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Company lists · Data refreshed September 2026

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

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 108 companies tracked

RevenueBase identified 108 legacy system modernization consultants headquartered in Chicago, United States as of September 2026 and tracks 4,610 professional contacts across them, including 2,652 with verified work emails. New York is the largest hub.

This list covers legacy system modernization consultants 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 20, 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 20, 2026 86% judged on-target in blind review
108Companies
4,610Contacts tracked
2,652Verified emails
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The 25 largest legacy system modernization consultants based in Chicago, United States

Ranked by team size
Top 25 of 108 legacy system modernization consultants based in Chicago, United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to legacy system modernization consultants: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1
AHEAD
Indirect evidenceChicago, IL, United StatesHQ checked Sep 20, 20261,001-5,0002,989 contacts →

Indirect evidence

“AHEAD accelerates strategy into execution by engineering integrated solutions across infrastructure, applications, data, and security.”

Source: RevenueBase Database · checked Sep 20, 2026
2
Beyond KEY
Indirect evidenceChicago, IL, United StatesHQ checked Sep 20, 2026201-500363 contacts →

Indirect evidence

“Our Journey of Growth, Trust, and Purpose Two decades ago, Beyond Key started with a vision not just to solve business problems with technology, but to create lasting impact.”

Source: RevenueBase Database · checked Sep 20, 2026
3
Q1 Technologies, INC
Indirect evidenceChicago, IL, United StatesHQ checked Sep 20, 20261,001-5,000262 contacts →

Indirect evidence

“Q1 Technologies is a global IT solutions and services provider focused on delivering innovative, scalable, and high-impact technology outcomes for enterprises worldwide.”

Source: RevenueBase Database · checked Sep 20, 2026
4
Krasan Consulting Services
Indirect evidenceChicago, IL, United StatesHQ checked Sep 20, 2026201-500172 contacts →

Indirect evidence

“Krasan Consulting Services is a Chicago-based boutique management consulting and technology solutions integrator.”

Source: RevenueBase Database · checked Sep 20, 2026
5
RKON
Indirect evidenceChicago, IL, United StatesHQ checked Sep 20, 202651-200163 contacts →

Indirect evidence

“Since 1998, RKON has delivered IT Transformation helping private equity and enterprise firms achieve Quiet IT from vision to execution.”

Source: RevenueBase Database · checked Sep 20, 2026
6
Bluerock
Indirect evidenceChicago, IL, United StatesHQ checked Sep 20, 2026201-50053 contacts →

Indirect evidence

“BlueROCK was founded on the premise that all companies should have a trusted partner for unbiased technology advice and guidance.”

Source: RevenueBase Database · checked Sep 20, 2026
7
Mars-Technominds, INC
Indirect evidenceChicago, IL, United StatesHQ checked Sep 20, 202651-20043 contacts →

Indirect evidence

“MARS-Technominds has indeed come a long way in setting high standards in technology and consulting services and has certainly proved to be a force to reckon with since its…”

Source: RevenueBase Database · checked Sep 20, 2026
8
Simetrica Consulting
Indirect evidenceChicago, IL, United StatesHQ checked Sep 20, 202651-20040 contacts →

Indirect evidence

“Simetrica Consulting is a computer software company based out of Ave.”

Source: RevenueBase Database · checked Sep 20, 2026
9
NPO USA INC
Indirect evidenceChicago, IL, United StatesHQ checked Sep 20, 202651-20037 contacts →

Indirect evidence

“We are NPO USA!”

Source: RevenueBase Database · checked Sep 20, 2026
10
US Software Professionals INC
Indirect evidenceChicago, IL, United StatesHQ checked Sep 20, 202611-5036 contacts →

Indirect evidence

“USSP (US Software Professionals Inc) is a best in class IT consulting firm offering end to end service and implementation solutions to clients worldwide.”

Source: RevenueBase Database · checked Sep 20, 2026
11
Quant16
Indirect evidenceChicago, IL, United StatesHQ checked Sep 20, 202651-20030 contacts →

Indirect evidence

“Quant16 is a Financial Performance Intelligence company.”

Source: RevenueBase Database · checked Sep 20, 2026
12
Vbridge Global LLC
Indirect evidenceChicago, IL, United StatesHQ checked Sep 20, 202611-5023 contacts →

Indirect evidence

“VBridgeGlobal LLC is a niche IT Services and Consulting organization in Illinois.”

Source: RevenueBase Database · checked Sep 20, 2026
13
Pearl Consulting Group
Indirect evidenceChicago, IL, United StatesHQ checked Sep 20, 202611-5022 contacts →

Indirect evidence

“Pearl Consulting Group is a global IT consulting firm dedicated to helping businesses navigate the complexities of technology with confidence.”

Source: RevenueBase Database · checked Sep 20, 2026
14
Zivra, LLC
Indirect evidenceChicago, IL, United StatesHQ checked Sep 20, 202611-5019 contacts →

Indirect evidence

“Zivra is a boutique IT professional services firm founded by highly-experienced IT consulting executives.”

Source: RevenueBase Database · checked Sep 20, 2026
15
Friendly Solutions Corp
Indirect evidenceChicago, IL, United StatesHQ checked Sep 20, 202611-5017 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 20, 2026
16
Mdrn Tech
Indirect evidenceChicago, IL, United StatesHQ checked Sep 20, 202611-5016 contacts →

Indirect evidence

“At MDRN Tech, we dare to dream big, push boundaries and deliver a more modern way.”

Source: RevenueBase Database · checked Sep 20, 2026
17
Next Dynamics
Indirect evidenceChicago, IL, United StatesHQ checked Sep 20, 202611-5013 contacts →

Indirect evidence

“Next Dynamics is a management consulting and technology solutions firm focused on helping organizations navigate and execute meaningful digital transformation.”

Source: RevenueBase Database · checked Sep 20, 2026
18
Amtech Analytics LLC
Indirect evidenceChicago, United StatesHQ checked Sep 20, 202651-2008 contacts →

Indirect evidence

“Amtech Analytics: Empowering Innovation through IT Consulting: Founded in 2023 by Kumarasenthil Muthuvel.”

Source: RevenueBase Database · checked Sep 20, 2026
19
Prime TSR
Strong evidenceChicago, IL, United StatesHQ checked Sep 20, 202651-2008 contacts →

Strong evidence

“Prime TSR is a technology modernization consultancy.”

Source: RevenueBase Database · checked Sep 20, 2026
20
Reintivity
Indirect evidenceChicago, IL, United StatesHQ checked Sep 20, 20261-108 contacts →

Indirect evidence

“Empowering your business through cutting-edge cloud and IT solutions, Reintivity Technology Solutions is your trusted partner in driving technological innovation and operational…”

Source: RevenueBase Database · checked Sep 20, 2026
21
RAO Solutions
Indirect evidenceChicago, IL, United StatesHQ checked Sep 20, 20261-108 contacts →

Indirect evidence

“RAO Solutions was formed to affect positive, qualitative and quantitative change within your organization.”

Source: RevenueBase Database · checked Sep 20, 2026
22
JMA Consulting LLC
Indirect evidenceChicago, IL, United StatesHQ checked Sep 20, 20261-107 contacts →

Indirect evidence

“JMA Consulting, LLC brings secure IT solutions to commercial clients in multiple industries nationwide.”

Source: RevenueBase Database · checked Sep 20, 2026
23
Digital Primates
Indirect evidenceChicago, IL, United StatesHQ checked Sep 20, 202611-506 contacts →

Indirect evidence

“Recognized as experts who work at the forefront of new technologies, Digital Primates brings a unique approach to our client engagements.”

Source: RevenueBase Database · checked Sep 20, 2026
24
Trinumstudio
Partial evidenceChicago, IL, United StatesHQ checked Sep 20, 20261-105 contacts →

Partial evidence

“TrinumStudio® is a leading digital transformation consultancy that empowers organizations to harness the power of technology to drive innovation, efficiency, and growth.”

Source: RevenueBase Database · checked Sep 20, 2026
25
Yayo Interactive
Partial evidenceChicago, IL, United StatesHQ checked Sep 20, 20261-105 contacts →

Partial 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 20, 2026

Showing 25 of 108 legacy system modernization consultants based in Chicago, United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 2,652 reachable decision-makers.

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

As of Sep 20, 2026
57.5%Verified-email coverage
42.7Average contacts per company
11-50Median size (employees)
163.0%Largest-city concentration · New York
Sep 20, 2026Page data refreshed

Companies by employee count

1-10
49
11-50
36
51-200
16
201-500
5
1,001-5,000
2

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 108 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 legacy system modernization consultants, 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 “legacy system modernization consultants”. 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 legacy system modernization consultants), 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 legacy system modernization consultants, 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, 2,652 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 20, 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.

Legacy system modernization consultants by metro in the United States

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 legacy system modernization consultants, 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 legacy system modernization consultants are there based in Chicago, United States?

RevenueBase identified 108 legacy system modernization consultants 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?

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

Which city has the most legacy system modernization consultants?

New York leads with 176 headquartered companies, followed by Houston (146) and Atlanta (122).

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 2,652 verified decision-maker contacts tracked across these 108 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 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 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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