Top 100 cybersecurity companies in California (2026 list)

#	Company	Industry	Headquarters	Employees	Founded
1	Cisco cisco.com A technology company founded in 1984, specializing in hardware, software, and services for Internet solutions and networking technologies	Software Development	🇺🇸 San Jose	95,899	1984
2	Broadcom broadcom.com A leading global infrastructure technology company with a rich history of innovation, collaboration, and engineering excellence spanning over 60 years	Semiconductor Manufacturing	🇺🇸 Palo Alto	54,926	n/a
3	Palo Alto Networks paloaltonetworks.com A global cybersecurity leader addressing security challenges through continuous innovation with artificial intelligence, analytics, automation, and orchestration for organizations worldwide	Computer and Network Security	🇺🇸 Santa Clara	22,680	2005
4	Broadcom Software broadcom.com Global software leader optimizing and protecting complex hybrid environments for multinational companies with industry-leading business-critical software, enabling scalability, agility, and security	Software Development	🇺🇸 San Jose	17,981	n/a
5	Fortinet fortinet.com Fortinet enables trust in the digital world by protecting people, devices, and data for enterprises, service providers, and government organizations	Computer and Network Security	🇺🇸 Sunnyvale	16,304	2000
6	Keysight Technologies keysight.com Empowers innovators to explore, design, and bring world-changing technologies to life by solving design, emulation, and test challenges to help create the best product experiences	Appliances, Electrical, and Electronics Manufacturing	🇺🇸 Santa Rosa	13,893	n/a
7	Protiviti protiviti.com Global consulting firm offering expertise in finance, technology, operations, data, digital, legal, HR, risk, and internal audit to help clients navigate future challenges	Business Consulting and Services	🇺🇸 Menlo Park	13,479	2002
8	Symantec broadcom.com It offers comprehensive cybersecurity solutions for Endpoint, Network, Data, and Cloud security, catering to both individuals and enterprises.	Software Development	🇺🇸 San Jose	12,852	1982
9	Juniper Networks juniper.net Develops intelligent, agile, and secure networking products and solutions serving global service providers, enterprises, and government organizations worldwide.	Software Development	🇺🇸 Sunnyvale	9,059	1996
10	Zscaler zscaler.com Leading organization enabling secure network and application transformation for mobile and cloud-first world, offering fast, secure, cloud-delivered services globally for enhanced cybersecurity	Computer and Network Security	🇺🇸 San Jose	8,865	2007
11	Splunk splunk.com Providing organizations with a unified security and observability platform to ensure operational resilience in the face of digital disruptions	Software Development	🇺🇸 San Francisco	8,820	n/a
12	Check Point Software checkpoint.com Leading provider of cyber security solutions globally, protecting over 100,000 customers with industry-leading malware, ransomware, and threat prevention Specializes in multi-level security architecture	Computer and Network Security	🇺🇸 Redwood City	8,546	1993
13	Cohesity cohesity.com The company offers data protection and insights through a hyper-scale platform, AI-powered intelligence, zero trust security, third-party extensibility, and high customer satisfaction	Software Development	🇺🇸 Santa Clara	7,759	2013
14	Okta okta.com A platform that prioritizes identity management by offering neutrality, power, and flexibility, tailored to various industries, use cases, and support levels	Software Development	🇺🇸 San Francisco	7,522	2009
15	Cloudflare cloudflare.com The company is a leading connectivity cloud provider, empowering organizations to enhance speed and security while reducing complexity and cost	Computer and Network Security	🇺🇸 San Francisco	7,489	2009
16	HackerOne hackerone.com A global leader in human-powered security, leveraging human ingenuity and AI to find critical security flaws and reduce threat exposure	Computer and Network Security	🇺🇸 San Francisco	7,165	2012
17	Viasat viasat.com Global communications company providing connectivity solutions for consumers, businesses, governments, and militaries worldwide, ensuring internet access in remote locations and on-the-go	Telecommunications	🇺🇸 Carlsbad	6,809	1986
18	McAfee mcafee.com This company is focused on creating innovative solutions for online protection, allowing people to enjoy a safe online experience with confidence	Computer and Network Security	🇺🇸 San Jose	5,555	n/a
19	Proofpoint proofpoint.com A company specializing in cybersecurity and compliance solutions, protecting people across email, web, cloud, and social media channels effectively	Computer and Network Security	🇺🇸 Sunnyvale	5,200	n/a
20	Rubrik rubrik.com A company specializing in Zero Trust Data Security, offering solutions such as data protection, ransomware investigation, and application recovery to ensure operational resilience	Software Development	🇺🇸 Palo Alto	5,113	2014
21	Elastic elastic.co This company specializes in Enterprise Search, Observability, and Security solutions to enhance customer and employee experiences, ensure smooth application performance, and protect against cyber threats	Software Development	🇺🇸 San Francisco	5,089	n/a
22	Bugcrowd bugcrowd.com Connects organizations with trusted hackers via an AI-powered platform to proactively protect digital assets from advanced threats before attacks occur, ensuring continuous security.	Computer and Network Security	🇺🇸 San Francisco	3,740	2012
23	Qualys qualys.com Provides disruptive cloud-based security, compliance and IT solutions, streamlining and automating security and compliance onto a single platform for organizations worldwide.	Computer and Network Security	🇺🇸 Foster City	3,647	1999
24	Netskope netskope.com Provides optimized access and real-time, context-based security for cloud and AI ecosystems, including agents, applications, tools, LLMs, people, devices, and data.	Computer and Network Security	🇺🇸 Santa Clara	3,395	2012
25	Infoblox infoblox.com This company combines networking and security to offer superior performance and protection, ensuring real-time visibility and control over network connections for faster operations and threat prevention	Computer and Network Security	🇺🇸 Santa Clara	3,309	1999
26	Confidencial.io confidencial.io Development of patented AI and encryption technologies for automatic identification, classification, and protection of sensitive data in regulated industries.	Data Security Software Products	🇺🇸 Menlo Park	3,195	2021
27	SentinelOne sentinelone.com Provides AI-powered cybersecurity platform, revolutionizing security operations with Endpoint Protection, SIEM, Cloud Security, Identity Threat Detection, and managed threat services.	Computer and Network Security	🇺🇸 Mountain View	3,166	2013
28	Omnissa omnissa.com Provides a digital work platform for secure, personalized employee experiences, unifying and automating digital workspaces for optimal user experience and security.	Software Development	🇺🇸 Mountain View	2,714	n/a
29	JFrog jfrog.com This company provides a software supply chain platform for automating trusted releases with end-to-end visibility, security, and control	Software Development	🇺🇸 Sunnyvale	2,417	2008
30	Barracuda barracuda.com Provides comprehensive cybersecurity protection for businesses of all sizes. Offers AI-powered platform securing email, data, applications, and networks with managed XDR and centralized management.	Computer and Network Security	🇺🇸 Campbell	2,263	n/a
31	Good Powered by BlackBerry blackberry.com Provider of secure mobile solutions including device management, collaboration apps, and analytics for enterprises and governments worldwide.	Wireless Services	🇺🇸 Sunnyvale	2,065	1996
32	Mobileum mobileum.com A leading provider of telecom analytics and testing solutions for roaming, security, risk management to increase revenues, improve network security, and reduce costs	Telecommunications	🇺🇸 Cupertino	1,970	n/a
33	SonicWall sonicwall.com Provides real-time protection against cyberattacks across cloud, hybrid, and traditional environments for remote, mobile, and cloud-enabled users, serving enterprise, government, and SMBs.	Computer and Network Security	🇺🇸 Milpitas	1,954	1991
34	NIC nicitpartner.com A leading provider of IT solutions, cybersecurity, and cloud services for businesses and organizations, with a focus on customer service and adapting to client needs	IT Services and IT Consulting	🇺🇸 Los Angeles	1,923	2002
35	Vanta vanta.com Automates compliance, manages risk, and proves trust for businesses through an AI-powered platform, offering tools for audits, vendor risk, and security questionnaires.	Software Development	🇺🇸 San Francisco	1,882	2018
36	TAO Digital Solutions taodigitalsolutions.com An IT services provider supporting enterprise clients with digital solutions, consulting, design, and re-engineering skills to drive innovation and business value	IT Services and IT Consulting	🇺🇸 Santa Clara	1,868	2022
37	Mozilla mozilla.org This company designs, builds, and distributes software (including the Firefox browser) to ensure an open and accessible internet for all	Software Development	🇺🇸 San Francisco	1,766	2005
38	Saviynt saviynt.com AI-powered identity platform manages and governs human and non-human access to applications, data, and business processes, safeguarding digital assets, driving operational efficiency, and reducing compliance costs.	Software Development	🇺🇸 El Segundo	1,646	2010
39	Acrisure acrisure.com Established in 1972, we are one of California's largest independent insurance brokerage firms specializing in commercial insurance, surety, and employee benefits services	Insurance	🇺🇸 Canoga Park	1,455	1972
40	Mandiant (part of Google Cloud)cloud.google.com Dedicated to making organizations secure against cyber threats and confident in their readiness through trusted cybersecurity solutions, now from Google Cloud.	Computer and Network Security	🇺🇸 Mountain View	1,454	2004
41	Fastly fastly.com Enhance websites and applications by leveraging Fastly's edge cloud platform, catering to popular brands like Reddit, Pinterest, and Stripe	Software Development	🇺🇸 San Francisco	1,415	2011
42	Druva druva.com Leading provider of data security solutions, empowering customers to secure and recover their data from all threats with a fully managed SaaS platform.	Software Development	🇺🇸 Santa Clara	1,372	2008
43	Nile nilesecure.com Pioneer and leader in Secure Networking-as-a-Service, delivering zero-trust, autonomous operations and cloud solutions for radical operational simplicity, security, speed, and stellar user experiences.	Computer and Network Security	🇺🇸 San Jose	1,355	2018
44	Forescout Technologies Inc.forescout.com Provides comprehensive asset intelligence, continuous assessment, and ongoing control over all managed and unmanaged assets across IT, OT, IoT, and IoMT environments.	Computer and Network Security	🇺🇸 San Jose	1,328	2000
45	Safe Security safe.security Reinvents cyber risk management using Agentic AI, automating understanding, prioritization, and management of enterprise, third-party, and AI-related cyber risks.	Computer and Network Security	🇺🇸 Palo Alto	1,241	2012
46	WSO2 wso2.com Provides foundational open source platforms for enterprises to build, integrate, and scale AI-first experiences, securing digital identities and accelerating innovation.	Software Development	🇺🇸 Santa Clara	1,239	2005
47	Cribl cribl.io Cribl empowers tech professionals with open observability solutions, offering freedom and flexibility to control data flow and maximize investments	Software Development	🇺🇸 San Francisco	1,226	2018
48	Securiti AI securiti.ai A pioneering platform for safe data use and GenAI, providing data intelligence, controls, and orchestration for global enterprises' security, privacy, governance, and compliance	Data Security Software Products	🇺🇸 San Jose	1,177	2019
49	Rambus rambus.com Innovative hardware, software, and services for faster, safer data processing Specializing in memory, interfaces, security, and emerging technologies for diverse applications	Semiconductor Manufacturing	🇺🇸 San Jose	1,152	1990
50	Armis armis.com Protects entire attack surface, manages cyber risk exposure in real time for critical assets, ensuring continuous visibility and security across all environments.	Computer and Network Security	🇺🇸 San Francisco	1,083	2015
51	Crest Data crestdata.ai A leading provider of custom solutions in Data Analytics, Cyber Security, ITOps/AIOps, DevOps, and Cloud, serving Fortune 500 companies and Silicon Valley startups	Technology, Information and Internet	🇺🇸 San Jose	1,032	2013
52	Illumio illumio.com Leading ransomware, breach containment; redefining cyberattack containment, operational resilience; AI security graph identifies, contains threats across hybrid multi-cloud environments; stopping attack spread.	Computer and Network Security	🇺🇸 Sunnyvale	916	2013
53	Netenrich netenrich.com Redefines security operations, focusing on comprehensive coverage and situational awareness for CxOs, using AI-powered platform to deliver measurable efficacy outcomes.	Computer and Network Security	🇺🇸 San Jose	896	2004
54	Versa Networks versa-networks.com Enables organizations with self-protecting networks by converging security, SD-WAN, and SD-LAN solutions, powered by AI, for data protection and cyber defense.	Software Development	🇺🇸 Santa Clara	876	2012
55	Sumo Logic sumologic.com Unifies critical security and operational data through an Intelligent Operations Platform to help digital teams detect, investigate, and resolve modern cybersecurity and cloud challenges.	Software Development	🇺🇸 Redwood City	841	2010
56	FireEye, Inc. Formed from a merger of two trusted cybersecurity leaders, providing cybersecurity content and solutions to address industry challenges.	Computer and Network Security	🇺🇸 Milpitas	806	2004
57	Mitek Systems miteksystems.com A global leader in digital access, using advanced identity verification technologies to make digital access faster, more secure, and compliant	Computer and Network Security	🇺🇸 San Diego	763	1985
58	A10 Networks, Inc a10networks.com Provider of security and infrastructure solutions for on-premises, hybrid cloud, and edge-cloud environments with a global customer base of large enterprises and service providers	Software Development	🇺🇸 San Jose	763	2004
59	Skyhigh Security skyhighsecurity.com Provides cloud-native security solutions, data-aware and simple to use. Its SSE portfolio focuses on data use, allowing secure collaboration from anywhere.	Software Development	🇺🇸 San Jose	738	2022
60	One Identity oneidentity.com Unifying identity governance, privileged access, and access management for organizations; strengthens identity perimeter, protects against breaches, ensures governance and compliance.	Software Development	🇺🇸 Aliso Viejo	737	n/a
61	Coalition, Inc.coalitioninc.com A pioneering Active Insurance provider combining coverage and cybersecurity tools to proactively manage and mitigate digital risks for businesses globally	Insurance	🇺🇸 San Francisco	708	2017
62	Vectra AI vectra.ai Protects modern networks from modern attacks. Helps security leaders understand networks, detects and stops attacks across hybrid environments, reduces cyber risk with AI-driven threat detection.	Computer and Network Security	🇺🇸 San Jose	684	2011
63	Google Cloud Security cloud.google.com Provides comprehensive cybersecurity solutions to organizations, addressing security challenges with AI-powered capabilities, Mandiant intelligence, and a secure cloud foundation.	Computer and Network Security	🇺🇸 Mountain View	682	2018
64	Incode incode.com Provides an AI-driven platform for accurate identity verification, automating security, maximizing conversions, and preventing fraud for enterprises across various industries.	Software Development	🇺🇸 San Francisco	665	2015
65	NuSummit Cybersecurity Pure-play cybersecurity services company with deep expertise in Identity and Access Management, Risk Advisory, Security Verification, Managed Detection, Response, and Security Engineering.	Computer and Network Security	🇺🇸	622	n/a
66	Sysdig sysdig.com Helps security, development teams prevent, detect, respond cloud threats, with real-time defense, correlating signals across workloads, identities, services, exposing hidden attack paths, active risk.	Computer and Network Security	🇺🇸 San Francisco	619	2013
67	TelePacific Communications (TPx Communications)tpx.com TelePacific company is now TPx Communications, providing news and updates on their services Visit their LinkedIn page for more information	Telecommunications	🇺🇸 Los Angeles	616	1998
68	Jumio Corporation jumio.com Provides AI-powered identity intelligence, anchored in biometric authentication and automation, to establish and maintain trust for organizations and fight fraud.	Software Development	🇺🇸 Sunnyvale	613	2010
69	Cobalt cobalt.io Pioneering pentesting as a service, combining talent and technology for fast, scalable offensive security. Helps organizations identify and fix vulnerabilities, accelerating risk mitigation.	Computer and Network Security	🇺🇸 San Francisco	593	2013
70	Malwarebytes malwarebytes.com Safeguards devices, data, and individuals from online threats. Provides cybersecurity, privacy, and identity solutions, empowering digital lives free from scams.	Computer and Network Security	🇺🇸 Santa Clara	587	2008
71	FirmGuard firmguard.com A pioneering firmware provider since 1979, specializing in designing, developing, and securing firmware for various computing devices worldwide	Computer and Network Security	🇺🇸 Campbell	582	1979
72	ISSQUARED, Inc.issquaredinc.com A global provider of digital transformation solutions in cybersecurity, cloud infrastructure, and managed services, with certifications in global standards and industry accolades	IT Services and IT Consulting	🇺🇸 Westlake Village	581	2010
73	42Gears 42gears.com A leading provider of Unified Endpoint Management solutions for securing, monitoring, and managing various devices, with a global customer base	Mobile Computing Software Products	🇺🇸 Milpitas	569	2009
74	Aryaka aryaka.com Pioneering leader in cloud-first, software-defined networking and security solutions, offering Unified SASE as a Service for global businesses.	Computer and Network Security	🇺🇸 Santa Clara	555	2009
75	Aujas Cybersecurity cybersecurity.nusummit.com Specializes in building and transforming cybersecurity postures to help businesses mitigate risks, enhance resilience, minimize attacks, and foster innovation and growth.	Computer and Network Security	🇺🇸 Cupertino	548	2008
76	Telesign telesign.com Provides Continuous Trust™ to global enterprises by verifying phone numbers, preventing fraud, securing communications, and enabling confident engagement in the digital economy	IT Services and IT Consulting	🇺🇸 Marina del Rey	528	2005
77	Hexnode hexnode.com Offers AI-powered solutions to streamline endpoint management, user identity, and threat defense for businesses, improving visibility, control, and compliance.	Software Development	🇺🇸 San Francisco	512	2013
78	Gruve gruve.ai Privately held company focused on developing software with AI, ML, and data, using the Norwegian term "To Mine" as inspiration	IT Services and IT Consulting	🇺🇸 Redwood City	506	2024
79	Seclore seclore.com Seclore protects sensitive data for enterprises, preventing data theft and ensuring compliance by controlling access to digital assets both inside and outside organizations	Data Security Software Products	🇺🇸 Santa Clara	496	2010
80	Renovo Solutions renovo1.com Provider of Healthcare Technology Management programs offering biomedical imaging services, cybersecurity solutions, equipment maintenance cost reduction, technology management consultation, and unbiased capital equipment planning	Hospitals and Health Care	🇺🇸 Irvine	491	2009
81	Cybereason, A LevelBlue Company cybereason.com delivers advanced endpoint detection and response and consulting services. These empower organizations to harden, respond, and recover from cyber threats effectively.	Computer and Network Security	🇺🇸 San Diego	475	2012
82	VGS vgs.io A leading cloud-based tokenization platform offering solutions for PCI descoping, payments orchestration, and transaction data consolidation to protect sensitive financial information	Financial Services	🇺🇸 San Francisco	471	2015
83	Keysight Network Visibility Test & Security keysight.com The company provides network security solutions, offering tools to test infrastructure, validate security, and gain visibility into network traffic for safe and reliable networks	Software Development	🇺🇸 Calabasas	458	n/a
84	Upwind Security upwind.io Bridges cloud intelligence from runtime to build-time, eliminating friction and boosting productivity for developers, security engineers, and DevOps. Delivers comprehensive cloud security.	Computer and Network Security	🇺🇸 San Francisco	449	2022
85	Cogent thalesgroup.com Cogent business, now part of Thales Group, specializes in digital identity and security solutions Visit Thales Digital Identity & Security for updates	IT Services and IT Consulting	🇺🇸 Pasadena	444	1990
86	TRM Labs trmlabs.com A blockchain intelligence company detecting and investigating crypto-related financial crime and fraud to safeguard the financial system	Information Services	🇺🇸 San Francisco	423	2018
87	Nozomi Networks nozominetworks.com Protects critical infrastructure from cyber threats using network, endpoint visibility, threat detection, and AI analysis for faster incident response.	Computer and Network Security	🇺🇸 San Francisco	392	2013
88	Hillstone Networks hillstonenet.com Delivers comprehensive cybersecurity solutions to enterprises, securing critical assets and infrastructure from edge to cloud, recognized for network firewalls.	Computer and Network Security	🇺🇸 Santa Clara	367	2006
89	Sardine sardine.ai A leading company in financial crime prevention, using advanced technology to detect and prevent fraud, money laundering, and other illicit activities for over 250 clients	Financial Services	🇺🇸 San Francisco	334	2020
90	Anomali anomali.com Delivers an intelligence-native SOC platform, unifying a hyperscale security data lake, threat intelligence, and AI-driven automation for modern security operations.	Computer and Network Security	🇺🇸 Redwood City	305	2013
91	Hirsch USA hirschsecure.com Global leader in authentication and security solutions, specializing in frictionless access, protecting identities, securing IP, driving IoT innovation, and digitally securing the physical world	Security Systems Services	🇺🇸 Santa Ana	302	1981
92	Cyberhaven cyberhaven.com Protects sensitive data everywhere, unifying data security platform functionalities like DSPM, DLP, insider risk management, and AI security with data lineage.	Computer and Network Security	🇺🇸 Palo Alto	292	2016
93	AutoRABIT autorabit.com AutoRABIT provides DevSecOps tools for Salesforce developers to increase release velocity, improve code quality, enhance data security, and optimize development processes	Software Development	🇺🇸 San Francisco	277	2015
94	Zluri zluri.com It provides a platform for identity governance, streamlining access management, and automating access reviews for compliance and security purposes.	Technology, Information and Internet	🇺🇸 San Francisco	269	2020
95	Green Hills Software ghs.com A worldwide leader in embedded safety and security solutions, specializing in high-reliability applications for various industries with industry-certified products and services	Software Development	🇺🇸 Santa Barbara	264	1982
96	Semgrep semgrep.dev Provides code security platform unifying SAST, SCA, and secrets scanning, embedding protection directly into development workflow, uncovering and fixing real vulnerabilities faster.	Software Development	🇺🇸 San Francisco	264	2017
97	Sift sift.com Leading fraud prevention platform, delivering digital trust to global brands, stopping fraud, enabling customer experience excellence, converting risk to revenue.	Computer and Network Security	🇺🇸 San Francisco	263	2011
98	Array Networks arraynetworks.com Provides application delivery and security solutions to maximize employee productivity, ensure availability, optimize user experience, and protect infrastructure from attacks and data leakage.	Computer and Network Security	🇺🇸 Milpitas	261	2000
99	Obsidian Security obsidiansecurity.com Protects business-critical applications by mitigating threats and reducing risk. This is the first truly comprehensive security solution for SaaS applications.	Computer and Network Security	🇺🇸 Palo Alto	260	2017
100	EVOTEK evotek.com A leading digital business enabler offering innovative technology solutions in data center, cloud, cybersecurity, mobility, platform engineering, and AIOps services	IT Services and IT Consulting	🇺🇸 Solana Beach	257	2014

Turn this list into pipeline

Tamtam finds the decision-makers at every company on a list like this one, with verified emails, phone numbers and the buying signals that tell you when to reach out.

Build your own list, free

How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Oct 24, 2026.

Top 100 cybersecurity companies in California

Turn this list into pipeline

How this list is built

More company lists in California

The same list elsewhere in United States