The network security industry in California plays a vital role in protecting organizations from escalating cyber threats. Companies in this sphere provide various solutions that encompass firewalls, data protection services, and threat detection systems. With the increasing reliance on digital infrastructure and remote work, the focus on robust security measures is more pressing than ever. California’s fertile ground for innovation promotes advancements in AI-driven security technologies, reflecting the sector's trend towards automation and real-time threat intelligence. Not only does this industry attract significant investments, but it is also pivotal in maintaining trust in digital transactions and communications.

This listing features a mix of 20 notable network security companies based in California, ranging from established firms to newer enterprises. With sizes varying from small teams to thousands of employees, these companies were founded between 1987 and 2017. They specialize in various areas, including cloud security, IoT protection, and threat intelligence. Pacific hubs like San Francisco and Sunnyvale host many key players, highlighting the state's influence and expertise in the cybersecurity sector. Their innovative solutions are essential in a world where cybersecurity challenges are constantly evolving.

Continue reading to discover the top network security companies in California.

Top 20 Network Security Companies in California

1. SonicWall

• Website: sonicwall.com
• Ownership type: Corporate
• Headquarters: Milpitas, California, United States (USA)
• Employee distribution: India 40%, United States (USA) 30%, China 7%, Other 22%
• Latest funding: June 2016
• Founded year: 1991
• Headcount: 1001-5000
• LinkedIn: sonicwall

SonicWall, headquartered in Milpitas, California, is a cybersecurity firm that has been operational since 1991. The company offers a comprehensive suite of products aimed at enhancing network security for businesses and organizations. Their offerings include advanced firewalls, secure VPN solutions, and cloud security services, all designed to protect against a variety of cyber threats. SonicWall serves a wide range of clients, focusing on those who need to comply with stringent industry regulations. The company has a significant global presence, with a workforce distributed across several countries, including India, the United States, and China. SonicWall has not reported any recent funding, indicating a stable operational model that relies on its established market position and customer base.

2. 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 firm that specializes in protecting businesses from a variety of cyber threats. Established in 1999, Barracuda has developed a robust portfolio of solutions that includes email protection, data protection, network security, and application security. The company operates primarily through a Software-as-a-Service (SaaS) model, allowing clients to implement security measures without the need for extensive hardware installations. Barracuda's products are designed to safeguard digital assets, ensuring compliance and minimizing the risk of data breaches. With a workforce of over 2,100 employees, the company has a global reach, serving clients in various industries, including healthcare, finance, and education. Their proactive approach to cybersecurity, including offerings like Managed XDR, positions them as a relevant player in the ongoing battle against cyber threats.

3. Blue Coat Systems acquired by Symantec

• Website: bluecoat.com
• Ownership type: Corporate
• Headquarters: Sunnyvale, California, United States (USA)
• Employee distribution: United States (USA) 64%, India 12%, Malaysia 10%, Other 14%
• Latest funding: $4.7B, June 2016
• Founded year: 1996
• Headcount: 1001-5000
• LinkedIn: blue-coat-systems

Blue Coat Systems, acquired by Symantec and now part of Broadcom, is a cybersecurity and network management firm based in Sunnyvale, California. Founded in 1996, the company has built a reputation for offering a range of products and services that include web gateway appliances and security threat scanning. Blue Coat Systems primarily serves large enterprises and internet service providers, helping them secure their networks and manage internet traffic effectively. The company has been involved in various aspects of network security, focusing on protecting organizations from evolving cyber threats. Their solutions are designed to enhance security protocols and ensure safe internet usage, making them a notable player in the cybersecurity industry.

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, Inc., founded in 2011 and based in San Jose, California, is a cybersecurity firm that specializes in AI-driven solutions for hybrid attack detection, investigation, and response. The company serves a variety of sectors, including banking, healthcare, and government, providing advanced security measures to combat sophisticated cyber threats. Vectra AI's platform integrates extended detection and response (XDR) capabilities, allowing organizations to detect, prioritize, investigate, and respond to security incidents effectively. With a workforce of approximately 647 employees and a global presence, Vectra AI has established itself as a significant player in the cybersecurity industry. The company has received substantial funding, with its last round totaling $130 million in April 2021, which underscores its potential for growth and innovation in the cybersecurity market.

5. Netskope

• Website: netskope.com
• Ownership type: Private Equity
• Headquarters: Santa Clara, California, United States (USA)
• Employee distribution: United States (USA) 33%, India 32%, Taiwan 6%, Other 29%
• Latest funding: Convertible note, $401.0M, January 2023
• Founded year: 2012
• Headcount: 1001-5000
• LinkedIn: netskope

Netskope, founded in 2012 and based in Santa Clara, California, is a cloud security provider that focuses on secure access and data protection solutions. The company offers a range of products designed to help businesses secure their cloud environments, including Security Service Edge and Cloud Access Security Broker services. Netskope serves a wide array of industries, such as finance and healthcare, which rely on their expertise to manage security risks associated with cloud services and remote work. With a workforce of approximately 2,728 employees, the company has established a global presence, with significant operations in the United States and India. In January 2023, Netskope secured $401 million in funding, underscoring its growth potential and commitment to innovation. Their recognition as a leader in the 2024 Gartner Magic Quadrant for Single-Vendor Secure Access Service Edge further solidifies their position in the market, showcasing their ability to meet the evolving needs of organizations in a cloud-driven world.

6. 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 operating under the Cisco Umbrella brand, is a cybersecurity firm based in San Francisco, California. Founded in 2006, the company has carved out a niche in providing cloud-delivered security solutions aimed at protecting organizations from cyber threats. Their services include DNS-layer security, secure web gateways, and cloud access security, catering to a wide array of sectors such as government, healthcare, and education. OpenDNS operates on a subscription model, allowing organizations to scale their security measures according to their needs. The company is recognized for its innovative approach to cybersecurity, leveraging threat intelligence from Cisco Talos to enhance its offerings. With a focus on simplifying security for users, OpenDNS has become a trusted partner for many organizations looking to secure their networks and data.

7. Zingbox Inc. (A Palo Alto Networks Company)

• Website: zingbox.com
• Ownership type: Corporate
• Headquarters: Mountain View, California, United States (USA)
• Latest funding: $75.0M, September 2019
• Founded year: 2014
• Headcount: 11-50
• LinkedIn: zingbox-inc.

Zingbox Inc., a subsidiary of Palo Alto Networks, was founded in 2014 and is based in Mountain View, California. The company specializes in cybersecurity solutions, particularly for Internet of Things (IoT) devices. Zingbox's technology focuses on applying Zero Trust security principles to IoT environments, ensuring that every connected device is continuously monitored and assessed for risks. This approach helps organizations manage the security of their networks more effectively, especially as the number of connected devices continues to rise. Zingbox has received significant funding, amounting to $75 million as of September 2019, which underscores investor confidence in its mission to enhance IoT security. The company’s solutions are designed to provide visibility and control over IoT devices, addressing vulnerabilities that traditional security measures may overlook.

8. Versa Networks

• Website: versa-networks.com
• Ownership type: Venture Capital
• Headquarters: Santa Clara, California, United States (USA)
• Employee distribution: India 57%, United States (USA) 33%, Canada 2%, Other 8%
• Latest funding: Other (Debt), October 2022
• Founded year: 2012
• Headcount: 501-1000
• LinkedIn: versa-networks

Versa Networks, founded in 2012 and based in Santa Clara, California, is a technology company that specializes in secure networking and cybersecurity solutions. The firm offers a range of products, including Secure Access Service Edge (SASE) and Software-Defined Wide Area Networking (SD-WAN), aimed at helping businesses secure their digital infrastructure and enhance connectivity. With a workforce of approximately 793 employees, the company has established a significant presence in the industry, serving clients across various sectors such as finance, healthcare, and technology. Versa Networks has been recognized for its innovative approach, particularly in integrating security features into its networking solutions. Their commitment to addressing the evolving challenges of network security is evident in their product offerings, which include advanced security measures like Zero Trust Network Access (ZTNA) and Next Generation Firewalls (NGFW).

9. McAfee

• Website: mcafee.com
• Ownership type: Private Equity
• Headquarters: San Jose, California, United States (USA)
• Employee distribution: India 50%, United States (USA) 23%, Canada 7%, Other 20%
• Latest funding: March 2022
• Founded year: 1987
• Headcount: 1001-5000
• LinkedIn: mcafee

McAfee Corp. is a computer security software company headquartered in San Jose, California. Founded in 1987, McAfee has built a reputation for providing comprehensive security solutions aimed at protecting individuals and families from various cyber threats. Their product lineup includes antivirus software, identity protection services, and privacy tools, catering primarily to consumers. McAfee operates on a subscription model, ensuring that users receive continuous updates and support to safeguard their personal information and devices. The company employs a significant workforce, with a notable presence in India and the United States, reflecting its global reach. McAfee's commitment to enhancing online safety is evident through its innovative features, such as identity monitoring and advanced privacy protection, which are designed to address the growing concerns of digital security.

10. Dataway

• Website: dataway.com
• Ownership type: Private
• Headquarters: San Francisco, California, United States (USA)
• Employee distribution: Ireland 66%, China 17%, Venezuela 17%
• Founded year: 1993
• Headcount: 11-50
• LinkedIn: dataway

Dataway, founded in 1993 and based in San Francisco, California, is a cybersecurity firm that specializes in enterprise and cloud-based network security. With a dedicated team of around 40 employees, Dataway has carved out a niche in providing managed and professional services tailored to the unique needs of organizations, particularly in high-risk sectors such as healthcare and finance. Their offerings include security monitoring, compliance strategy, data protection, and incident response planning. Dataway prides itself on its ability to adapt to the ever-changing cybersecurity landscape, ensuring that their clients are not only protected but also compliant with relevant regulations. The company has built a reputation for its strategic approach, focusing on long-term partnerships with clients and delivering ongoing support. Their expertise extends to securing remote work environments and implementing robust security measures that evolve with technological advancements.

11. Nevis Networks

• Website: nevisnetworks.com
• Ownership type: Venture Capital
• Headquarters: Mountain View, California, United States (USA)
• Latest funding: January 2019
• Founded year: 2002
• Headcount: 51-200
• LinkedIn: nevis-networks

Nevis Networks, founded in 2002 and based in Mountain View, California, is a cybersecurity firm that focuses on LAN security solutions. The company offers a range of products, including the LANenforcer and LANsecure, which are designed to protect enterprise networks from unauthorized access and threats. Nevis Networks serves a variety of industries, particularly financial services and healthcare, where robust security measures are essential for compliance and data integrity. Their innovative approach includes the use of ASIC-based technology to create a Personal DMZ for each user, enhancing security at the individual level. Nevis has garnered attention in the industry for its unique solutions and has been recognized as a company to watch by publications like EE Times. With a dedicated team and a clear focus on LAN security, Nevis Networks continues to contribute to the cybersecurity landscape.

12. Demisto

• Website: demisto.com
• Ownership type: Corporate
• Headquarters: Cupertino, California, United States (USA)
• Latest funding: $560.0M, February 2019
• Founded year: 2015
• Headcount: 51-200
• LinkedIn: demisto

Demisto, founded in 2015 and based in Cupertino, California, is a cybersecurity company that specializes in security orchestration and automation. Initially an independent entity, Demisto gained recognition for its innovative platform, Cortex XSOAR, which integrates various security tools and automates incident response processes. This capability allows organizations to respond to threats more efficiently and effectively. In February 2019, Demisto secured $56 million in funding, which underscored its growth potential and market relevance. The company has since been integrated into Palo Alto Networks, further enhancing its capabilities and reach within the cybersecurity industry. Demisto's focus on AI-driven security solutions positions it well in a market that increasingly demands automation and intelligence in threat management.

13. Varutra Consulting

• Website: varutra.com
• Ownership type: Private
• Headquarters: Mission Viejo, California, United States (USA)
• Employee distribution: India 100%
• Founded year: 2012
• Headcount: 201-500
• LinkedIn: varutra-consulting

Varutra Consulting, established in 2012 and based in Mission Viejo, California, is a cybersecurity consulting firm that offers a wide range of security services. The company specializes in cloud security, mobile security, application security, and notably, network security. Varutra's approach emphasizes customized solutions and training, aiming to address the evolving challenges posed by cyber threats. With a workforce of around 124 employees, the company operates primarily out of India, with additional offices in the United States. Varutra has been recognized for its contributions to the industry, having been listed in various awards and accolades, including being named one of the Top 20 Most Promising Cyber Security Companies in 2015 and receiving the Cybersecurity Excellence Award in 2021. Their commitment to security is further underscored by their certifications, including ISO-27001 and their status as a CERT-In empaneled organization. Varutra's focus on providing security assessments and training programs positions them as a relevant player in the cybersecurity consulting market.

14. 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, founded in 2017 and based in Aliso Viejo, California, is a cybersecurity firm that specializes in providing a range of security services tailored to meet the needs of businesses across multiple sectors, including Automotive, Banking, Financial Services, and Healthcare. With a workforce of approximately 416 employees, the company focuses on Managed Detection & Response, threat intelligence, and penetration testing, helping organizations enhance their security posture against increasingly sophisticated cyber threats. CyberProof operates globally, with a significant presence in India, Israel, and Europe, and collaborates with major technology partners like Microsoft and Google to deliver advanced security solutions. Their services are designed to proactively identify vulnerabilities, manage risks, and ensure compliance with regulatory standards, making them a valuable resource for organizations looking to strengthen their cybersecurity measures.

15. Cujo Ai

• Website: cujo.com
• Ownership type: Venture Capital
• Headquarters: Covina, California, United States (USA)
• Employee distribution: Lithuania 44%, Finland 24%, Israel 13%, Other 18%
• Latest funding: Seed, $225,000, September 2022
• Founded year: 2015
• Headcount: 201-500
• LinkedIn: cujoai

Cujo Ai, founded in 2015 and based in Covina, California, is a cybersecurity and network intelligence firm that specializes in solutions for broadband operators. The company provides a suite of services designed to protect digital environments, including device protection, content access controls, and operational intelligence tools. Cujo Ai's technology leverages artificial intelligence to enhance the security of connected devices and improve network management. With a workforce of approximately 232 employees, the company has a significant international presence, with a notable percentage of its team located in Lithuania, Finland, and Israel. Cujo Ai has received funding, with its latest round occurring in September 2022, which underscores investor confidence in its business model and growth potential. The company has also achieved recognition in the industry, winning multiple awards for its innovative cybersecurity solutions.

16. Armis

• Website: armis.com
• Ownership type: Venture Capital
• Headquarters: San Francisco, California, United States (USA)
• Employee distribution: United States (USA) 48%, Israel 32%, United Kingdom (UK) 5%, Other 14%
• Latest funding: Series D, $200.0M, October 2024
• Founded year: 2015
• Headcount: 501-1000
• LinkedIn: armis-security

Armis is a cybersecurity firm based in San Francisco, California, founded in 2015. The company specializes in asset intelligence solutions, focusing on the security of unmanaged and Internet of Things (IoT) devices. Armis provides a comprehensive platform that includes services for asset management, threat detection, and vulnerability remediation. Their solutions are particularly tailored for industries such as healthcare, manufacturing, and transportation, where the security of connected devices is paramount. The company has received significant venture capital funding, with a recent Series D round raising $200 million in October 2024. This financial support underscores their growth trajectory and commitment to addressing critical cybersecurity challenges. Armis is recognized for its innovative approach to securing the extended attack surface of organizations, making it a notable player in the cybersecurity industry.

17. Expanse

• Website: expanse.co
• Ownership type: Corporate
• Headquarters: San Francisco, California, United States (USA)
• Latest funding: $800.0M, November 2020
• Founded year: 2012
• Headcount: 51-200
• LinkedIn: expanse-inc-10

Expanse, a company founded in 2012 and based in San Francisco, California, operates within the cybersecurity industry with a specific focus on attack surface management. Their technology is designed to help organizations identify and mitigate unknown risks across their digital assets. By continuously scanning the internet, Expanse provides insights into vulnerabilities that may not be monitored by conventional security practices. This proactive approach is essential for businesses looking to enhance their security posture in an era where cyber threats are evolving rapidly. In November 2020, Expanse secured $800 million in funding, underscoring investor confidence in their capabilities and market potential. As part of Palo Alto Networks, Expanse contributes to a broader suite of security solutions aimed at protecting enterprises from a wide array of cyber threats.

18. Illumio

• Website: illumio.com
• Ownership type: Private Equity
• Headquarters: Sunnyvale, California, United States (USA)
• Employee distribution: United States (USA) 80%, United Kingdom (UK) 5%, Japan 2%, Other 12%
• Latest funding: Series E-K, $225.0M, June 2021
• Founded year: 2013
• Headcount: 501-1000
• LinkedIn: illumio

Illumio, founded in 2013 and based in Sunnyvale, California, is a cybersecurity firm that specializes in data center and cloud security. The company focuses on Zero Trust Segmentation, providing solutions designed to help organizations protect their networks from breaches and ransomware attacks. Illumio's offerings include products like Illumio Core, Illumio CloudSecure, and Illumio Endpoint, which are tailored to enhance security across various environments. The company serves a broad spectrum of industries, including banking, healthcare, and manufacturing, demonstrating its capability to address the unique security needs of different sectors. Illumio has garnered significant attention in the cybersecurity community, being recognized as a leader in microsegmentation by Forrester and included in the Gartner Market Guide for Microsegmentation. With 788 employees and a strong presence in the U.S. and internationally, Illumio continues to innovate and expand its influence in the cybersecurity landscape. The company has also attracted substantial investment, with its last funding round raising $225 million in June 2021, reflecting strong market confidence in its strategic direction and product offerings.

19. Western NRG, Inc.

• Website: westernnrg.com
• Ownership type: Private
• Headquarters: Camarillo, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1989
• Headcount: 11-50
• LinkedIn: western-nrg

Western NRG, Inc., founded in 1989 and based in Camarillo, California, is a private cybersecurity firm that focuses on delivering comprehensive internet security solutions to businesses. With a team of 27 employees, the company has carved out a niche in the cybersecurity sector by offering services such as the Ultimate Series and Urgent Care, which provide ongoing management and support for network security. Their expertise lies in configuring and supporting SonicWall security solutions, which are known for their advanced threat detection capabilities. Western NRG serves a variety of sectors, ensuring that organizations of all sizes can access robust cybersecurity measures. Their commitment to customer service and technical support is evident in their 24/7 availability and proactive management of security solutions, making them a reliable partner for businesses looking to safeguard their digital assets.

20. Imperva

• Website: imperva.com
• Ownership type: Corporate
• Headquarters: San Mateo, California, United States (USA)
• Employee distribution: Israel 35%, United States (USA) 21%, India 11%, Other 33%
• Latest funding: $3.6B, July 2023
• Founded year: 2002
• Headcount: 1001-5000
• LinkedIn: imperva

Imperva, Inc., founded in 2002 and based in San Mateo, California, is a cybersecurity firm that focuses on safeguarding enterprise applications and data. The company offers a range of solutions designed to protect against various cyber threats, including web application firewalls, DDoS protection, and data security services. With a workforce of over 1,500 employees, Imperva serves a broad clientele, particularly in sectors such as healthcare and finance, where data security is paramount. The company has made significant strides in the industry, being recognized for its innovative approaches to application and data security. In July 2023, Imperva secured $3.6 billion in funding, underscoring its position as a key player in the cybersecurity market and its commitment to enhancing its offerings.

Network Security Insights: Key Companies in California

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