Company lists · Data refreshed September 2026

Top 25 Legacy system modernization consultancies based in Houston, United States

Name: Legacy system modernization consultancies based in Houston, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 73 companies tracked

RevenueBase identified 73 legacy system modernization consultancies headquartered in Houston, United States as of September 2026 and tracks 1,021 professional contacts across them, including 207 with verified work emails. Across the United States, New York is the largest hub for this category (84 companies); Houston follows with 73.

This list covers legacy system modernization consultancies headquartered in Houston, 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 28, 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 28, 2026 86% judged on-target in blind review

73Companies

1,021Contacts tracked

207Verified emails

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The 25 largest legacy system modernization consultancies based in Houston, United States

Ranked by team size

Top 25 of 73 legacy system modernization consultancies based in Houston, United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to legacy system modernization consultancies: 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	Sira Consulting, An INC 5000 Company	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	201-500	329 contacts →
	Indirect evidence “SiRA Consulting is a Certified MBE consulting company that was founded in 2012.” Source: RevenueBase Database · checked Sep 28, 2026
2	Qadworks	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	51-200	95 contacts →
	Indirect evidence “QADWorks is a Texas based IT consulting company founded in 2019.” Source: RevenueBase Database · checked Sep 28, 2026
3	Osscube	Partial evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	201-500	75 contacts →
	Partial evidence “Established in 2008, OSSCube, a division of Happiest Minds, is the digital transformation and modernization partner for global enterprise to fast growing start-ups, helping them…” Source: RevenueBase Database · checked Sep 28, 2026
4	3545 Consulting-Global	Partial evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	11-50	42 contacts →
	Partial evidence “3545 Consulting ™ specializes in implementing hardware, software, and service solutions for a variety of businesses, including law firms, legal entities, educational institutions…” Source: RevenueBase Database · checked Sep 28, 2026
5	Zirlen Technologies INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	11-50	31 contacts →
	Indirect evidence “About Zirlen Zirlen Technologies, Inc.” Source: RevenueBase Database · checked Sep 28, 2026
6	EPC Group.Net	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	201-500	30 contacts →
	Indirect evidence “EPC Group is a nationally recognized Microsoft consulting firm helping organizations modernize, migrate, secure, automate, and scale Microsoft cloud, AI, collaboration, and data…” Source: RevenueBase Database · checked Sep 28, 2026
7	Data Strategies Interchange, LLC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	11-50	28 contacts →
	Indirect evidence “Data Strategies Interchange is a leading provider of large-scale data migration and conversion services to Fortune 500 and Global companies that need to upgrade from older…” Source: RevenueBase Database · checked Sep 28, 2026
8	Qubryx	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	11-50	25 contacts →
	Indirect evidence “At Qubryx, we are a cloud-first, future-focused technology consulting firm that helps organizations accelerate their adoption of best-in-class software development and…” Source: RevenueBase Database · checked Sep 28, 2026
9	Rockit Consulting LLC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	11-50	20 contacts →
	Indirect evidence “We offer a range of IT consulting services all designed to help your company reach its potential.” Source: RevenueBase Database · checked Sep 28, 2026
10	Magnum Forge	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	11-50	20 contacts →
	Indirect evidence “Magnum Forge is now a part of Novus Consulting!” Source: RevenueBase Database · checked Sep 28, 2026
11	Silver BAY Consulting	Partial evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	11-50	20 contacts →
	Partial evidence “Our Mission is to Design, Implement and Support System solutions that increase Business productivity and profitability.” Source: RevenueBase Database · checked Sep 28, 2026
12	Lumiere Systems	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	501-1,000	19 contacts →
	Indirect evidence “With years of experience in helping businesses grow, we’ve mastered the skills of understanding business requirements irrespective of the industry they serve.” Source: RevenueBase Database · checked Sep 28, 2026
13	Celersoft Technology And Consulting Services	Indirect evidence	Houston, United StatesHQ checked Sep 28, 2026	11-50	16 contacts →
	Indirect evidence “Celersoft is leading the charge in IT innovation, revolutionizing businesses with state-of-the-art solutions and agile delivery methods.” Source: RevenueBase Database · checked Sep 28, 2026
14	Nepstaff	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	11-50	14 contacts →
	Indirect evidence “Nepstaff is IT Services & consulting provider.” Source: RevenueBase Database · checked Sep 28, 2026
15	Deljoosoft	Strong evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	11-50	10 contacts →
	Strong evidence “DeljooSoft helps government and mid-to-large organizations modernize legacy systems, integrate enterprise applications, and implement scalable digital platforms that improve…” Source: RevenueBase Database · checked Sep 28, 2026
16	Sembix	Strong evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	11-50	7 contacts →
	Strong evidence “Sembix is the end-to-end Modernization Intelligence platform that helps organizations fully understand the system they have, define the system they want, and automate the…” Source: RevenueBase Database · checked Sep 28, 2026
17	Bluecloud Technologies	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	11-50	6 contacts →
	Indirect evidence “BlueCloud Technologies is an adaptable, resourceful team that solves business problems through the practical application of the most appropriate information technology.” Source: RevenueBase Database · checked Sep 28, 2026
18	Mykrill	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	11-50	5 contacts →
	Indirect evidence “MyKrill is a strategic Digital & IT Solutions Partner focused on providing IT services, leadership, and triumphant outcomes for customers.” Source: RevenueBase Database · checked Sep 28, 2026
19	Technolync	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	1-10	4 contacts →
	Indirect evidence “Technolync, We provide IT consulting, services, and solutions for your business.” Source: RevenueBase Database · checked Sep 28, 2026
20	Cleveris Technologies	Partial evidence	Houston, United StatesHQ checked Sep 28, 2026	11-50	4 contacts →
	Partial evidence “Behind many successful organizations there are mature legacy applications at the core of vital business processes, and they are too valuable to be left behind.” Source: RevenueBase Database · checked Sep 28, 2026
21	Virtuoso Technologies INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	11-50	3 contacts →
	Indirect evidence “Virtuoso Technologies is a leading provider of IT services and IT consulting solutions for businesses of all sizes.” Source: RevenueBase Database · checked Sep 28, 2026
22	Intertech Consulting, INC	Partial evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	1-10	2 contacts →
	Partial evidence “Intertech Consulting focuses on the intersection of technology and business, a place where strategic consulting, project management, and information systems implementation…” Source: RevenueBase Database · checked Sep 28, 2026
23	Reliant Global Technology, INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	11-50	2 contacts →
	Indirect evidence “Reliant Global Technology focuses on simplifying business transformation.” Source: RevenueBase Database · checked Sep 28, 2026
24	A.R.E. Information Technology Systems	Partial evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	11-50	1 contacts →
	Partial evidence “Our team is made up of a group of highly skilled experts in strategic technology, business processes, and system implementation.” Source: RevenueBase Database · checked Sep 28, 2026
25	Yoppa Tech Solutions	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	1-10	1 contacts →
	Indirect evidence “Yoppa Inc is a full service IT consulting firm providing business services and solutions, helping customers command the powerful tools of Information Technology for a competitive…” Source: RevenueBase Database · checked Sep 28, 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: legacy system modernization consultancies. 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 legacy system modernization consultancies.
Partial evidence: Its own public description names part of legacy system modernization consultancies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name legacy system modernization consultancies. 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 73 legacy system modernization consultancies based in Houston, United States

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Legacy system modernization consultancies based in Houston, United States at a glance

As of Sep 28, 2026

20.3%Verified-email coverage

14.0Average contacts per company

11-50Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Email recency for this list is measured across the whole United States list rather than for Houston, so it is reported there. Company counts and contact totals on this page are exact for Houston, over 73 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 consultancies, 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 Houston, United States whose own description of what they do matches “legacy system modernization consultancies”. 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 consultancies), 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 consultancies, and records with no verified work email. Companies headquartered outside Houston 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, 207 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 28, 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 consultancies 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 consultancies, 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 consultancies are there based in Houston, United States?

RevenueBase identified 73 legacy system modernization consultancies headquartered in Houston, 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?

Sira Consulting, An INC 5000 Company, headquartered in Houston, tops this list with the largest team on record.

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

New York leads the United States with 84 headquartered companies, followed by Houston (73) and Austin (60).

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 207 verified decision-maker contacts tracked across these 73 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 28, 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.