Company lists · Data refreshed September 2026

Top 25 Legacy system modernization companies based in Chicago, United States

Name: Legacy system modernization 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 20, 2026 102 companies tracked

RevenueBase identified 102 company matches for legacy system modernization companies associated with Chicago, United States as of September 2026 and tracks 6,888 professional contacts across them, including 3,429 with verified work emails. Across the United States, New York is the largest hub for this category (203 companies); Chicago has 102.

This list covers company matches for legacy system modernization companies associated with Chicago, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 20, 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 20, 2026 How this list was built

102Companies

6,888Contacts tracked

3,429Verified emails

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The 25 largest legacy system modernization companies based in Chicago, United States

Ranked by team size

Top 25 of 102 company matches for legacy system modernization companies based in Chicago, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 20, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	AHEAD	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	1,001-5,000	2,989 contacts →
	Exact match “AHEAD accelerates strategy into execution by engineering integrated solutions across infrastructure, applications, data, and security.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
2	Quinnox	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	1,001-5,000	1,917 contacts →
	Exact match “Everforth Quinnox is an AI-first Digital Always organization orchestrating value for forward-looking businesses.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
3	Q1 Technologies, INC	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	1,001-5,000	262 contacts →
	Exact match “Q1 Technologies is a global IT solutions and services provider focused on delivering innovative, scalable, and high-impact technology outcomes for enterprises worldwide.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
4	Maven Wave, An Eviden Company	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	501-1,000	184 contacts →
	Exact match “As of April 2023, Maven Wave is now part of Eviden, at Atos business.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
5	RKON	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	51-200	163 contacts →
	Exact match “Since 1998, RKON has delivered IT Transformation helping private equity and enterprise firms achieve Quiet IT from vision to execution.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
6	Dunn Solutions, A Kaartech Company	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	1,001-5,000	141 contacts →
	Exact match “Dunn Solutions is a digital commerce and business transformation consultancy focused on delivering velocity to our clients.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
7	Aberdeen Advisors LLC	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	51-200	85 contacts →
	Exact match “Headquartered in Chicago, with satellite offices in India and Mexico, Aberdeen Advisors LLC is a boutique digital consultancy providing innovative products and services.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
8	Adifice Technologies	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	51-200	59 contacts →
	Exact match “Adifice Technologies is an IT development, services and products firm.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
9	Logicon, LLC	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	51-200	56 contacts →
	Exact match “At Logicon, we help businesses streamline operations, reduce manual work, and make technology effortless.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
10	Triangu	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	11-50	45 contacts →
	Exact match “Triangu delivers end-to-end digital transformation for enterprises that need results, not just recommendations.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
11	NPO USA INC	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	51-200	37 contacts →
	Exact match “We are NPO USA!” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
12	Manifold	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	51-200	32 contacts →
	Exact match “Manifold is a dynamic consultancy and technology partner helping organizations across industries unlock innovation, drive digital transformation, and achieve sustainable growth.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
13	Revel Labs	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	11-50	31 contacts →
	Exact match “Revel Labs was founded from a legacy of leading Fortune 500 companies through technology fueled transformation, from ecommerce to cloud enablement to AI.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
14	Origin	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	11-50	28 contacts →
	Exact match “Origin is a new age consulting company born in the AI era that operates at the intersection of data analytics, AI and automation.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
15	Actminds, INC	Exact match	Chicago, United StatesHQ recorded Sep 20, 2026	501-1,000	25 contacts →
	Exact match “At Actminds we envision great outcomes in the partnership between our customers, employees, and alliances.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
16	Aptlylabs	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	11-50	24 contacts →
	Exact match “Empower your startup's vision by partnering with us to craft robust technology infrastructure tailored to your unique needs.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
17	Pearl Consulting Group	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	11-50	22 contacts →
	Exact match “Pearl Consulting Group is a global IT consulting firm dedicated to helping businesses navigate the complexities of technology with confidence.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
18	Zivra, LLC	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	11-50	19 contacts →
	Exact match “Zivra is a boutique IT professional services firm founded by highly-experienced IT consulting executives.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
19	Programmers US	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	201-500	17 contacts →
	Exact match “A proven software development partner, Programmers Inc.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
20	Mdrn Tech	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	11-50	16 contacts →
	Exact match “At MDRN Tech, we dare to dream big, push boundaries and deliver a more modern way.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
21	Next Dynamics	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	11-50	13 contacts →
	Exact match “Next Dynamics is a management consulting and technology solutions firm focused on helping organizations navigate and execute meaningful digital transformation.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
22	Davis Powers	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	11-50	11 contacts →
	Exact match “For over 20 years, Davis Powers has been a trusted technology solutions provider committed to making sure business owners have the most reliable and professional IT services.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
23	Spark Equation	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	11-50	11 contacts →
	Exact match “Spark Equation is a full-service software-enabled IT and strategy consulting firm operating at the intersection of strategy, product design, and engineering to optimize solutions…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
24	Amtech Analytics LLC	Exact match	Chicago, United StatesHQ recorded Sep 20, 2026	51-200	8 contacts →
	Exact match “Amtech Analytics: Empowering Innovation through IT Consulting: Founded in 2023 by Kumarasenthil Muthuvel.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
25	Prime TSR	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	51-200	8 contacts →
	Exact match “Prime TSR is a technology modernization consultancy.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “legacy system modernization companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 102 legacy system modernization companies based in Chicago, United States

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Legacy system modernization companies based in Chicago, United States at a glance

As of Sep 20, 2026

49.8%Verified-email coverage

67.5Average contacts per company

11-50Median size (employees)

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

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 102 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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: Company records associated with Chicago, United States whose business descriptions match “legacy system modernization companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 3,429 professional contacts with verified work emails across the full matched dataset. 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 20, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Legacy system modernization companies by metro in the United States

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “legacy system modernization companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many legacy system modernization companies are there based in Chicago, United States?

RevenueBase identified 102 company matches for legacy system modernization companies associated with Chicago, United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

AHEAD tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most legacy system modernization companies?

New York leads the United States with 203 company records, followed by Austin (148) and Houston (131). Chicago has 102.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 3,429 professional contacts with verified work emails tracked across these 102 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 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.