Company lists · Data refreshed September 2026

Top 25 Cybersecurity systems providers based in San Jose, United States

Name: Cybersecurity systems providers 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 45 companies tracked

RevenueBase identified 45 cybersecurity systems providers headquartered in San Jose, United States as of September 2026 and tracks 14,720 professional contacts across them, including 2,784 with verified work emails. Across the United States, New York is the largest hub for this category (205 companies); San Jose has 45.

This list covers cybersecurity systems providers 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

45Companies

14,720Contacts tracked

2,784Verified emails

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The 25 largest cybersecurity systems providers based in San Jose, United States

Ranked by team size

Top 25 of 45 cybersecurity systems providers 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 systems providers: 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	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
3	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
4	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
5	Netronix Integration	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	201-500	97 contacts →
	Indirect evidence “Founded in 2007, Netronix Integration is built on the premise of our customer comes first approach by leveraging over 25 years of experience by two industry veterans.” Source: RevenueBase Database · checked Sep 28, 2026
6	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
7	Ziontech Solutions INC	Partial evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	51-200	42 contacts →
	Partial 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
8	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
9	Quality LOW Voltage Systems INC	Partial evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	11-50	20 contacts →
	Partial evidence “Established in 2008, Quality Low Voltage Systems is a security systems company founded on the idea of customizable security.” Source: RevenueBase Database · checked Sep 28, 2026
10	Reblaze Part Of Link11	Partial evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	51-200	19 contacts →
	Partial 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 28, 2026
11	Bravo Consulting	Partial evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	11-50	18 contacts →
	Partial evidence “At Bravo Consulting, we believe that cybersecurity doesn’t have to be complicated.” Source: RevenueBase Database · checked Sep 28, 2026
12	Synqly	Partial evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	11-50	17 contacts →
	Partial 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 28, 2026
13	Accend Networks	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 28, 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 28, 2026
14	Genians	Partial evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	51-200	12 contacts →
	Partial evidence “Genians delivers measurable cybersecurity through NAC, EDR, and Universal ZTNA, turning visibility into verified trust and compliance.” Source: RevenueBase Database · checked Sep 28, 2026
15	ITQUE	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 28, 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 28, 2026
16	Cygne Noir Cyber	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 28, 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 28, 2026
17	Cloud 1 Solutions, INC	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	51-200	10 contacts →
	Indirect evidence “Cloud 1 Solutions provides Managed IT and Security Services for your organization.” Source: RevenueBase Database · checked Sep 28, 2026
18	Esudo Technology Solutions	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	1-10	7 contacts →
	Indirect evidence “Businesses of every size, in every industry, are increasingly dependent on technology.” Source: RevenueBase Database · checked Sep 28, 2026
19	Borges Security Systems, INC	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	1-10	7 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
20	Trustlook AI Cybersecurity	Partial evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	11-50	6 contacts →
	Partial evidence “Trustlook is a global leader in next-generation cybersecurity products based on artificial intelligence.” Source: RevenueBase Database · checked Sep 28, 2026
21	Securenomics	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	11-50	5 contacts →
	Indirect evidence “Securenomics is a distributor of Netskope, Cisco Security, Cato Networks and Cyberhaven Security services, empowering channel partners to offer customers the security they need to…” Source: RevenueBase Database · checked Sep 28, 2026
22	Guarded Cyber	Partial evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	1-10	5 contacts →
	Partial evidence “Guarded Cyber is a Veteran Owned Managed Cybersecurity Services Provider that offers more than just technical expertise; we provide peace of mind.” Source: RevenueBase Database · checked Sep 28, 2026
23	Infoguard Cyber Security	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	11-50	4 contacts →
	Indirect evidence “WHAT WE DO We Provide a Comprehensive CYBER SECURITY SOLUTIONS AND CONSULTING SERVICES that Protect organizations information assets against a range of cyber threats & Mitigate…” Source: RevenueBase Database · checked Sep 28, 2026
24	Portal Robotics	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	1-10	3 contacts →
	Indirect evidence “VS Platform-the enterprise control plane for securely deploying and managing AI and applications across distributed edge environments.” Source: RevenueBase Database · checked Sep 28, 2026
25	Doyengc-Apon	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence “Digital Transformation is all about making Company competent enough so that it can en-cash all the digital Moments that come while doing Business.” 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 systems providers. 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 systems providers.
Partial evidence: Its own public description names part of cybersecurity systems providers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity systems providers. 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 45 cybersecurity systems providers based in San Jose, United States

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Cybersecurity systems providers based in San Jose, United States at a glance

As of Sep 28, 2026

18.9%Verified-email coverage

327.1Average 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

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 45 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 systems providers, 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 systems providers”. 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 systems providers), 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 systems providers, 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, 2,784 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 systems providers 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 systems providers, 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 systems providers are there based in San Jose, United States?

RevenueBase identified 45 cybersecurity systems providers 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 systems providers?

New York leads the United States with 205 headquartered companies, followed by Houston (125) and Austin (114). San Jose has 45.

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 2,784 verified decision-maker contacts tracked across these 45 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.

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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.