcyber Dallas · United States · 1K–5K employees
    RocketCyber is a cybersecurity company that specializes in providing advanced threat detection and response solutions for managed service providers (MSPs) and their clients. The…
27. Sentinelone Mountain View · United States · 1K–5K employees
    SentinelOne is a cybersecurity company that specializes in endpoint protection, threat detection, and response solutions. Founded in 2013, the company leverages artificial…
28. Carbon Black Palo Alto · United States · 1K–5K employees
    Carbon Black, now part of VMware, is a leading provider of cloud-native endpoint protection solutions. The company specializes in advanced threat detection and response…
29. Hillstone Networks Santa Clara · United States · 1K–5K employees
    Hillstone Networks is a leading provider of cybersecurity solutions, specializing in network security, cloud security, and data protection. Founded in 2011, the company has…
30. Gm Sectec Plaza · United States · 1K–5K employees
    Gm Sectec is a leading provider of computer and network security solutions, specializing in advanced cybersecurity services and products. The company focuses on protecting…
31. Cybercx Us Austin · United States · 1K–5K employees
    CyberCX is a leading provider of cybersecurity services in the United States, specializing in protecting organizations from cyber threats and ensuring compliance with regulatory…
32. Cyber Eagle Project San Francisco · United States · 1K–5K employees
    Cyber Eagle Project is a cybersecurity firm specializing in advanced threat detection and response solutions. The company focuses on providing innovative security services to…
33. Ixia Security Test Solutions Austin · United States · 1K–5K employees
    Ixia Security Test Solutions, a part of Keysight Technologies, specializes in providing advanced security testing solutions for networks and applications. The company focuses on…
34. Trustwave Chicago, Illinois · United States · 1K–5K employees
    Trustwave helps businesses fight cybercrime, protect data and reduce security risk. With cloud and managed security services, integrated technologies and a team of security…
35. Imperva San Mateo · United States · 1K–5K employees
    Imperva is a cybersecurity company that specializes in protecting data and applications in the cloud and on-premises. Founded in 2002, the company offers a comprehensive suite of…
36. Arctic Wolf Eden Prairie · United States · 1K–5K employees
    Arctic Wolf is a leading cybersecurity company that provides security operations as a service. Founded in 2012, the company specializes in threat detection, response, and…
37. Watchguard Technologies Seattle · United States · 1K–5K employees
    WatchGuard Technologies is a leading provider of network security solutions, specializing in firewall, VPN, and unified threat management (UTM) services. Founded in 1996, the…
38. Mcafee San Jose · United States · 1K–5K employees
    McAfee is a global cybersecurity company that provides security solutions for consumers and businesses. Founded in 1987, McAfee has established itself as a leader in the…
39. Knowbe4 Clearwater · United States · 1K–5K employees
    KnowBe4 is a leading provider of security awareness training and simulated phishing platforms. Founded in 2010, the company focuses on helping organizations manage the ongoing…
40. Exclusive Networks Na Fremont · United States · 1K–5K employees
    Exclusive Networks Na is a leading distributor of cybersecurity solutions, specializing in providing innovative technologies and services to partners and customers in the IT…
41. Cloudflare San Francisco · United States · 1K–5K employees
    Cloudflare, Inc. is a global network services provider that offers a range of services to enhance the security, performance, and reliability of websites and applications. Founded…
42. Cert Division At The Software Engineering Institute Pittsburgh · United States · 501–1K employees
    The CERT Division at the Software Engineering Institute (SEI) is a leader in software engineering and cybersecurity research. Established in 1988, it focuses on improving the…
43. Philly It Solutions Philadelphia · United States · 501–1K employees
    Philly IT Solutions is a technology service provider based in Philadelphia, specializing in computer and network security solutions. The company offers a range of services…
44. Isscoastal Inc. Pittsburgh · United States · 501–1K employees
    Isscoastal Inc. is a leading provider of computer and network security solutions, specializing in advanced cybersecurity measures to protect businesses from digital threats. The…
45. Cyversity New York · United States · 501–1K employees
    Cyversity is a nonprofit organization dedicated to promoting diversity in the cybersecurity workforce. Founded in 2014, it aims to bridge the gap in representation within the…
46. Thales Esecurity San Jose · United States · 501–1K employees
    Thales Esecurity is a leading provider of cybersecurity solutions, specializing in data protection and encryption services. The company offers a range of products designed to…
47. Bigid New York · United States · 501–1K employees
    BigID is a data intelligence platform that helps organizations discover, manage, and protect their sensitive data. Founded in 2016, the company focuses on providing solutions for…
48. Rapid7 Boston, Massachusetts · United States · 501–1K employees
    Rapid7 transforms data into insight, empowering IT and security professionals to progress and protect their organizations. How? Our solutions are powered by advanced analytics…
49. A-Lign Tampa · United States · 501–1K employees
    A-Lign is a leading provider of cybersecurity and compliance solutions, specializing in helping organizations achieve and maintain compliance with various regulatory frameworks.…
50. Sucuri Security Menifee · United States · 501–1K employees
    Sucuri Security is a leading provider of website security solutions, specializing in protecting websites from malware, hacks, and other online threats. Founded in 2010, Sucuri…