Top 100 Cybersecurity Companies in the United States

Securonix is a midsize cybersecurity company. Established in 2007, the firm is headquartered in Addison, Texas and Los Angeles, California. Their team focuses on cybersecurity, BI & big data consulting & SI, and cloud consulting & SI.

Sqrrl is a cybersecurity company. Their midsize team is located in Cambridge, Massachusetts and specializes in cybersecurity. The agency was founded in 2012.

RiskIQ is a cybersecurity company based in San Francisco with a team of just over 150 employees. Established in 2009, they provide cybersecurity, business intelligence, big data consulting, and software integration services to clients in a variety of industries.

Founded in 2007, Lookout is a cybersecurity company. The firm focuses on cybersecurity and has a midsize team.

Kroll is a cybersecurity company. Established in 1972, the team provides cybersecurity and BI & big data consulting & SI. Their large firm is located in New York, New York; Reston, Virginia; Nashville, Tennessee and London, .

Founded in 1998, IOActive is a cybersecurity company. Their midsize team is headquartered in Seattle, Washington; London, United Kingdom; Madrid, Spain and , United Arab Emirates and offers cybersecurity.

Bay Dynamics is a San Francisco, California-based cybersecurity company. The midsize team focuses on cybersecurity, cloud consulting & SI, and IT strategy consulting. The agency was founded in 2001.

Cylance Inc. Is a cybersecurity company founded in 2012. They are based in Irvine, California and have a midsize team. Their services include cybersecurity and IT strategy consulting.

Headquartered in San Francisco, California, Mocana Corporation is a cybersecurity company. The midsize company was launched in 2002. Their services include cybersecurity, cloud consulting & SI, and IT strategy consulting.

Guidance Software is a software development firm that has been in operation since 1997. They are headquartered in Pasadena, Calif. and they have additional offices in Slough, U.K., Courbevoie, France, Waukesha, Wis., Rosemont, Ill., Dulles, Va., and New York. They have over 800 employees and they specialize in cybersecurity, IT strategy consulting, and IT staff augmentation. Their clients generally work in consumer services, government, or healthcare.

Good Harbor is a cybersecurity company located in Washington, District of Columbia. The small team focuses on cybersecurity and IT strategy consulting. The agency was launched in 2002.

Mandiant, a cybersecurity company, was established in 2004. The firm offers cybersecurity, IT managed services, IT strategy consulting, cloud consulting & SI, and more and has a midsize team.

Aspect Security is a midsize cybersecurity company. The Columbia, Maryland-based firm was founded in 2002. Their team focuses on cybersecurity, IT strategy consulting, application testing, and cloud consulting & SI.

Based in Carlsbad, California; Singapore, Singapore; Barcelona, Spain and Atlanta, Georgia, Proficio is a cybersecurity company. The midsize team offers cybersecurity, IT managed services, and IT strategy consulting. The agency was established in 2010.

Rapid7 is a cybersecurity company launched in 2000. Their large team is located in Boston, Massachusetts; Manhattan Beach, California; Austin, Texas and Cambridge, Massachusetts. The company offers cybersecurity, IT managed services, and IT strategy consulting.

Digital Guardian, an IT managed services company, was launched in 2003. Based in Waltham, Massachusetts; Reston, Virginia; Santa Clara, California and Lehi, Utah, their midsize team focuses on IT managed services, cybersecurity, and IT strategy consulting.

Veracode is a cybersecurity company based in Burlington, Massachusetts; London, United Kingdom and Boston, . The firm provides cybersecurity, application testing, and IT strategy consulting and has a midsize team.The firm was founded in 2006.

In San Antonio, Texas and Austin, Texas, Computer Solutions is an IT managed services and cybersecurity company. The midsize agency was founded in 1978. Their team offers IT managed services and cybersecurity.

Exceptional Software Strategies is a technology solutions government contractor. It was founded in 1996 and is headquartered in Linthicum, Md., with an additional office in Vienna, Va. Its team of 86 specializes in cybersecurity and custom software development.

iNovex Information Systems is an IT services company that was founded in 2004. It has 67 total employees in its two offices in Hanover, Md., and Broomfield, Colo. iNovex Information Systems offers custom software development and cybersecurity services to clients in the government, consumer products and services, and information technology industries. 

Headquartered in Washington, District of Columbia and Melbourne, Florida, Tsymmetry is a software development firm and cybersecurity company. The midsize company was founded in 1999. Their team provides custom software development and cybersecurity.

GoLeadingIT.com is an IT managed services company founded in 2010. Their small team is located in Woodstock, Illinois and provides IT managed services and IT strategy consulting.

Trustwave is an IT managed services and cybersecurity company established in 1995. Headquartered in Chicago, Illinois; , Brazil; London , United Kingdom and Denver, Colorado, their large team specializes in IT managed services and cybersecurity.

NetEnrich, Inc. Is a midsize IT managed services company established in 2004. Their services include IT managed services, cloud consulting & SI, and cybersecurity. The firm is headquartered in San Jose, California.

Make I.T. SOAR is a small cybersecurity company. They provide cybersecurity, IT strategy consulting, application testing, and other IT consulting and SI and were founded in 2016. The firm is headquartered in Appleton, Wisconsin.

Based in Newport Beach, California, US ProTech is a cybersecurity company. They focus on cybersecurity and IT managed services and were established in 1999.

Optiv, a cybersecurity company, was established in 2015. Their large team is based in Denver, Colorado. The firm offers cybersecurity and IT managed services.

Hesketh.com, a cybersecurity company, was founded in 1995. The firm focuses on cybersecurity and has a small team. The firm is located in Raleigh, North Carolina.

American Technology Services, Inc. Is a midsize IT managed services company headquartered in Fairfax, Virginia. Launched in 1994, the team specializes in IT managed services, cloud consulting & SI, IT strategy consulting, and web design.

New Net Technologies, a cybersecurity company, is based in Naples, Florida. They specialize in cybersecurity and were established in 2005.