Company lists · Data refreshed September 2026

Top 25 Cybersecurity businesses based in San Jose, United States

Name: Cybersecurity businesses based in San Jose, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 65 companies tracked

RevenueBase identified 65 cybersecurity businesses headquartered in San Jose, United States as of September 2026 and tracks 15,240 professional contacts across them, including 3,097 with verified work emails. New York is the largest hub.

This list covers cybersecurity businesses 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 21, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 21, 2026 86% judged on-target in blind review

65Companies

15,240Contacts tracked

3,097Verified emails

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The 25 largest cybersecurity businesses based in San Jose, United States

Ranked by team size

Top 25 of 65 cybersecurity businesses based in San Jose, United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity businesses: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Symantec	Strong evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	10001+	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 21, 2026
2	Forescout Technologies INC	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	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 21, 2026
3	Netenrich	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	501-1,000	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 21, 2026
4	Vectra AI	Strong evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	501-1,000	651 contacts →
	Strong evidence “Vectra AI is the cybersecurity AI leader in protecting modern networks from modern attacks.” Source: RevenueBase Database · checked Sep 21, 2026
5	Colortokens INC	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	201-500	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 21, 2026
6	Catalyst Business Partners	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	51-200	172 contacts →
	Indirect evidence “Catalyst is a digital consulting firm headquartered in Silicon Valley, with operations in over 15 countries across EMEA.” Source: RevenueBase Database · checked Sep 21, 2026
7	Axiado Corporation	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	51-200	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 21, 2026
8	Firecompass	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	11-50	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 21, 2026
9	Balbix	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	51-200	83 contacts →
	Indirect evidence “Balbix enables enterprises to reduce cyber risk faster and prove the impact in business terms.” Source: RevenueBase Database · checked Sep 21, 2026
10	Armature Systems	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	11-50	44 contacts →
	Indirect evidence “Building an effective cyber security program from scratch is time consuming and expensive.” Source: RevenueBase Database · checked Sep 21, 2026
11	Secqureone	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	51-200	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 21, 2026
12	Truadvantage	Strong evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	11-50	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 21, 2026
13	PRE Security	Strong evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	11-50	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 21, 2026
14	Firewalla INC	Strong evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	11-50	23 contacts →
	Strong evidence “Firewalla is dedicated to making accessible cybersecurity solutions that are simple, affordable, and powerful.” Source: RevenueBase Database · checked Sep 21, 2026
15	Reblaze Part Of Link11	Strong evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	51-200	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 21, 2026
16	Bravo Consulting	Strong evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	11-50	18 contacts →
	Strong evidence “At Bravo Consulting, we believe that cybersecurity doesn’t have to be complicated.” Source: RevenueBase Database · checked Sep 21, 2026
17	Cornerstone Technologies	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	11-50	17 contacts →
	Indirect evidence “Cornerstone Technologies has a history of innovation, a storied legacy of IT solutions, serving so many to date, and being trusted by some of the largest organizations in the…” Source: RevenueBase Database · checked Sep 21, 2026
18	Synqly	Strong evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	11-50	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 21, 2026
19	Apogee Global RMS	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	11-50	17 contacts →
	Indirect evidence “Apogee Global RMS is a U.S.” Source: RevenueBase Database · checked Sep 21, 2026
20	Quantum Ventura INC	Indirect evidence	San Jose, United StatesHQ checked Sep 21, 2026	1-10	16 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
21	Accend Networks	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	11-50	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 21, 2026
22	Genians	Strong evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	51-200	12 contacts →
	Strong evidence “Genians delivers measurable cybersecurity through NAC, EDR, and Universal ZTNA, turning visibility into verified trust and compliance.” Source: RevenueBase Database · checked Sep 21, 2026
23	ITQUE	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	11-50	11 contacts →
	Indirect evidence “ITque is a leading Managed IT Security & Services Provider specializing in network and data security.” Source: RevenueBase Database · checked Sep 21, 2026
24	Cygne Noir Cyber	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	11-50	11 contacts →
	Indirect evidence “At Cygne Noir Cyber, we believe that security and intelligence go hand in hand.” Source: RevenueBase Database · checked Sep 21, 2026
25	Cloud 1 Solutions, INC	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	51-200	10 contacts →
	Indirect evidence “Cloud 1 Solutions provides Managed IT and Security Services for your organization.” Source: RevenueBase Database · checked Sep 21, 2026

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 businesses. 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 businesses.
Partial evidence: Its own public description names part of cybersecurity businesses, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity businesses. 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 65 cybersecurity businesses based in San Jose, United States

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Cybersecurity businesses based in San Jose, United States at a glance

As of Sep 21, 2026

20.3%Verified-email coverage

234.5Average contacts per company

11-50Median size (employees)

620.0%Largest-city concentration · New York

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

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 65 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 businesses, 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 businesses”. 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 businesses), 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 businesses, 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, 3,097 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 21, 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 businesses by metro in the United States

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 businesses, 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 businesses are there based in San Jose, United States?

RevenueBase identified 65 cybersecurity businesses 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 businesses?

New York leads with 403 headquartered companies, followed by Austin (207) and Washington (203).

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 3,097 verified decision-maker contacts tracked across these 65 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 21, 2026.

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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.