Company lists · Data refreshed September 2026
Top 25 Information security companies based in Chicago, United States
RevenueBase identified 90 information security companies headquartered in Chicago, United States as of September 2026 and tracks 2,134 professional contacts across them, including 1,254 with verified work emails. New York is the largest hub.
This list covers information security companies 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 3, 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 information security companies based in Chicago, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 960 | ||||
“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 3, 2026Thanks. The Data Team will review it. | |||||
| 2 | 618 | ||||
“VikingCloud delivers battle-tested cybersecurity and compliance solutions that simply work.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 3 | EntaraPartial evidence | 68 | |||
“Experiencing a security incident?” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 4 | 57 | ||||
“Evolve Security is an offensive cybersecurity solution, delivering continuous penetration testing with the optimal blend of AI automation and human expertise, providing peace of…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 5 | 39 | ||||
“We help mid-sized organizations prevent costly business disruptions from cyberattacks.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 6 | 27 | ||||
“In today’s digitally connected world, cyber security plays a crucial role.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 7 | Ravenswood Technology GroupIndirect evidence | 21 | |||
“At Ravenswood Technology Group, we don’t just offer our customers cybersecurity solutions – we deliver value and expertise you can rely on as needs and risks change.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 8 | 10 | ||||
“Cyber threats are relentless, and security teams are overwhelmed.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 9 | 10 | ||||
“HCISS is an AI-Powered Cybersecurity company focused on helping organizations secure digital systems, sensitive data, and critical operations in an increasingly complex threat…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 10 | 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 3, 2026Thanks. The Data Team will review it. | |||||
| 11 | 8 | ||||
“Data Defenders is at the forefront of Managed Cybersecurity Operations Providers (MCOP), specializing in safeguarding municipalities through our exclusive Regional Security…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 12 | 7 | ||||
“JMA Consulting, LLC brings secure IT solutions to commercial clients in multiple industries nationwide.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 13 | 7 | ||||
“Amol Solutions strives to be a leader in cybersecurity services for organizations of all sizes.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 14 | Urbane SecurityStrong evidence | 6 | |||
“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 3, 2026Thanks. The Data Team will review it. | |||||
| 15 | 6 | ||||
“CrossRealms is a premier Cybersecurity and Managed Services provider with multiple locations in the United States, Canada, Europe, MENA region, and Asia.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 16 | 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 3, 2026Thanks. The Data Team will review it. | |||||
| 17 | 6 | ||||
“Not auditors but real hackers.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 18 | 5 | ||||
“Welcome to Network Aegis!” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 19 | Triforma TechPartial evidence | 5 | |||
“From server maintenance to disaster recovery, cloud solutions, IT network cyber security, asset management and more, TriForma Tech is in the business of making your business…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 20 | TeamwerksIndirect evidence | 5 | |||
“TeamWerks is an IT company based in the United States.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 21 | 4 | ||||
“Cybersecurity for small businesses.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 22 | 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 3, 2026Thanks. The Data Team will review it. | |||||
| 23 | 4 | ||||
“Apex IT and Cybersecurity Solutions Inc is a leading Technology and Cybersecurity services firm based in Chicago, IL.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 24 | 4 | ||||
“CyberMetis has collected some of the industry’s best minds and tools.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 25 | 4 | ||||
“Wolf Point Security is a cyber security consulting firm, plain and simple.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 90 information security companies based in Chicago, United States
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 1,254 reachable decision-makers.
Free signup · no credit card
Information security companies based in Chicago, United States at a glance
As of Sep 3, 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 90 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 information security companies, 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 “information security companies”. 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 information security companies, 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, 1,254 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 3, 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.
Information security companies by metro in the United States
- Information security companies in New York172
- Information security companies in Houston102
- Information security companies in Atlanta98
- Information security companies in Miami98
- Information security companies in Washington95
- Information security companies in Austin93
- Information security companies in Chicago90
- Information security companies in Dallas88
- Information security companies in San Francisco82
- Information security companies in Tampa74
- Information security companies in San Diego59
- Information security companies in Los Angeles57
- Information security companies in Arlington53
- Information security companies in Charlotte51
- Information security companies in Boston49
- Information security companies in Denver49
- Information security companies in Orlando48
- Information security companies in Columbia47
- Information security companies in San Antonio41
- Information security companies in Las Vegas40
- Information security companies in Phoenix37
- Information security companies in Seattle36
- Information security companies in Reston34
- Information security companies in Alexandria33
- Information security companies in Scottsdale32
- Information security companies in Baltimore29
- Information security companies in Fairfax29
- Information security companies in Raleigh29
- Information security companies in Sheridan29
- Information security companies in Huntsville28
- Information security companies in Mclean28
- Information security companies in Pittsburgh28
- Information security companies in San Jose28
- Information security companies in Wilmington28
- Information security companies in Ashburn25
- Information security companies in Columbus25
- Information security companies in Minneapolis25
Frequently asked
How many information security companies are there based in Chicago, United States?
RevenueBase identified 90 information security companies 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 information security companies?
New York leads with 172 headquartered companies, followed by Houston (102) and Atlanta (98).
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 1,254 verified decision-maker contacts tracked across these 90 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 3, 2026.
Ready to reach these companies? Verified emails and direct dials for all 90 information security companies based in Chicago, United States. Start with a free account, no credit card.
Get the full listRelated lists
Information security companies by geography
- Information security companies based in the United States
- Information security companies based in the United Kingdom
- Information security companies based in Brazil
- Information security companies based in Canada
- Information security companies based in France
- Information security companies based in Australia
- Information security companies based in Germany
- Information security companies based in Spain
- Information security companies based in the Netherlands
- Information security companies based in Italy
- Information security companies based in Mexico
- Information security companies based in South Africa
Browse the directory
Browse: Companies home · Information security companies in United States · All United States lists · All Information security companies lists · New lists
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Information security companies based in the United States
- Information security companies based in the United Kingdom
- Information security companies based in Brazil
- Information security companies based in Canada
- Information security companies based in France
- Information security companies based in Australia