Company lists · Data refreshed September 2026
Top 25 Cybersecurity firms based in San Jose, United States
RevenueBase identified 66 cybersecurity firms headquartered in San Jose, United States as of September 2026 and tracks 15,606 professional contacts across them, including 3,366 with verified work emails. New York is the largest hub.
This list covers cybersecurity firms headquartered in San Jose, United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 14, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest cybersecurity firms based in San Jose, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 11,169 contacts → | ||||
Strong evidence “Your backstage pass to the most epic cybersecurity solutions on the market for Endpoint, Network, Data and Cloud security.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,181 contacts → | ||||
Indirect evidence “As AI-driven vulnerability and exploitation accelerate attack velocity to machine speed, Forescout is a foundational cyber defense layer that allows organizations to segment and…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 3 | 889 contacts → | ||||
Indirect evidence “Netenrich is redefining security operations by shifting the focus from "efficiency"(speed) to "efficacy"(comprehensive coverage).” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 4 | 651 contacts → | ||||
Strong evidence “Vectra AI is the cybersecurity AI leader in protecting modern networks from modern attacks.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 5 | 287 contacts → | ||||
Indirect evidence “ColorTokens, the leading enterprise microsegmentation company, stops the lateral spread of ransomware and malware within an organization’s diverse network topology.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 6 | 202 contacts → | ||||
Indirect evidence “Concentric AI is intelligent data security made easy.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 7 | 133 contacts → | ||||
Indirect evidence “By shining a bright light on the darkest corners of security operations, Stellar Cyber empowers organizations to see incoming attacks, know how to fight them, and act decisively –…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 8 | 124 contacts → | ||||
Indirect evidence “Axiado is a leading hardware-anchored platform security solutions company deploying a novel, AI-driven approach to platform security against ransomware, supply chain…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 9 | 116 contacts → | ||||
Indirect evidence “NST Cyber is a leading provider of Threat Exposure Management to Global banks and Forbes companies.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 10 | 103 contacts → | ||||
Indirect evidence “FireCompass is an Agentic AI platform for autonomous penetration testing and red teaming across Web, API, and infrastructure.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 11 | 83 contacts → | ||||
Indirect evidence “Balbix enables enterprises to reduce cyber risk faster and prove the impact in business terms.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 12 | 55 contacts → | ||||
Indirect evidence “Axiad is an identity security company tackling the critical threats posed by compromised credentials, which account for over 70% of enterprise breaches.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 13 | 49 contacts → | ||||
Indirect evidence “Quokka discovers and delivers actionable mobile security intelligence to enable proactive remediation of zero-day vulnerabilities, before they become incidents that threaten…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 14 | 44 contacts → | ||||
Indirect evidence “Building an effective cyber security program from scratch is time consuming and expensive.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 15 | 43 contacts → | ||||
Indirect evidence “SecqureOne (SQ1) is a Silicon Valley based end-to-end cyber security and compliance solution provider serving businesses globally over the last 17 years.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 16 | 34 contacts → | ||||
Strong evidence “TruAdvantage is a Bay Area-based, award-winning IT firm that specializes in managed IT, managed Cybersecurity, managed Compliance and Cloud solutions.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 17 | 34 contacts → | ||||
Strong evidence “PRE Security is leading the way to a new era of proactive, predictive cybersecurity with our AI Native Predictive SecOps platform.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 18 | 23 contacts → | ||||
Strong evidence “Firewalla is dedicated to making accessible cybersecurity solutions that are simple, affordable, and powerful.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 19 | 19 contacts → | ||||
Strong evidence “Link11 and Reblaze have united to provide comprehensive, enterprise-grade cybersecurity solutions, making the Internet safer for businesses of all sizes.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 20 | 18 contacts → | ||||
Strong evidence “At Bravo Consulting, we believe that cybersecurity doesn’t have to be complicated.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 21 | 17 contacts → | ||||
Strong evidence “Synqly is building a stronger, more connected cybersecurity integration ecosystem with AI-enabled integrations that remove development barriers and unlock the full potential of…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 22 | 17 contacts → | ||||
Indirect evidence “Apogee Global RMS is a U.S.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 23 | 16 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 24 | 15 contacts → | ||||
Indirect evidence “Sonitrol, Pacific West Security, has more than forty years of success providing verified electronic security solutions for Northern California and Utah businesses.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 25 | 14 contacts → | ||||
Indirect evidence “WHO WE ARE An IT Network Consulting company specializing in network security, network design, implementation and support for Data, Wireless, and Voice networks.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: cybersecurity firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names cybersecurity firms.
- Partial evidence
- Its own public description names part of cybersecurity firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name cybersecurity firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 66 cybersecurity firms based in San Jose, United States
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Cybersecurity firms based in San Jose, United States at a glance
As of Sep 14, 2026Companies by employee count
Email recency for this list is measured across the whole United States list rather than for San Jose, so it is reported there. Company counts and contact totals on this page are exact for San Jose, over 66 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among cybersecurity firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in San Jose, United States whose own description of what they do matches “cybersecurity firms”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names cybersecurity firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among cybersecurity firms, and records with no verified work email. Companies headquartered outside San Jose are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 3,366 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 14, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Cybersecurity firms by metro in the United States
- Cybersecurity firms in New York332
- Cybersecurity firms in Austin182
- Cybersecurity firms in San Francisco182
- Cybersecurity firms in Washington180
- Cybersecurity firms in Atlanta153
- Cybersecurity firms in Houston142
- Cybersecurity firms in Miami142
- Cybersecurity firms in Dallas134
- Cybersecurity firms in Chicago127
- Cybersecurity firms in Tampa116
- Cybersecurity firms in San Diego92
- Cybersecurity firms in Arlington90
- Cybersecurity firms in Boston87
- Cybersecurity firms in Los Angeles87
- Cybersecurity firms in Columbia77
- Cybersecurity firms in Denver77
- Cybersecurity firms in Las Vegas76
- Cybersecurity firms in Orlando75
- Cybersecurity firms in Seattle71
- Cybersecurity firms in Reston69
- Cybersecurity firms in Charlotte67
- Cybersecurity firms in San Jose66
- Cybersecurity firms in San Antonio64
- Cybersecurity firms in Phoenix63
- Cybersecurity firms in Wilmington57
- Cybersecurity firms in Baltimore55
- Cybersecurity firms in Alexandria51
- Cybersecurity firms in Huntsville50
- Cybersecurity firms in Fairfax49
- Cybersecurity firms in Mclean49
- Cybersecurity firms in Sheridan48
- Cybersecurity firms in Portland43
- Cybersecurity firms in Dover42
- Cybersecurity firms in Raleigh42
- Cybersecurity firms in Ashburn41
- Cybersecurity firms in Colorado Springs40
- Cybersecurity firms in Herndon40
- Cybersecurity firms in Philadelphia40
- Cybersecurity firms in Fort Lauderdale39
- Cybersecurity firms in Pittsburgh39
- Cybersecurity firms in Plano38
- Cybersecurity firms in Scottsdale37
- Cybersecurity firms in Palo Alto35
- Cybersecurity firms in Minneapolis34
- Cybersecurity firms in Nashville32
- Cybersecurity firms in Indianapolis30
- Cybersecurity firms in Richmond30
- Cybersecurity firms in Vienna30
- Cybersecurity firms in Alpharetta29
- Cybersecurity firms in Irvine29
- Cybersecurity firms in Columbus28
- Cybersecurity firms in Salt Lake City28
- Cybersecurity firms in Santa Clara28
- Cybersecurity firms in Leesburg26
- Cybersecurity firms in Sunnyvale26
- Cybersecurity firms in Albuquerque25
- Cybersecurity firms in Bethesda25
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names cybersecurity firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many cybersecurity firms are there based in San Jose, United States?
RevenueBase identified 66 cybersecurity firms headquartered in San Jose, United States as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Symantec, headquartered in San Jose, tops this list with the largest team on record.
Which city has the most cybersecurity firms?
New York leads with 332 headquartered companies, followed by Austin (182) and San Francisco (182).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 3,366 verified decision-maker contacts tracked across these 66 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 14, 2026.
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Cybersecurity firms by geography
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.