Company lists · Data refreshed September 2026

Top 25 Enterprise IT infrastructure companies based in Chicago, United States

Name: Enterprise IT infrastructure companies based in Chicago, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 12, 2026 88 companies tracked

RevenueBase identified 88 enterprise IT infrastructure companies headquartered in Chicago, United States as of September 2026 and tracks 1,762 professional contacts across them, including 928 with verified work emails and 609 with mobile numbers. New York is the largest hub.

This list covers enterprise IT infrastructure 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 12, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 12, 2026 86% judged on-target in blind review

88Companies

1,762Contacts tracked

928Verified emails

609Mobile numbers

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The 25 largest enterprise IT infrastructure companies based in Chicago, United States

Ranked by team size

Top 25 of 88 enterprise IT infrastructure companies based in Chicago, United States, ranked by team size, largest first. Data refreshed Sep 12, 2026. RevenueBase Smart Search rates how each company's information relates to enterprise IT infrastructure companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Teceze	Strong evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	1,001-5,000	432 contacts →
	Strong evidence “Teceze is a global IT services company helping businesses modernise their technology infrastructure and drive measurable outcomes through Cloud, AI, Cybersecurity, Managed…” Source: RevenueBase Database · checked Sep 12, 2026
2	SDI Presence	Strong evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	201-500	391 contacts →
	Strong evidence “SDI Presence LLC is an IT consultancy and managed services provider (MSP) that leverages its strong team presence to advance our clients to a secure digital enterprise.” Source: RevenueBase Database · checked Sep 12, 2026
3	Avant Communications	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	51-200	263 contacts →
	Indirect evidence “As the nation’s premier distributor of next generation technologies, AVANT has the resources and relationships needed to successfully navigate the ever-changing world of…” Source: RevenueBase Database · checked Sep 12, 2026
4	Access ONE INC	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	51-200	140 contacts →
	Indirect evidence “Access One is a business technology services and communications provider, dedicated to world-class technologies and an award-winning client experience.” Source: RevenueBase Database · checked Sep 12, 2026
5	Crossrealms International	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	51-200	88 contacts →
	Indirect evidence “CrossRealms International is a Cybersecurity-First company operating across the United States, Europe, MENA region, and Asia.” Source: RevenueBase Database · checked Sep 12, 2026
6	DTI Diversified Technology INC	Partial evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	51-200	62 contacts →
	Partial evidence “DTI is a 100% African American-owned IT consulting and network services firm with nearly 40 years of experience.” Source: RevenueBase Database · checked Sep 12, 2026
7	NPO USA INC	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	51-200	37 contacts →
	Indirect evidence “We are NPO USA!” Source: RevenueBase Database · checked Sep 12, 2026
8	Black Diamond Solutions	Partial evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	11-50	21 contacts →
	Partial evidence “Black Diamond Solutions: Your Strategic IT Partner Since 2005, Black Diamond Solutions has been a trusted Value-Added Reseller focused on maximizing the ROI of your technology…” Source: RevenueBase Database · checked Sep 12, 2026
9	Micro-Tech USA	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	11-50	20 contacts →
	Indirect evidence “Welcome to Micro-Tech U.S.A!” Source: RevenueBase Database · checked Sep 12, 2026
10	Level-1 Global Solutions, LLC	Strong evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	11-50	17 contacts →
	Strong evidence “Level-1 Global Solutions is a certified M/DBE technology infrastructure firm that specializes in interoperable IT and mission-critical systems integration.” Source: RevenueBase Database · checked Sep 12, 2026
11	I.Q. Technologies, INC	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	11-50	17 contacts →
	Indirect evidence “Just like people, every business is unique in its own specific way.” Source: RevenueBase Database · checked Sep 12, 2026
12	CSC Consulting Group	Strong evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	11-50	17 contacts →
	Strong evidence “CSC Consulting Group (CSC) is an experienced IT services company offering a full range of IT services including high-level assessments, network infrastructure design and…” Source: RevenueBase Database · checked Sep 12, 2026
13	Deep Systems	Strong evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	11-50	15 contacts →
	Strong evidence “Deep Systems provides the financial industry with state-of-the-art strategically applied solutions for servicing software, infrastructure and managed IT.” Source: RevenueBase Database · checked Sep 12, 2026
14	Apotech Group	Partial evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	11-50	13 contacts →
	Partial evidence “We believe that Digital Transformation will continue to reshape the landscape in the global economy, driving the demand for digital infrastructure that will be more distributed…” Source: RevenueBase Database · checked Sep 12, 2026
15	IT Risk Managers LLC	Partial evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	11-50	13 contacts →
	Partial 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 12, 2026
16	Klio Systems, INC	Partial evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	1-10	9 contacts →
	Partial evidence “We are a IT Products & Services company headquartered in Chicago IL focused on managed IT & software engineering services.” Source: RevenueBase Database · checked Sep 12, 2026
17	Second City Power	Strong evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	11-50	8 contacts →
	Strong evidence “Second City Power provides a variety of products for Enterprise IT facilities.” Source: RevenueBase Database · checked Sep 12, 2026
18	Proxit, INC	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	1-10	6 contacts →
	Indirect evidence “Proxit, Inc is a full service business technology firm providing guidance and support for your information technology needs, today and in the future.” Source: RevenueBase Database · checked Sep 12, 2026
19	Terra Bridge Innovations In Technology	Partial evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	11-50	6 contacts →
	Partial evidence “INFRASTRUCTURE TO ARTWORK TerraBridge Innovations in Technology is the industry leading expert in special systems integration.” Source: RevenueBase Database · checked Sep 12, 2026
20	Triforma Tech	Partial evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	51-200	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 12, 2026
21	NE Digital, INC	Partial evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	11-50	5 contacts →
	Partial evidence “We are an IT-consultation powerhouse that designs and operates IT for Private Equity asset value creation.” Source: RevenueBase Database · checked Sep 12, 2026
22	Yayo Interactive	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	1-10	5 contacts →
	Indirect evidence “Yayo Interactive is a technology and digital solutions firm helping organizations modernize systems, strengthen security, and improve business performance through scalable…” Source: RevenueBase Database · checked Sep 12, 2026
23	Base Technology INC	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	1-10	5 contacts →
	Indirect evidence “BaseTech is built with one goal in mind, to bring honest and affordable technology solutions to our clients.” Source: RevenueBase Database · checked Sep 12, 2026
24	Technology Sourcing INC	Partial evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	11-50	4 contacts →
	Partial evidence “Technology Sourcing, Inc (TSI) is dedicated to delivering innovative technology solutions that create value and efficiencies within our clients infrastructures.” Source: RevenueBase Database · checked Sep 12, 2026
25	Zyvatech	Partial evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	1-10	4 contacts →
	Partial evidence “ZYVATECH™ (An ANNYZ Corporation Company) is an excellent IT soulutions providers, located in Vancouver and Chicago.” Source: RevenueBase Database · checked Sep 12, 2026

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: enterprise IT infrastructure companies. 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 enterprise IT infrastructure companies.
Partial evidence: Its own public description names part of enterprise IT infrastructure companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name enterprise IT infrastructure companies. 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 88 enterprise IT infrastructure companies based in Chicago, United States

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Enterprise IT infrastructure companies based in Chicago, United States at a glance

As of Sep 12, 2026

52.7%Verified-email coverage

34.6%Mobile-number coverage

20.0Average contacts per company

11-50Median size (employees)

263.6%Largest-city concentration · New York

Sep 12, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 14.0d

7780–30

13831–60

961–90

090–180

3180+

Company record updated

Median 62.0d

00–30

85531–60

63661–90

16490–180

107180+

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 enterprise IT infrastructure companies, 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 “enterprise IT infrastructure companies”. 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 enterprise IT infrastructure companies), 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 enterprise IT infrastructure 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 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, 928 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 12, 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.

Enterprise IT infrastructure companies by metro in the United States

Enterprise IT infrastructure companies in New York232
Enterprise IT infrastructure companies in Houston180
Enterprise IT infrastructure companies in Atlanta113
Enterprise IT infrastructure companies in Chicago108
Enterprise IT infrastructure companies in Miami103
Enterprise IT infrastructure companies in Dallas99
Enterprise IT infrastructure companies in Austin96

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 enterprise IT infrastructure companies, 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 enterprise IT infrastructure companies are there based in Chicago, United States?

RevenueBase identified 88 enterprise IT infrastructure 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?

Teceze, headquartered in Chicago, tops this list with the largest team on record.

Which city has the most enterprise IT infrastructure companies?

New York leads with 232 headquartered companies, followed by Houston (180) and Atlanta (113).

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 928 verified decision-maker contacts tracked across these 88 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 12, 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.