Company lists · Data refreshed September 2026
Top 25 IT support firms based in Chicago, United States
RevenueBase identified 98 IT support firms headquartered in Chicago, United States as of September 2026 and tracks 427 professional contacts across them, including 112 with verified work emails. New York is the largest hub.
This list covers IT support 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 21, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 support firms based in Chicago, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 58 contacts → | ||||
Indirect evidence “As of September 2018, YJT Solutions has rebranded and is now known as entara!” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 32 contacts → | ||||
Indirect evidence “At SMaRT Technology Services, our resources are dedicated to helping businesses, schools and governmental agencies by making sure their organization's technology is highly…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 17 contacts → | ||||
Indirect evidence “We are an information technology consulting firm, dedicated to providing comprehensive technology solutions for specific business needs.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 15 contacts → | ||||
Partial evidence “CTS is your Technology Management Partner when it comes to managing all the computing needs of your business!” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 13 contacts → | ||||
Strong evidence “IT Risk Managers LLC provides proactive Chicago IT support to insure systems are available and ready to meet the needs of today's businesses 24/7.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 6 | 12 contacts → | ||||
Partial evidence “Since its founding in The MIS Department has provided enterprise class support and service to small and medium-sized businesses in the U.S.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 10 contacts → | ||||
Partial evidence “INTELLIGENTLY TAILORED IT.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 10 contacts → | ||||
Strong evidence “FireLogic is your complete Managed IT Services provider that specializes in technology support, consulting, training, and deployment for commercial, nonprofit, and education…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 9 | 10 contacts → | ||||
Partial evidence “We want to be your IT Department!” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 9 contacts → | ||||
Indirect evidence “Birds on a Cable is a Chicago based Information Technology company.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 7 contacts → | ||||
Partial evidence “vitaltech is Chicago’s leading provider of outsourced IT services, dedicated to delivering a genuine, human IT experience through a high-energy approach and adaptable products and…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 7 contacts → | ||||
Strong evidence “Seraph Technology Solutions is a Chicago-based IT firm that focuses on help desk-related support (from data backups to outsourcing), website design, and VoIP implementations.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 13 | 5 contacts → | ||||
Partial evidence “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: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 5 contacts → | ||||
Indirect evidence “Slow computers, clunky systems, and unexpected downtime aren’t just frustrating-they hold your team back and drain productivity.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 5 contacts → | ||||
Indirect evidence “Everything in your business depends upon technology.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 16 | 4 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 17 | 4 contacts → | ||||
Indirect evidence “WorkSite LLC provides Computer Consulting to Chicago's small businesses and home owners.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 18 | 4 contacts → | ||||
Indirect evidence “NerdsToGo® has been providing computer repairs and technology-based services to both small businesses and homes since our founding in 2003.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 3 contacts → | ||||
Strong evidence “Hudson Sky offers a full range of Managed IT Services and IT Consulting support for businesses across the United States.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 20 | 3 contacts → | ||||
Partial evidence “ST & M, LLC is a full-service technology consulting firm targeting small to midsize companies lacking the budget for full-time IT departments and staff.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 21 | 3 contacts → | ||||
Strong evidence “Advanced Network Consulting Solutions (ANCS) is an IT consulting company that specializes in comprehensive technological solutions and support services.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 22 | 3 contacts → | ||||
Partial evidence “IT Services for small businesses, law firms, non-profits, and schools.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 3 contacts → | ||||
Indirect evidence “For over 16 years we've been helping small business and small law firms in Chicago with their computer systems.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 2 contacts → | ||||
Partial evidence “Root Port IT Solutions is a small, agile and dedicated IT consulting company based in Chicago, IL.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 2 contacts → | ||||
Indirect evidence “The Best I.T.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: IT support firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names IT support firms.
- Partial evidence
- Its own public description names part of IT support firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name IT support firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 98 IT support firms based in Chicago, United States
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IT support firms based in Chicago, United States at a glance
As of Sep 21, 2026Companies by employee count
Email recency for this list is measured across the whole United States list rather than for Chicago, so it is reported there. Company counts and contact totals on this page are exact for Chicago, over 98 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 support firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search 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 Smart Search, 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 “IT support firms”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names IT support firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among IT support 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 its RevenueBase Smart Search 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, 112 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 21, 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 support firms by metro in the United States
- IT support firms in New York204
- IT support firms in Houston133
- IT support firms in Chicago98
- IT support firms in Miami91
- IT support firms in Los Angeles84
- IT support firms in San Diego76
- IT support firms in Atlanta75
- IT support firms in Austin73
- IT support firms in Dallas70
- IT support firms in Phoenix60
- IT support firms in Denver57
- IT support firms in Las Vegas57
- IT support firms in Seattle55
- IT support firms in Tampa55
- IT support firms in San Francisco52
- IT support firms in Orlando44
- IT support firms in Irvine42
- IT support firms in Charlotte41
- IT support firms in Portland41
- IT support firms in San Antonio40
- IT support firms in Columbus38
- IT support firms in Jacksonville35
- IT support firms in Indianapolis34
- IT support firms in Pittsburgh32
- IT support firms in Raleigh32
- IT support firms in Philadelphia30
- IT support firms in Richmond30
- IT support firms in San Jose30
- IT support firms in Tulsa30
- IT support firms in Colorado Springs29
- IT support firms in West Palm Beach29
- IT support firms in Springfield28
- IT support firms in Wilmington28
- IT support firms in Cincinnati27
- IT support firms in Troy27
- IT support firms in Boston26
- IT support firms in Cleveland26
- IT support firms in Greenville26
- IT support firms in Sacramento26
- IT support firms in Washington26
- IT support firms in Tucson25
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names IT support firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many IT support firms are there based in Chicago, United States?
RevenueBase identified 98 IT support 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?
YJT Solutions, headquartered in Chicago, tops this list with the largest team on record.
Which city has the most IT support firms?
New York leads with 204 headquartered companies, followed by Houston (133) and Chicago (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 112 verified decision-maker contacts tracked across these 98 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 21, 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 Smart Search, 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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