Company lists · Data refreshed September 2026
Top 25 IT infrastructure and security companies based in San Jose, United States
RevenueBase identified 96 IT infrastructure and security companies headquartered in San Jose, United States as of September 2026 and tracks 15,173 professional contacts across them, including 2,587 with verified work emails. Across the United States, New York is the largest hub for this category (457 companies); San Jose has 96.
This list covers IT infrastructure and security 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 27, 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 IT infrastructure and security companies based in San Jose, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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 27, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,119 contacts → | ||||
Indirect evidence “Crest Data is a data and AI-driven technology solutions provider helping global enterprises and technology innovators accelerate digital evolution across Cybersecurity and…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 3 | 816 contacts → | ||||
Indirect evidence “Our world is increasing in complexity.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 4 | 673 contacts → | ||||
Strong evidence “A10 Networks provides security and infrastructure solutions for on-premises, hybrid cloud, and edge-cloud environments.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 5 | 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 27, 2026Thanks. The Data Team will review it. | |||||
| 6 | 99 contacts → | ||||
Partial evidence “ZAG Technical Services was founded in 1998 as a trusted IT adviser and partner to our clients.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 7 | 79 contacts → | ||||
Partial evidence “MotivIT is a Silicon Valley-based, SOC 2 certified managed IT service provider delivering expert IT support, small business IT help, and global IT outsourcing solutions.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 8 | 63 contacts → | ||||
Indirect evidence “Opal Soft is a professional services company focused in information technology.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 9 | 60 contacts → | ||||
Strong evidence “National It Consulting - Onsite and Remote Support - Microsoft and Cisco Certified Experts - Windows, Linux, and Mac OS Technical Support - Network Security and Compliance - IT…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 10 | 47 contacts → | ||||
Indirect evidence “Veritas Managed Solutions, headquartered in Santa Clara, California, is a leading turnkey network installation company with a rich history spanning over 40 years of experience in…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 11 | 47 contacts → | ||||
Indirect evidence “Advantel Networks is a premier technology solutions provider; designing, implementing and maintaining solutions for customers worldwide.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 12 | 43 contacts → | ||||
Partial 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 27, 2026Thanks. The Data Team will review it. | |||||
| 13 | 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 27, 2026Thanks. The Data Team will review it. | |||||
| 14 | 39 contacts → | ||||
Partial evidence “Crest Data Systems is a leading provider of custom solutions in the areas of Data Analytics, Cyber Security, ITOps/AIOps, DevOps, and Cloud based in the Bay Area, California.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 15 | 34 contacts → | ||||
Partial 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 27, 2026Thanks. The Data Team will review it. | |||||
| 16 | 34 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 17 | 23 contacts → | ||||
Indirect evidence “BESHTON SOFTWARE INC is an information technology and services company based out of 1362 OAK KNOLL DR, SAN JOSE, California, United States.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 18 | 23 contacts → | ||||
Partial evidence “About Stallion SI Technologies Delivery-first IT engineering for secure, scalable, real-world environments Stallion SI Technologies is a delivery-first IT professional services…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 19 | 21 contacts → | ||||
Indirect evidence “Since 1996, UIS Technology Partners has proven to be an industry leading provider of Information Technology services to small, mid-market, enterprise, and non-profit businesses…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 20 | 19 contacts → | ||||
Indirect 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 27, 2026Thanks. The Data Team will review it. | |||||
| 21 | 17 contacts → | ||||
Partial 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 27, 2026Thanks. The Data Team will review it. | |||||
| 22 | 17 contacts → | ||||
Indirect evidence “Apogee Global RMS is a U.S.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 23 | 16 contacts → | ||||
Partial evidence “Nevtec provides IT Managed & Consulting Services for small to medium sized businesses.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 24 | 15 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 25 | 14 contacts → | ||||
Partial evidence “SJULTRA is a Cloud Security Consulting firm based in California.” Source: RevenueBase Database · checked Sep 27, 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: IT infrastructure and security 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 IT infrastructure and security companies.
- Partial evidence
- Its own public description names part of IT infrastructure and security companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name IT infrastructure and security 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 96 IT infrastructure and security companies based in San Jose, United States
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IT infrastructure and security companies based in San Jose, United States at a glance
As of Sep 27, 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 96 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 IT infrastructure and security 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 “IT infrastructure and security 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 IT infrastructure and security 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 IT infrastructure and security 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, 2,587 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 27, 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.
IT infrastructure and security companies by metro in the United States
- IT infrastructure and security companies in New York457
- IT infrastructure and security companies in Houston320
- IT infrastructure and security companies in Dallas216
- IT infrastructure and security companies in Atlanta214
- IT infrastructure and security companies in Austin208
- IT infrastructure and security companies in Chicago207
- IT infrastructure and security companies in Miami194
- IT infrastructure and security companies in Los Angeles161
- IT infrastructure and security companies in San Diego133
- IT infrastructure and security companies in Washington133
- IT infrastructure and security companies in San Francisco130
- IT infrastructure and security companies in Tampa130
- IT infrastructure and security companies in Denver114
- IT infrastructure and security companies in Charlotte113
- IT infrastructure and security companies in Orlando102
- IT infrastructure and security companies in Phoenix98
- IT infrastructure and security companies in Irvine97
- IT infrastructure and security companies in San Antonio94
- IT infrastructure and security companies in Las Vegas93
- IT infrastructure and security companies in Plano86
- IT infrastructure and security companies in Arlington85
- IT infrastructure and security companies in Columbia82
- IT infrastructure and security companies in Seattle79
- IT infrastructure and security companies in Boston74
- IT infrastructure and security companies in Frisco73
- IT infrastructure and security companies in Sheridan73
- IT infrastructure and security companies in Indianapolis69
- IT infrastructure and security companies in Wilmington69
- IT infrastructure and security companies in Herndon68
- IT infrastructure and security companies in Irving68
- IT infrastructure and security companies in Fort Lauderdale63
- IT infrastructure and security companies in Richmond63
- IT infrastructure and security companies in Reston62
- IT infrastructure and security companies in Ashburn61
- IT infrastructure and security companies in Columbus61
- IT infrastructure and security companies in Fairfax61
- IT infrastructure and security companies in Raleigh61
- IT infrastructure and security companies in Portland60
- IT infrastructure and security companies in Alpharetta56
- IT infrastructure and security companies in Mclean56
- IT infrastructure and security companies in Alexandria55
- IT infrastructure and security companies in Minneapolis55
- IT infrastructure and security companies in Cincinnati53
- IT infrastructure and security companies in Baltimore50
- IT infrastructure and security companies in Nashville48
- IT infrastructure and security companies in Scottsdale48
- IT infrastructure and security companies in Jacksonville47
- IT infrastructure and security companies in Newark46
- IT infrastructure and security companies in Pittsburgh46
- IT infrastructure and security companies in Rockville45
- IT infrastructure and security companies in Sacramento45
- IT infrastructure and security companies in Boca Raton43
- IT infrastructure and security companies in Louisville43
- IT infrastructure and security companies in Salt Lake City41
- IT infrastructure and security companies in Dover40
- IT infrastructure and security companies in Santa Clara39
- IT infrastructure and security companies in Springfield39
- IT infrastructure and security companies in Greenville38
- IT infrastructure and security companies in Philadelphia38
- IT infrastructure and security companies in Princeton38
- IT infrastructure and security companies in Troy38
- IT infrastructure and security companies in Kansas City36
- IT infrastructure and security companies in Leesburg36
- IT infrastructure and security companies in Albuquerque35
- IT infrastructure and security companies in Naperville35
- IT infrastructure and security companies in Schaumburg35
- IT infrastructure and security companies in Birmingham34
- IT infrastructure and security companies in Knoxville34
- IT infrastructure and security companies in Oklahoma City34
- IT infrastructure and security companies in Colorado Springs33
- IT infrastructure and security companies in Fort Worth33
- IT infrastructure and security companies in Omaha33
- IT infrastructure and security companies in Baton Rouge32
- IT infrastructure and security companies in St Louis32
- IT infrastructure and security companies in Tucson32
- IT infrastructure and security companies in Chantilly31
- IT infrastructure and security companies in Rochester30
- IT infrastructure and security companies in Vienna30
- IT infrastructure and security companies in Cleveland29
- IT infrastructure and security companies in Grand Rapids29
- IT infrastructure and security companies in West Palm Beach29
- IT infrastructure and security companies in Bellevue28
- IT infrastructure and security companies in Huntsville28
- IT infrastructure and security companies in Mckinney28
- IT infrastructure and security companies in Manassas27
- IT infrastructure and security companies in Pleasanton27
- IT infrastructure and security companies in Sterling27
- IT infrastructure and security companies in Fremont26
- IT infrastructure and security companies in Gaithersburg26
- IT infrastructure and security companies in Reno26
- IT infrastructure and security companies in Tulsa26
- IT infrastructure and security companies in Duluth25
- IT infrastructure and security companies in Marietta25
- IT infrastructure and security companies in Overland Park25
- IT infrastructure and security companies in Richardson25
- IT infrastructure and security companies in Sarasota25
- IT infrastructure and security companies in Virginia Beach25
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 IT infrastructure and security 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 IT infrastructure and security companies are there based in San Jose, United States?
RevenueBase identified 96 IT infrastructure and security 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 IT infrastructure and security companies?
New York leads the United States with 457 headquartered companies, followed by Houston (320) and Dallas (216). San Jose has 96.
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 2,587 verified decision-maker contacts tracked across these 96 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 27, 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.
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