The cybersecurity industry in the US focuses on protecting sensitive data and networks from digital threats. It includes a wide range of firms—from established entities to innovative startups—offering services such as threat detection, compliance consulting, and risk management. As cyber threats become increasingly sophisticated, these companies continue to evolve, leveraging advanced technologies like artificial intelligence and cloud solutions. Future prospects look promising as more organizations recognize the value of investing in cybersecurity, making proactive measures essential for safeguarding critical assets.

This list highlights 21 cybersecurity companies based in the United States. Spanning various sizes—from small firms to larger organizations—these companies have been founded from 1995 onwards and exhibit specializations that address specific industry needs. With headquarters located across states like Virginia, California, and Colorado, they deliver an assortment of innovative services including managed detection and response, incident handling, and security assessments.

Continue reading to learn about the top cybersecurity companies in the US.

Top 21 Cybersecurity Companies Companies in the US

1. Mandiant Security Validation

• Website: fireeye.com
• Ownership type: Private Equity
• Headquarters: Mclean, Virginia, United States (USA)
• Latest funding: $1.2B, June 2021
• Founded year: 2014
• Headcount: 51-200
• LinkedIn: secvalidation

Mandiant Security Validation, a subsidiary of FireEye, is a cybersecurity firm based in McLean, Virginia. Founded in 2014, the company has carved out a niche in providing comprehensive security solutions that include threat intelligence, incident response, and managed defense services. Mandiant's clientele primarily consists of businesses in sectors such as healthcare and finance, which are particularly vulnerable to cyber threats. The firm emphasizes the importance of security validation, helping organizations assess and enhance their security posture against evolving threats. With a recent funding round of $1.2 billion in June 2021, Mandiant is well-equipped to innovate and expand its offerings in the cybersecurity space, making it a significant player in the industry.

2. Optiv

• Website: optiv.com
• Ownership type: Private Equity
• Headquarters: Denver, Colorado, United States (USA)
• Employee distribution: United States (USA) 63%, India 33%, Canada 4%
• Latest funding: Other (Debt), May 2023
• Founded year: 2015
• Headcount: 1001-5000
• LinkedIn: optiv-inc

Optiv Security, Inc., based in Denver, Colorado, is a cybersecurity consulting firm that specializes in providing a broad spectrum of information security services and solutions. Established in 2015, Optiv has grown to employ over 2,300 professionals, with a significant portion of its workforce located in the United States and India. The company serves a variety of sectors, assisting organizations in managing cyber risks, ensuring compliance with regulations, and improving their overall cybersecurity posture. Optiv's service offerings include advanced detection and response, application security, cloud security, identity modernization, and risk management, among others. They also provide managed services, such as co-managed security information and event management (SIEM) and managed detection and response (MDR). Optiv's commitment to helping clients navigate the complexities of cybersecurity is evident in their extensive partnerships with technology vendors and their focus on delivering tailored solutions that meet specific business needs.

3. Trustwave

• Website: trustwave.com
• Ownership type: Corporate
• Headquarters: Chicago, Illinois, United States (USA)
• Employee distribution: United States (USA) 36%, Poland 17%, Australia 14%, Other 34%
• Latest funding: November 2024
• Founded year: 1995
• Headcount: 501-1000
• LinkedIn: trustwave

Trustwave, founded in 1995 and headquartered in Chicago, Illinois, is a cybersecurity firm that specializes in protecting organizations from cyber threats. With a workforce of over 1,000 employees, Trustwave operates globally, providing services tailored to the unique needs of its clients. The company offers a range of cybersecurity solutions, including managed detection and response, incident response, penetration testing, and database security. Trustwave's SpiderLabs team, composed of ethical hackers and security researchers, plays a crucial role in threat intelligence and incident response. The firm has been recognized for its contributions to the industry, receiving accolades from various analysts and media outlets. Trustwave's commitment to helping businesses mitigate risks and secure sensitive data positions it as a significant player in the cybersecurity sector.

4. Vectra AI

• Website: vectra.ai
• Ownership type: Private Equity
• Headquarters: San Jose, California, United States (USA)
• Employee distribution: United States (USA) 50%, Ireland 18%, Germany 4%, Other 28%
• Latest funding: Series E-K, $130.0M, April 2021
• Founded year: 2011
• Headcount: 501-1000
• LinkedIn: vectra_ai

Vectra AI, founded in 2011 and headquartered in San Jose, California, specializes in cybersecurity solutions that leverage artificial intelligence to detect and respond to hybrid attacks. The company focuses on advanced threat detection, investigation, and response, catering to a wide range of industries such as banking, healthcare, and government. Vectra AI's platform integrates various security measures, including network detection and response (NDR) and identity threat detection and response (ITDR), to provide comprehensive protection against sophisticated cyber threats. With a workforce of approximately 647 employees and a recent funding round of $130 million in April 2021, Vectra AI continues to enhance its offerings and expand its global footprint, serving clients across multiple regions including the United States, Europe, and Australia.

5. Barracuda

• Website: barracuda.com
• Ownership type: Private Equity
• Headquarters: Campbell, California, United States (USA)
• Employee distribution: United States (USA) 47%, India 21%, United Kingdom (UK) 10%, Other 23%
• Latest funding: April 2022
• Founded year: 1999
• Headcount: 1001-5000
• LinkedIn: barracuda-networks

Barracuda Networks, Inc., based in Campbell, California, is a cybersecurity company founded in 1999. With a workforce of over 2,100 employees, Barracuda specializes in providing a wide array of cybersecurity solutions tailored for businesses across various sectors. Their offerings include email protection, data protection, network security, and application security, all designed to safeguard digital assets against a multitude of cyber threats. Barracuda operates primarily through a Software as a Service (SaaS) model, allowing for scalable and efficient deployment of their security solutions. The company has a significant presence in the United States, India, the United Kingdom, and other countries, reflecting its global reach. Barracuda's innovative Managed XDR service exemplifies their commitment to staying ahead of cyber threats by offering continuous monitoring and response capabilities. Their solutions are trusted by hundreds of thousands of customers worldwide, underscoring their importance in the cybersecurity industry.

6. WatchGuard Technologies

• Website: watchguard.com
• Ownership type: Private Equity
• Headquarters: Seattle, Washington, United States (USA)
• Employee distribution: United States (USA) 31%, India 24%, Spain 13%, Other 32%
• Latest funding: April 2022
• Founded year: 1996
• Headcount: 1001-5000
• LinkedIn: watchguard-technologies

WatchGuard Technologies, based in Seattle, Washington, is a cybersecurity firm that specializes in providing comprehensive network security solutions. Established in 1996, the company has built a reputation for delivering a wide array of products, including firewalls, endpoint security, and managed services aimed at safeguarding organizations from cyber threats. With a workforce of approximately 1,189 employees, WatchGuard serves clients across various sectors, emphasizing the importance of robust security measures in today's digital landscape. The company has deployed nearly a million integrated threat management appliances globally, showcasing its extensive reach and operational capabilities. WatchGuard also invests in research and development, contributing to industry knowledge through its Threat Lab and regular security reports. Their focus on innovation is reflected in their offerings, which include AI-driven security solutions and a unified security platform designed to simplify security management for businesses and managed service providers.

7. Arctic Wolf

• Website: arcticwolf.com
• Ownership type: Venture Capital
• Headquarters: Eden Prairie, Minnesota, United States (USA)
• Employee distribution: United States (USA) 47%, Canada 33%, India 7%, Other 13%
• Latest funding: Convertible note, $401.0M, October 2022
• Founded year: 1984
• Headcount: 1001-5000
• LinkedIn: arctic-wolf-networks

Arctic Wolf Networks, founded in 1984 and based in Eden Prairie, Minnesota, is a cybersecurity firm that specializes in managed security services. The company provides a range of solutions designed to help organizations protect against cyber threats, including managed detection and response, incident response, and security awareness training. Their services are customized to address the unique challenges faced by various industries, ensuring effective risk management and security operations. Arctic Wolf has made significant strides in the cybersecurity sector, processing over 5 trillion security events weekly through their Security Operations Cloud. The company has also received substantial funding, with a recent investment of $401 million in October 2022, reflecting strong market confidence in their approach and technology. Their Concierge Delivery Model offers tailored security expertise, allowing clients to enhance their security posture while managing operational complexities. Arctic Wolf's commitment to continuous improvement and proactive risk mitigation positions them as a noteworthy entity in the cybersecurity landscape.

8. Comodo

• Website: comodo.com
• Ownership type: Private
• Headquarters: Clifton, New Jersey, United States (USA)
• Founded year: 1998
• Headcount: 1001-5000
• LinkedIn: comodo

Comodo, founded in 1998 and based in Clifton, New Jersey, is a cybersecurity company that specializes in providing a comprehensive suite of security solutions. The company operates under the name Xcitium and offers services that include malware protection, web application firewalls, and managed detection services. Their clientele primarily consists of businesses and organizations across various sectors, all relying on Comodo to protect their digital assets from an array of cyber threats. Comodo's offerings are structured around a subscription-based model, emphasizing cloud-native security services. The company has made significant strides in the industry, particularly with its Zero Trust architecture and advanced endpoint protection solutions. Comodo has also been recognized in various cybersecurity awards, showcasing its commitment to innovation and effectiveness in threat prevention and response.

9. Nuspire

• Website: nuspire.com
• Ownership type: Private Equity
• Headquarters: Commerce Charter Township, Michigan, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: November 2016
• Founded year: 1999
• Headcount: 201-500
• LinkedIn: nuspire

Nuspire, founded in 1999 and based in Commerce Charter Township, Michigan, is a managed security services provider (MSSP) that specializes in cybersecurity solutions. With a workforce of around 163 employees, Nuspire has built a reputation for its client-centric approach, focusing on delivering customized security measures across various industries, including manufacturing, healthcare, and finance. Their service offerings include managed detection and response, endpoint protection, and cybersecurity consulting, which are designed to meet the unique challenges faced by their clients. Nuspire's commitment to enhancing security postures is evident in their proactive strategies and the integration of advanced technologies. They have not reported any recent funding, indicating a stable operational model since their last funding round in 2016. Nuspire's extensive experience and tailored services position them as a significant player in the cybersecurity industry.

10. TechGuard Security

• Website: techguard.com
• Ownership type: Private
• Headquarters: O'Fallon, Illinois, United States (USA)
• Employee distribution: United States (USA) 86%, Australia 8%, India 3%, Other 3%
• Founded year: 2000
• Headcount: 51-200
• LinkedIn: techguard-security

TechGuard Security, based in O'Fallon, Illinois, is a cybersecurity firm established in 2000. The company specializes in providing a wide array of cybersecurity solutions, including risk management, compliance consulting, and security awareness training. With a workforce of approximately 93 employees, TechGuard serves a variety of clients, including government agencies and businesses, focusing on the protection of critical infrastructure and sensitive data from cyber threats. The firm is known for its DEFEND360™ service, which combines proactive threat prevention with comprehensive defense strategies. TechGuard has also made significant contributions to the industry through its innovative research and development efforts, holding over fifty patents related to cybersecurity technologies. Their commitment to training and awareness is evident in their S.H.I.E.L.D. Cybersecurity Awareness Training program, which aims to empower employees to recognize and respond to cyber risks. TechGuard's mission is to align people, processes, and technology with best practices in cybersecurity and compliance, ensuring tailored solutions for their clients.

11. Fortified Health Security

• Website: fortifiedhealthsecurity.com
• Ownership type: Private Equity
• Headquarters: Brentwood, Tennessee, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: December 2022
• Founded year: 2009
• Headcount: 51-200
• LinkedIn: fortified-health-security

Fortified Health Security, founded in 2009 and based in Brentwood, Tennessee, is a cybersecurity firm dedicated to the healthcare industry. With a workforce of approximately 129 employees, the company specializes in providing tailored cybersecurity services that address the specific needs of healthcare organizations. Their offerings include Virtual Chief Information Security Officer (vCISO) services, Incident Response, Security Risk Assessments, and advanced penetration testing. Fortified Health Security partners with hospitals, health systems, and healthcare technology firms to enhance their cybersecurity posture and protect patient data. The firm emphasizes a collaborative approach, ensuring that clients receive ongoing support and expertise to navigate the complex cybersecurity landscape. Their focus on healthcare-specific challenges positions them as a critical player in safeguarding sensitive information in an industry that is increasingly targeted by cyber threats.

12. Defendify

• Website: defendify.com
• Ownership type: Venture Capital
• Headquarters: Portland, Maine, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: $3.4M, August 2022
• Founded year: 2017
• Headcount: 11-50
• LinkedIn: defendify

Defendify, based in Portland, Maine, is a cybersecurity service provider that specializes in an All-In-One Cybersecurity® platform. This platform is designed to protect organizations from a variety of cyber threats. Their offerings include managed detection and response, incident response planning, and cybersecurity training, which are essential for organizations aiming to bolster their security measures. Since its inception in 2017, Defendify has catered to multiple industries, including manufacturing, healthcare, and professional services, helping clients enhance their security posture and comply with regulatory requirements. The company has also received $3.35 million in funding as of August 2022, reflecting its growth potential and the trust investors place in its business model. Defendify's approach simplifies cybersecurity for organizations, making it more accessible and manageable.

13. CyberProof

• Website: cyberproof.com
• Ownership type: Corporate
• Headquarters: Aliso Viejo, California, United States (USA)
• Employee distribution: India 63%, Israel 14%, Spain 13%, Other 11%
• Latest funding: January 2018
• Founded year: 2017
• Headcount: 501-1000
• LinkedIn: cyberproof-inc.

CyberProof, based in Aliso Viejo, California, is a cybersecurity firm founded in 2017. The company specializes in providing a range of security services, including Managed Detection & Response, threat intelligence, and penetration testing. CyberProof serves clients across various sectors, including Automotive, Banking, Financial Services, and Healthcare, helping them bolster their defenses against evolving cyber threats. The company operates with a global workforce, with a significant presence in India, Israel, and Europe. CyberProof has positioned itself as a cloud-first security operations provider, leveraging partnerships with major technology companies like Microsoft and Google to enhance its service offerings. Their focus on AI and advanced threat detection reflects a commitment to staying ahead of the curve in the cybersecurity field.

14. All Covered

• Website: allcovered.com
• Ownership type: Corporate
• Headquarters: Ramsey, New Jersey, United States (USA)
• Employee distribution: United States (USA) 95%, India 4%, Other 2%
• Latest funding: January 2011
• Founded year: 1997
• Headcount: 1001-5000
• LinkedIn: all-covered

All Covered, founded in 1997 and based in Ramsey, New Jersey, is an IT service provider that specializes in managed IT services, cybersecurity, and cloud solutions. With a workforce of over 1,500 employees, the company caters to a variety of industries, including legal, healthcare, finance, and education. All Covered is dedicated to enhancing technology infrastructure and security for its clients, offering tailored IT solutions that address specific business needs. Their cybersecurity services include strategic defensive support, penetration testing, and comprehensive risk assessments, aimed at identifying and mitigating potential threats. The company operates with a commitment to delivering personalized support and has built a reputation for its expertise in navigating the complexities of IT and cybersecurity. As part of Konica Minolta, All Covered leverages extensive industry experience to empower businesses with effective technology solutions.

15. Cipher | A Prosegur company

• Website: cipher.com
• Ownership type: Venture Capital
• Headquarters: Miami, Florida, United States (USA)
• Employee distribution: Brazil 40%, Spain 38%, United States (USA) 11%, Other 11%
• Latest funding: January 2015
• Founded year: 2000
• Headcount: 201-500
• LinkedIn: cipher

Cipher | A Prosegur company, based in Miami, Florida, specializes in cybersecurity solutions aimed at enhancing the security posture of businesses and organizations. Founded in 2000, the company has grown to employ approximately 374 professionals, with a significant presence in Brazil, Spain, and the United States. Cipher offers a range of services, including managed security services, consulting, and their innovative xMDR platform, which leverages AI and advanced data analytics to provide comprehensive threat detection and response capabilities. The company operates six Cybersecurity Operation Centers, allowing them to deliver 24/7 monitoring and support. Cipher's approach is centered on continuous improvement, helping clients navigate the complexities of cybersecurity while ensuring compliance with industry standards. Their commitment to client success is evident in their tailored solutions that address specific security needs across various sectors.

16. Exabeam

• Website: exabeam.com
• Ownership type: Venture Capital
• Headquarters: Foster City, California, United States (USA)
• Employee distribution: United States (USA) 56%, India 18%, United Arab Emirates 6%, Other 20%
• Latest funding: $1.0M, December 2021
• Founded year: 2003
• Headcount: 501-1000
• LinkedIn: exabeam

Exabeam, founded in 2003 and based in Foster City, California, is a cybersecurity firm that specializes in threat detection, investigation, and response solutions. The company offers an AI-driven Security Operations Platform designed to help organizations across various industries, including financial services and healthcare, enhance their security operations. Exabeam's platform integrates advanced analytics and automation to streamline security workflows, making it easier for organizations to manage and respond to threats. With a workforce of approximately 943 employees, Exabeam has established a significant presence in the cybersecurity sector. The company has also received funding, with its last reported amount being $1 million in December 2021, indicating ongoing investor interest in its innovative solutions. Exabeam's commitment to improving security operations is further evidenced by its recognition in the 2024 Gartner Magic Quadrant for SIEM, highlighting its competitive position in the market.

17. Coalition, Inc.

• Website: coalitioninc.com
• Ownership type: Venture Capital
• Headquarters: San Francisco, California, United States (USA)
• Employee distribution: United States (USA) 79%, Canada 9%, United Kingdom (UK) 5%, Other 7%
• Latest funding: $30.0M, March 2025
• Founded year: 2017
• Headcount: 501-1000
• LinkedIn: coalitioninc

Coalition, Inc., founded in 2017 and based in San Francisco, California, operates at the intersection of insurance and cybersecurity. The company specializes in providing Active Insurance, a novel approach designed to protect organizations from cyber threats. Their offerings include comprehensive cyber insurance tailored for various digital risks, such as ransomware and email compromise. Coalition also provides advanced cybersecurity tools, including Coalition Control™, a risk management platform, and Managed Detection & Response services, which help businesses identify and respond to threats in real-time. With a workforce of approximately 744 employees and a significant presence in the U.S., Canada, and the U.K., Coalition is positioned as a proactive partner for organizations looking to navigate the complexities of digital security. The company has recently secured $30 million in funding, reflecting investor confidence in its innovative model and growth potential.

18. RiskIQ

• Website: riskiq.com
• Ownership type: Corporate
• Headquarters: San Francisco, California, United States (USA)
• Employee distribution: United States (USA) 62%, Spain 19%, Argentina 9%, Other 9%
• Latest funding: $500.0M, July 2021
• Founded year: 2009
• Headcount: 201-500
• LinkedIn: riskiq_2

RiskIQ, founded in 2009 and based in San Francisco, California, is a cybersecurity firm that specializes in digital threat management. The company provides solutions that help organizations identify and mitigate risks associated with their online assets, including websites, mobile applications, and social media accounts. RiskIQ's technology enables businesses to monitor their digital footprint, detect vulnerabilities, and respond to threats effectively. With a workforce of approximately 201-500 employees, RiskIQ has established itself as a significant player in the cybersecurity space. The company has received substantial funding, with a notable investment of $500 million in July 2021, which underscores its growth trajectory and the confidence investors have in its offerings.

19. Proofpoint

• Website: proofpoint.com
• Ownership type: Private Equity
• Headquarters: Sunnyvale, California, United States (USA)
• Employee distribution: United States (USA) 55%, United Kingdom (UK) 14%, Canada 6%, Other 25%
• Latest funding: $12.3B, April 2021
• Founded year: 2002
• Headcount: 1001-5000
• LinkedIn: proofpoint

Proofpoint, Inc., founded in 2002 and headquartered in Sunnyvale, California, is a cybersecurity firm that specializes in safeguarding organizations against advanced threats. The company offers a comprehensive suite of software solutions, including email security, data loss prevention, and compliance services, primarily targeting businesses across various sectors. Proofpoint operates on a Software as a Service (SaaS) model, allowing for scalable and adaptive security measures. With a workforce of nearly 5,000 employees, Proofpoint has built a robust customer base, protecting over 6,000 organizations, including more than half of the Fortune 100. The company is recognized for its innovative approach, leveraging AI and behavioral insights to enhance threat detection and mitigate risks associated with human error. In 2021, Proofpoint was acquired by Thoma Bravo in a deal valued at $12.3 billion, marking a significant milestone in its growth trajectory. This acquisition reflects the company's strong market position and ongoing relevance in the cybersecurity industry.

20. OpenDNS

• Website: umbrella.cisco.com
• Ownership type: Private
• Headquarters: San Francisco, California, United States (USA)
• Founded year: 2006
• Headcount: 501-1000
• LinkedIn: opendns

OpenDNS, now branded as Cisco Umbrella, was founded in 2006 and is headquartered in San Francisco, California. The company specializes in cloud-delivered security solutions designed to protect organizations from a wide array of cyber threats. Their offerings include DNS-layer security, secure web gateways, and cloud access security, which are crucial for safeguarding sensitive data and ensuring safe internet access. OpenDNS serves various sectors, including government, healthcare, and education, showcasing its capability to address the unique security needs of different industries. The company operates on a subscription model, allowing clients to scale their security solutions according to their requirements. With a workforce of around 208 employees, OpenDNS continues to innovate and adapt to the evolving cybersecurity landscape, making it a relevant entity in the field.

21. Adlumin

• Website: adlumin.com
• Ownership type: Corporate
• Headquarters: Washington, D.C., District Of Columbia, United States (USA)
• Employee distribution: United States (USA) 86%, Philippines 12%, Australia 3%
• Latest funding: $100.0M, November 2024
• Founded year: 2016
• Headcount: 51-200
• LinkedIn: adlumin-inc.

Adlumin is a cybersecurity firm based in Washington, D.C., founded in 2016. The company specializes in providing a Security Operations Platform that integrates various security services, including Extended Detection and Response (XDR) and Managed Detection and Response (MDR). Adlumin's platform is designed to enhance the security posture of organizations by offering real-time monitoring, threat detection, and incident response capabilities. Their clientele includes a range of sectors such as finance, healthcare, and government, reflecting their ability to meet the security demands of different industries. Adlumin operates on a Software as a Service (SaaS) model, allowing for seamless integration with existing technology infrastructures. The company has recently secured $100 million in funding, which underscores its growth trajectory and commitment to advancing cybersecurity solutions.

Cybersecurity Companies Insights: Key Companies in the US

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