Company lists · Data refreshed September 2026
Top 25 Security auditing firms based in Chicago, United States
RevenueBase identified 58 security auditing firms headquartered in Chicago, United States as of September 2026 and tracks 2,713 professional contacts across them, including 1,563 with verified work emails. New York is the largest hub.
This list covers security auditing firms headquartered in Chicago, 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 25 largest security auditing firms based in Chicago, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 947 | ||||
“Coalfire is the premier Cybersecurity and Compliance Services leader for the tech, healthcare, and finance industries.(This page is maintained by Marketing.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 2 | 874 | ||||
“Trustwave, a LevelBlue Company, is a globally recognized cybersecurity leader that reduces cyber risk and fortifies organizations against disruptive and damaging cyber threats.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 3 | 628 | ||||
“VikingCloud delivers battle-tested cybersecurity and compliance solutions that simply work.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 4 | 27 | ||||
“In today’s digitally connected world, cyber security plays a crucial role.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 5 | 10 | ||||
“Cyber threats are relentless, and security teams are overwhelmed.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 6 | 10 | ||||
“ArxNimbus brings visibility to every organization’s cybersecurity program, radically advancing how businesses understand and optimize for real resilience.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 7 | 9 | ||||
“Agrada Group provides clear and sustainable solutions to secure and grow your company.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 8 | 9 | ||||
“HTA Technology Security Consulting (HTA) is a certified Woman-Owned, Small, Disadvantaged, Minority business with offices in Chicago, IL, and the Washington DC corridor.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 9 | 7 | ||||
“At Cyber Bark, we bring 100 years of collective experience to the table, serving businesses across the US from our base in Illinois.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 10 | 7 | ||||
“Amol Solutions strives to be a leader in cybersecurity services for organizations of all sizes.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 11 | 6 | ||||
“Clairos is a cybersecurity company that helps organizations build stronger, more manageable security programs through a practical, tailored approach.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 12 | 6 | ||||
“Not auditors but real hackers.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 13 | 5 | ||||
“Welcome to Network Aegis!” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 14 | TeamwerksIndirect evidence | 5 | |||
“TeamWerks is an IT company based in the United States.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 15 | Urbane SecurityPartial evidence | 4 | |||
“Urbane Security is an information security firm that provides specially tailored security and compliance solutions that empower the Fortune 500 to securely focus on their ultimate…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 16 | Technoir Security SolutionsIndirect evidence | 4 | |||
“There's nothing like the peace of mind that comes from knowing someone has your back.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 17 | 4 | ||||
“Apex IT and Cybersecurity Solutions Inc is a leading Technology and Cybersecurity services firm based in Chicago, IL.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 18 | 4 | ||||
“CyberMetis has collected some of the industry’s best minds and tools.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 19 | 4 | ||||
“Wolf Point Security is a cyber security consulting firm, plain and simple.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 20 | Quantum VigilancePartial evidence | 3 | |||
“Quantum's Virtual Chief Information Security Officer (QvCISO) Services can help guide your company towards effective cybersecurity and compliance.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 21 | 2 | ||||
“B Suite Cyber Security is a leader in minimizing cyber breach risk and demonstrating compliance for the financial industry.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 22 | 1 | ||||
“The mission of Erus Consulting is to consistently deliver excellence in information security consulting and advisory services, endeavoring to be your preferred partner for all…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 23 | 1 | ||||
“Cyfenders is a cybersecurity advisory firm based in Chicago.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 24 | ForecheckIndirect evidence | 1 | |||
“Forecheck’s mission is to enable organizations of all sizes to supercharge their existing IT team and equip them with industry-leading, personalized cybersecurity knowledge and…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 25 | 1 | ||||
Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 58 security auditing firms based in Chicago, United States
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Security auditing firms based in Chicago, 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 Chicago, over 58 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 auditing 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 Chicago, United States whose own description of what they do matches “security auditing 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 auditing firms, and records with no verified work email. Companies headquartered outside Chicago 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, 1,563 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 auditing firms by metro in the United States
- Security auditing firms in New York86
- Security auditing firms in Atlanta77
- Security auditing firms in Austin67
- Security auditing firms in Houston66
- Security auditing firms in Tampa64
- Security auditing firms in Washington64
- Security auditing firms in Chicago58
- Security auditing firms in Dallas54
- Security auditing firms in Miami50
- Security auditing firms in San Francisco50
- Security auditing firms in Los Angeles43
- Security auditing firms in San Diego36
- Security auditing firms in Arlington33
- Security auditing firms in Charlotte32
- Security auditing firms in Seattle31
- Security auditing firms in Las Vegas27
- Security auditing firms in Columbia26
- Security auditing firms in Denver26
Frequently asked
How many security auditing firms are there based in Chicago, United States?
RevenueBase identified 58 security auditing firms headquartered in Chicago, 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?
Coalfire, headquartered in Chicago, tops this list with the largest team on record.
Which city has the most security auditing firms?
New York leads with 86 headquartered companies, followed by Atlanta (77) and Austin (67).
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 1,563 verified decision-maker contacts tracked across these 58 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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