Company lists · Data refreshed September 2026
Top 25 IT security consulting firms based in San Diego, United States
RevenueBase identified 77 IT security consulting firms headquartered in San Diego, United States as of September 2026 and tracks 541 professional contacts across them, including 230 with verified work emails. New York is the largest hub.
This list covers IT security consulting firms headquartered in San Diego, 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, how directly it supports the match, and when it was last checked. Data refreshed September 4, 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.
The 25 largest IT security consulting firms based in San Diego, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | NTH Generation ComputingStrong evidence | 88 | |||
“Since 1991, Nth Generation has provided industry leading, consultative IT services, encompassing a suite of IT and security solutions.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 2 | 56 | ||||
“Your organization requires IT to help it drive innovation, profitability, and security.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 3 | Templar ShieldPartial evidence | 47 | |||
“Templar Shield is a specialized risk, security, identity and AI governance advisory firm helping organizations operate with confidence in an increasingly automated, AI-driven…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 4 | 38 | ||||
“Our Mission To empower organizations with secure, compliant, and modern IT solutions that reduce risk, accelerate growth, and enable lasting innovation.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 5 | X-FedsIndirect evidence | 38 | |||
“X-Feds is a Small Business headquartered in San Diego, CA with satellite offices located in Norfolk, Virginia; Charleston, South Carolina; Crane, Indiana and Washington, DC.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 6 | TrustthinkIndirect evidence | 23 | |||
“Founded in 2018, TrustThink provides cybersecurity engineering and system-of-systems assurance for complex, connected products and platforms.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 7 | 20 | ||||
“Founded in 2003, Conde Group, Inc.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 8 | TaranetPartial evidence | 14 | |||
“Cyber Security Risk Management Taranet provides SME support to identify, mitigate, and manage cyber security risks.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 9 | TbdcyberIndirect evidence | 9 | |||
“TBDCyber is a cybersecurity company focused on strategy, assessments, and program build services.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 10 | ScalesecIndirect evidence | 9 | |||
“Now owned by RKON.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 11 | 9 | ||||
“Brier & Thorn helps organizations build value by taking a critical thinking approach to managing IT risk.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 12 | NexifyPartial evidence | 7 | |||
“Our Vision Nexify helps clients achieve operational efficiency, data security, and strategic tech integration, focusing on Artificial Intelligence, Data Governance, and…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 13 | 6 | ||||
“At Dispatch Tech, we're dedicated to securing your digital world.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 14 | 6 | ||||
“HannulaWells is a cyber security services provider, servicing enterprise level environments to SMB's.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 15 | 5 | ||||
Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 16 | SAN Diego IT ProsStrong evidence | 3 | |||
“IT Consulting firm based in San Diego, offering consulting on security, network management, infrastructure, cloud services, and more.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 17 | Somerset Recon, INCIndirect evidence | 3 | |||
Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 18 | Nextwave Solutions, INCStrong evidence | 3 | |||
“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.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 19 | The Kika CompanyStrong evidence | 3 | |||
“We are a valued added reseller for Security consulting Company that provides consulting services to Software, IT, Cyber Security, Information Security, DoD, Retail, Manufacturing…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 20 | SystackitPartial evidence | 3 | |||
“SystackIT provides network, cloud based, and end-user security and training.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 21 | 3 | ||||
“Founded in 2013 on the IDEA to provide Basic Foundational IT Solutions and Support with an Excellent Customer Experience.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 22 | Prometheus CybersecurityPartial evidence | 2 | |||
“Prometheus Cybersecurity is an information security company based out of San Diego, California.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 23 | 2 | ||||
“Cyclic Security Solutions (CS2) is a leading provider of Cyber Security Engineering, Program Management and Systems Integration by providing technical services and solutions.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 24 | 2 | ||||
“Executive Advisors Group, LLC helps organizations address security, privacy, risk, and other governance issues in a manner that is both pragmatic and effective.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 25 | Taro Technology LLCStrong evidence | 2 | |||
“Providing IT / security and consulting services to medium sized business” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 77 IT security consulting firms based in San Diego, United States
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IT security consulting firms based in San Diego, United States at a glance
As of Sep 4, 2026Companies by employee count
Email recency for this list is measured across the whole United States list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for San Diego, over 77 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 security consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in San Diego, United States whose own description of what they do matches “IT security consulting firms”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among IT security consulting firms, and records with no verified work email. Companies headquartered outside San Diego 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 an evidence 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, 230 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 4, 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 security consulting firms by metro in the United States
- IT security consulting firms in New York239
- IT security consulting firms in Houston148
- IT security consulting firms in Atlanta139
- IT security consulting firms in Washington138
- IT security consulting firms in Dallas119
- IT security consulting firms in Austin117
- IT security consulting firms in Miami114
- IT security consulting firms in Chicago113
- IT security consulting firms in Tampa95
- IT security consulting firms in San Francisco93
- IT security consulting firms in Los Angeles84
- IT security consulting firms in San Diego77
- IT security consulting firms in Boston69
- IT security consulting firms in Charlotte69
- IT security consulting firms in Denver68
- IT security consulting firms in Arlington64
- IT security consulting firms in Seattle64
- IT security consulting firms in San Antonio59
- IT security consulting firms in Phoenix57
- IT security consulting firms in Orlando54
- IT security consulting firms in Reston51
- IT security consulting firms in Alexandria50
- IT security consulting firms in Columbia47
- IT security consulting firms in Las Vegas45
- IT security consulting firms in Raleigh45
- IT security consulting firms in Ashburn42
- IT security consulting firms in Columbus38
- IT security consulting firms in Fairfax37
- IT security consulting firms in Mclean37
- IT security consulting firms in Portland37
- IT security consulting firms in Scottsdale37
- IT security consulting firms in Baltimore35
- IT security consulting firms in Nashville35
- IT security consulting firms in Richmond35
- IT security consulting firms in Huntsville34
- IT security consulting firms in Minneapolis34
- IT security consulting firms in San Jose34
- IT security consulting firms in Plano32
- IT security consulting firms in Pittsburgh31
- IT security consulting firms in Herndon30
- IT security consulting firms in Sheridan30
- IT security consulting firms in Philadelphia29
- IT security consulting firms in Wilmington28
- IT security consulting firms in Frisco26
- IT security consulting firms in Indianapolis26
- IT security consulting firms in Sacramento26
Frequently asked
How many IT security consulting firms are there based in San Diego, United States?
RevenueBase identified 77 IT security consulting firms headquartered in San Diego, 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?
NTH Generation Computing, headquartered in San Diego, tops this list with the largest team on record.
Which city has the most IT security consulting firms?
New York leads with 239 headquartered companies, followed by Houston (148) and Atlanta (139).
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 230 verified decision-maker contacts tracked across these 77 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 4, 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.
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