Company lists · Data refreshed October 2026

Top 22 Information security companies based in San Diego, United States

RevenueBase identified 55 company matches for information security companies associated with San Diego, United States as of October 2026 and tracks 366 professional contacts across them, including 136 with verified work emails. Across the United States, New York is the largest hub for this category (178 companies); San Diego has 55.

This list covers company matches for information security companies associated with San Diego, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 1, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Oct 1, 2026 How this list was built
55Companies
366Contacts tracked
136Verified emails
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The 22 largest information security companies based in San Diego, United States

Ranked by team size
Top 22 of 55 company matches for information security companies based in San Diego, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 1, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchSan Diego, CA, United StatesHQ recorded Oct 1, 202651-20089 contacts →

Exact match

“Since 1991, Nth Generation has provided industry leading, consultative IT services, encompassing a suite of IT and security solutions.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
2Exact matchSan Diego, CA, United StatesHQ recorded Oct 1, 202611-5046 contacts →

Exact match

“Providing the Most Innovative and Intelligent Defense Available With the growth and evolution of cyber threats, cybersecurity has been thrust into the forefront of modern…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
3Exact matchSan Diego, CA, United StatesHQ recorded Oct 1, 202611-5022 contacts →

Exact match

“We are now serving IT needs in the greater Chicago area!”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
4Exact matchSan Diego, CA, United StatesHQ recorded Oct 1, 20261-1014 contacts →

Exact match

“Cyber Security Risk Management Taranet provides SME support to identify, mitigate, and manage cyber security risks.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
5Exact matchSan Diego, CA, United StatesHQ recorded Oct 1, 202611-5010 contacts →

Exact match

“There is more cyber threat intelligence available today than ever before, but the challenge is knowing what is actionable and having the tools to act on it.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
6Exact matchSan Diego, CA, United StatesHQ recorded Oct 1, 202611-509 contacts →

Exact match

“TBDCyber is a cybersecurity company focused on strategy, assessments, and program build services.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
7Exact matchSan Diego, CA, United StatesHQ recorded Oct 1, 202611-506 contacts →

Exact match

“At Dispatch Tech, we're dedicated to securing your digital world.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
8Exact matchSan Diego, CA, United StatesHQ recorded Oct 1, 20261-106 contacts →

Exact match

“HannulaWells is a cyber security services provider, servicing enterprise level environments to SMB's.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
9Exact matchSan Diego, CA, United StatesHQ recorded Oct 1, 202611-506 contacts →

Exact match

“Our Vision Nexify helps clients achieve operational efficiency, data security, and strategic tech integration, focusing on Artificial Intelligence, Data Governance, and…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
10Exact matchSan Diego, CA, United StatesHQ recorded Oct 1, 202651-2005 contacts →

Exact match

“DB CyberTech innovates predictive data loss prevention for structured data.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
11Exact matchSan Diego, CA, United StatesHQ recorded Oct 1, 20261-105 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
12Exact matchSan Diego, CA, United StatesHQ recorded Oct 1, 20261-103 contacts →

Exact match

“IT SECURITY ASSESSMENTS One of our goals is to empower businesses defend their critical data and sensitive information assets from the threat of cyber attacks.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
13Exact matchSan Diego, CA, United StatesHQ recorded Oct 1, 20261-103 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
14Exact matchSan Diego, CA, United StatesHQ recorded Oct 1, 20261-103 contacts →

Exact match

“SystackIT provides network, cloud based, and end-user security and training.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
15Exact matchSan Diego, United StatesHQ recorded Oct 1, 20261-103 contacts →

Exact match

“Founded in 2013 on the IDEA to provide Basic Foundational IT Solutions and Support with an Excellent Customer Experience.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
16Exact matchSan Diego, CA, United StatesHQ recorded Oct 1, 2026201-5002 contacts →

Exact match

“Business Overview - Computing is not about computers anymore.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
17Exact matchSan Diego, CA, United StatesHQ recorded Oct 1, 202611-502 contacts →

Exact match

“We make cyber risk manageable by monitoring network traffic from the perimeter to the core, analyzing data in motion, visualizing risk and alerting to potential threats.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
18Exact matchSan Diego, CA, United StatesHQ recorded Oct 1, 20261-102 contacts →

Exact match

“Prometheus Cybersecurity is an information security company based out of San Diego, California.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
19Exact matchSan Diego, CA, United StatesHQ recorded Oct 1, 20261-102 contacts →

Exact match

“Providing IT / security and consulting services to medium sized business”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
20Exact matchSan Diego, CA, United StatesHQ recorded Oct 1, 20261-102 contacts →

Exact match

“Atlant Security engineers the cybersecurity posture that enterprise procurement teams approve on sight.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
21Exact matchSan Diego, CA, United StatesHQ recorded Oct 1, 20261-101 contacts →

Exact match

“Providing managed IT services with an emphasis on cybersecurity.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
22Exact matchSan Diego, CA, United StatesHQ recorded Oct 1, 20261-101 contacts →

Exact match

“Our firm specializes in Data Privacy, Cybersecurity & Network Consulting Services.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase

Showing 22 of 55 information security companies based in San Diego, United States

See the full list, filter by size, metro and specialty, and access 136 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Information security companies based in San Diego, United States at a glance

As of Oct 1, 2026
37.2%Verified-email coverage
6.7Average contacts per company
1-10Median size (employees)
Oct 1, 2026Page data refreshed

Companies by employee count

1-10
39
11-50
12
51-200
3
201-500
1

Email recency for this list is measured across the whole United States list rather than for San Diego, so it is reported there. Company counts and contact totals on this page are exact for San Diego, over 55 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with San Diego, United States whose business descriptions match “information security companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 136 professional contacts with verified work emails across the full matched dataset. 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 October 1, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Information security companies by metro in the United States

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “information security companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many information security companies are there based in San Diego, United States?

RevenueBase identified 55 company matches for information security companies associated with San Diego, United States as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

NTH Generation Computing tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most information security companies?

New York leads the United States with 178 company records, followed by Atlanta (103) and Austin (100). San Diego has 55.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 136 professional contacts with verified work emails tracked across these 55 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 1, 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 SmartSearch, 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.