Company lists · Data refreshed September 2026

Top 25 Cybersecurity platform companies based in San Jose, United States

Name: Cybersecurity platform companies 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 28, 2026 76 companies tracked

RevenueBase identified 76 cybersecurity platform companies headquartered in San Jose, United States as of September 2026 and tracks 26,544 professional contacts across them, including 10,221 with verified work emails. Across the United States, New York is the largest hub for this category (246 companies); San Jose has 76.

This list covers cybersecurity platform companies 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 28, 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 28, 2026 86% judged on-target in blind review

76Companies

26,544Contacts tracked

10,221Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest cybersecurity platform companies based in San Jose, United States

Ranked by team size

Top 25 of 76 cybersecurity platform companies based in San Jose, United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity platform companies: 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	Partial evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	10001+	11,169 contacts →
	Partial 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 28, 2026
2	Zscaler	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	5,001-10,000	9,101 contacts →
	Indirect evidence “Zscaler (NASDAQ: ZS) is a pioneer and global leader in zero trust security.” Source: RevenueBase Database · checked Sep 28, 2026
3	Forescout Technologies INC	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 28, 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 28, 2026
4	Netenrich	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 28, 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 28, 2026
5	Vectra AI	Partial evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	501-1,000	651 contacts →
	Partial evidence “Vectra AI is the cybersecurity AI leader in protecting modern networks from modern attacks.” Source: RevenueBase Database · checked Sep 28, 2026
6	Skyhigh Security	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	501-1,000	640 contacts →
	Indirect evidence “Skyhigh Security protects organizations with cloud-native security solutions that are both data-aware and simple to use.” Source: RevenueBase Database · checked Sep 28, 2026
7	Securiti	Partial evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	501-1,000	638 contacts →
	Partial evidence “Securiti is the pioneer of the Data Command Center, a centralized platform that enables the safe use of data and GenAI.” Source: RevenueBase Database · checked Sep 28, 2026
8	Colortokens INC	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 28, 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 28, 2026
9	Noname Security	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	201-500	232 contacts →
	Indirect evidence “Noname Security is the only company taking a complete, proactive approach to API Security.” Source: RevenueBase Database · checked Sep 28, 2026
10	Concentric AI	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	201-500	202 contacts →
	Indirect evidence “Concentric AI is intelligent data security made easy.” Source: RevenueBase Database · checked Sep 28, 2026
11	Stellar Cyber	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	51-200	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 28, 2026
12	Safetica	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	51-200	133 contacts →
	Indirect evidence “Safetica delivers Intelligent Data Security for modern organizations that need to protect sensitive data, reduce insider risk, and ensure regulatory compliance-without disrupting…” Source: RevenueBase Database · checked Sep 28, 2026
13	Axiado Corporation	Partial evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	51-200	124 contacts →
	Partial 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 28, 2026
14	NST Cyber	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	51-200	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 28, 2026
15	Elisity	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	51-200	114 contacts →
	Indirect evidence “Elisity is a leap forward in network segmentation architecture and is leading the enterprise effort to achieve Zero Trust maturity, proactively prevent security risks, and reduce…” Source: RevenueBase Database · checked Sep 28, 2026
16	Firecompass	Partial evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	11-50	103 contacts →
	Partial evidence “FireCompass is an Agentic AI platform for autonomous penetration testing and red teaming across Web, API, and infrastructure.” Source: RevenueBase Database · checked Sep 28, 2026
17	Whitehat Dynamic By Synopsys	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	201-500	89 contacts →
	Indirect evidence “NTT Application Security is driving the future of application security.” Source: RevenueBase Database · checked Sep 28, 2026
18	Balbix	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 28, 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 28, 2026
19	Exaforce	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	51-200	81 contacts →
	Indirect evidence “At Exaforce, we are on a mission to 10x the productivity and efficacy of security and operations (SOC) teams using our transformative multi-model AI engine.” Source: RevenueBase Database · checked Sep 28, 2026
20	quokka.io	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	11-50	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 28, 2026
21	Armature Systems	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 28, 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 28, 2026
22	Secqureone	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 28, 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 28, 2026
23	Ziontech Solutions INC	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	51-200	42 contacts →
	Indirect evidence “Ziontech is a trusted, security focused, end to end systems integrator; implementing strategic and flexible solution, customized to customer’s need with a wide enterprise security…” Source: RevenueBase Database · checked Sep 28, 2026
24	PRE Security	Strong evidence	San Jose, CA, United StatesHQ checked Sep 28, 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 28, 2026
25	Firewalla INC	Partial evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	11-50	23 contacts →
	Partial evidence “Firewalla is dedicated to making accessible cybersecurity solutions that are simple, affordable, and powerful.” Source: RevenueBase Database · checked Sep 28, 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 platform companies. 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 platform companies.
Partial evidence: Its own public description names part of cybersecurity platform companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity platform companies. 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 76 cybersecurity platform companies based in San Jose, United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 10,221 reachable decision-makers.

Free signup · no credit card

View the full list →

Cybersecurity platform companies based in San Jose, United States at a glance

As of Sep 28, 2026

38.5%Verified-email coverage

349.3Average contacts per company

11-50Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 76 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 platform companies, 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 platform companies”. 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 platform companies), 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 platform companies, 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, 10,221 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 28, 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 platform companies 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 platform companies, 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 platform companies are there based in San Jose, United States?

RevenueBase identified 76 cybersecurity platform companies 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 in the United States has the most cybersecurity platform companies?

New York leads the United States with 246 headquartered companies, followed by San Francisco (161) and Austin (147). San Jose has 76.

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 10,221 verified decision-maker contacts tracked across these 76 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 28, 2026.

Ready to reach these companies? Verified emails and direct dials for all 76 cybersecurity platform companies based in San Jose, United States. Start with a free account, no credit card.

Download this list →

Related lists

Cybersecurity platform companies by geography

Browse the directory

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.