Company lists · Data refreshed September 2026
Top 11 Security audit firms based in Dallas, United States
RevenueBase identified 27 security audit firms headquartered in Dallas, United States as of September 2026 and tracks 244 professional contacts across them, including 105 with verified work emails. New York is the largest hub.
This list covers security audit firms headquartered in Dallas, 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 6, 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 11 largest security audit firms based in Dallas, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 64 | ||||
“Apollo Information Systems delivers intelligence-led cybersecurity solutions for government agencies, educational institutions, and enterprises.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 2 | 18 | ||||
“Founded in 2011, Clover IT is known as an innovative company, focused on Information Security and Compliance market.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 3 | 15 | ||||
“At Upstart Cyber, we bring the expertise gained from government and large-scale businesses to organizations of all sizes.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 4 | Progressive IT SolutionsIndirect evidence | 10 | |||
“We are like an “easy button” for your IT Department!” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 5 | 4 | ||||
“Birch Cline is a Dallas, Texas-based cybersecurity firm that specializes in protecting highly regulated environments and government agencies.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 6 | TekzysPartial evidence | 4 | |||
“Since 2012, TEKZYS has protected business infrastructure through security-first governance and disciplined technology oversight.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 7 | 3 | ||||
“With decades of combined experience in system and application architecture, Black Arc Security's team of veteran certified security experts can quickly evaluate and mitigate risks…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 8 | QuatronicsIndirect evidence | 2 | |||
“At Quatronics, we are more than just a cybersecurity consulting firm; we are your dedicated ally in safeguarding your digital assets and ensuring a resilient and secure business…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 9 | 2 | ||||
“Dallas-based firm delivering strategic cybersecurity solutions that close critical security gaps and enable business growth.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 10 | 2 | ||||
“SLVA’s expertise has been hard won in the trenches of banks and financial services, healthcare, telecommunications, retail, utilities, and government organizations.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 11 | 1 | ||||
“Cyberdors is a cybersecurity advisory and managed services firm helping organizations identify risks, build security strategies, and stay protected.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
Showing 11 of 27 security audit firms based in Dallas, United States
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Security audit firms based in Dallas, United States at a glance
As of Sep 6, 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 Dallas, over 27 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 security audit 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 Dallas, United States whose own description of what they do matches “security audit 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 security audit firms, and records with no verified work email. Companies headquartered outside Dallas 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, 105 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 6, 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.
Security audit firms by metro in the United States
- Security audit firms in New York52
- Security audit firms in Atlanta40
- Security audit firms in Houston38
- Security audit firms in Tampa38
- Security audit firms in San Francisco33
- Security audit firms in Austin32
- Security audit firms in Washington31
- Security audit firms in Chicago29
- Security audit firms in Dallas27
- Security audit firms in Miami25
- Security audit firms in San Diego25
Frequently asked
How many security audit firms are there based in Dallas, United States?
RevenueBase identified 27 security audit firms headquartered in Dallas, 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?
Apollo Information Systems, headquartered in Dallas, tops this list with the largest team on record.
Which city has the most security audit firms?
New York leads with 52 headquartered companies, followed by Atlanta (40) and Houston (38).
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 105 verified decision-maker contacts tracked across these 27 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 6, 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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