Company lists · Data refreshed September 2026

Top 25 Legacy system modernization consultancies based in Mexico

Name: Legacy system modernization consultancies based in Mexico
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 169 companies tracked

RevenueBase identified 169 legacy system modernization consultancies headquartered in Mexico as of September 2026 and tracks 1,884 professional contacts across them, including 352 with verified work emails. Ciudad De Mexico is the largest hub.

This list covers legacy system modernization consultancies headquartered in Mexico, 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

169Companies

1,884Contacts tracked

352Verified emails

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The 25 largest legacy system modernization consultancies based in Mexico

Ranked by team size

Top 25 of 169 legacy system modernization consultancies based in Mexico, 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	GCG	Indirect evidence	Miguel Hidalgo, MexicoHQ checked Sep 28, 2026	51-200	195 contacts →
	Indirect evidence “El éxito de GCG se debe a dos elementos clave: nuestra gente y nuestra calidad de servicio.” Source: RevenueBase Database · checked Sep 28, 2026
2	BADAK	Indirect evidence	Mexico City, MexicoHQ checked Sep 28, 2026	51-200	130 contacts →
	Indirect evidence “Somos una consultoría de software enfocada en ayudar a nuestros clientes a transformar sus negocios a través del uso y adopción de tecnologías que les permitan no sólo automatizar…” Source: RevenueBase Database · checked Sep 28, 2026
3	MCS Networks	Indirect evidence	Monterrey, MexicoHQ checked Sep 28, 2026	201-500	129 contacts →
	Indirect evidence “We are a group of qualified and experienced professionals who combine our talents to solve problems through technology.” Source: RevenueBase Database · checked Sep 28, 2026
4	CIISA	Indirect evidence	San Pedro Garza Garcia, MexicoHQ checked Sep 28, 2026	51-200	122 contacts →
	Indirect evidence “Somos un equipo de profesionales que entendemos y nos hacemos parte de las necesidades que las empresas día a día están requiriendo en su lucha por ser las más competitivas y…” Source: RevenueBase Database · checked Sep 28, 2026
5	Movit Group	Indirect evidence	Valle Oriente, MexicoHQ checked Sep 28, 2026	201-500	101 contacts →
	Indirect evidence “Desde 2014, Movit Group es una consultoría especializada en sistemas de información, con presencia en mercados de alto dinamismo y un modelo de trabajo diseñado para generar valor…” Source: RevenueBase Database · checked Sep 28, 2026
6	Círculo Daat	Indirect evidence	Alcaldía Cuauhtémoc, MexicoHQ checked Sep 28, 2026	51-200	63 contacts →
	Indirect evidence “Somos un equipo de consultoría, proyectos y servicios, que establece relaciones de largo plazo con sus clientes y proveedores, agregando valor a sus negocios, procesos y flujos de…” Source: RevenueBase Database · checked Sep 28, 2026
7	Estrategia Tecnológica	Indirect evidence	Ciudad De México, MexicoHQ checked Sep 28, 2026	51-200	56 contacts →
	Indirect evidence “Estrategia Tecnológica helps organizations execute critical technology initiatives with clarity, control, and measurable results.” Source: RevenueBase Database · checked Sep 28, 2026
8	Alianza Corp	Indirect evidence	MexicoHQ checked Sep 28, 2026	51-200	53 contacts →
	Indirect evidence “We collaborate in your company's IT strategy to enhance the quality of your processes and your services.” Source: RevenueBase Database · checked Sep 28, 2026
9	Ghimprove	Indirect evidence	Cdmx, MexicoHQ checked Sep 28, 2026	51-200	38 contacts →
	Indirect evidence “An IT project implementation could be a long & exhausting path and with uncertain results if the IT solution is not implemented in a responsible and correct way.” Source: RevenueBase Database · checked Sep 28, 2026
10	Trend-It	Indirect evidence	Federal District, MexicoHQ checked Sep 28, 2026	11-50	30 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
11	ATDAC	Indirect evidence	Cuauhtémoc, MexicoHQ checked Sep 28, 2026	11-50	28 contacts →
	Indirect evidence “A través de nuestros casi diez años de permanencia en el mercado, hemos sumado a nuestras filas las tecnologías más disruptivas, así como los recursos con mayor experiencia…” Source: RevenueBase Database · checked Sep 28, 2026
12	Itnnovation	Indirect evidence	Torreón, MexicoHQ checked Sep 28, 2026	11-50	28 contacts →
	Indirect evidence “At Itnnovation, we understand the necessities of your company, and we offer effective solutions that address those needs.” Source: RevenueBase Database · checked Sep 28, 2026
13	Biaani Consultancy Services	Indirect evidence	México Df, MexicoHQ checked Sep 28, 2026	11-50	25 contacts →
	Indirect evidence “Biaani Consultancy Services es una empresa de consultoría, desarrollo, e integración de sistemas, joven por su gente y grande por su experiencia.” Source: RevenueBase Database · checked Sep 28, 2026
14	Sitméxico	Indirect evidence	México D.f., MexicoHQ checked Sep 28, 2026	51-200	25 contacts →
	Indirect evidence “Nuestras soluciones están enfocadas a resolver las necesidades específicas para tu compañía y ofrecemos soluciones tecnológicas a la medida, mediante una consultoría e…” Source: RevenueBase Database · checked Sep 28, 2026
15	Ceico ITT	Indirect evidence	Guadalajara, MexicoHQ checked Sep 28, 2026	11-50	18 contacts →
	Indirect evidence “En Ceico creemos en un futuro donde las empresas medianas y grandes operen con total confianza tecnológica: sin miedo a brechas de seguridad, sin infraestructura que las limite, y…” Source: RevenueBase Database · checked Sep 28, 2026
16	Consejeros Profesionales EN Sistemas S.A. DE C.V. Copsis	Indirect evidence	Monterrey, MexicoHQ checked Sep 28, 2026	11-50	17 contacts →
	Indirect evidence “Tecnología Nuestra plataforma de desarrollo permite integrar tecnologías de última generación, por lo que hemos logrado llevar nuestras soluciones mas allá de solo una consulta…” Source: RevenueBase Database · checked Sep 28, 2026
17	Hallmg Consulting, S.A	Indirect evidence	Zapopan, MexicoHQ checked Sep 28, 2026	11-50	15 contacts →
	Indirect evidence “Consultoria en Computacion para su empresa, ayudamos a implantar sistemas y a lograr proyectos exitosos de tecnologias de informacion, que logren claros retornos de inversion.” Source: RevenueBase Database · checked Sep 28, 2026
18	Nemaris	Indirect evidence	Cdmx, MexicoHQ checked Sep 28, 2026	11-50	13 contacts →
	Indirect evidence “At Nemaris we are experts in specialized consulting services and solutions.” Source: RevenueBase Database · checked Sep 28, 2026
19	6delta Consultores	Indirect evidence	Roma Sur, MexicoHQ checked Sep 28, 2026	51-200	13 contacts →
	Indirect evidence “6Delta es una Empresa de Consultoría con más de 10 años de experiencia; especializada en transformación de negocios, arquitectura empresarial, optimización y gobierno de procesos…” Source: RevenueBase Database · checked Sep 28, 2026
20	Sysviewsoft	Indirect evidence	Ciudad De Mexico, MexicoHQ checked Sep 28, 2026	11-50	11 contacts →
	Indirect evidence “Consultoría especializada en proyectos de migración y modernización de aplicaciones entre plataformas Mainframe y abiertas (Unix-Linux).” Source: RevenueBase Database · checked Sep 28, 2026
21	Tecnoimplanta	Indirect evidence	\|\| Benito Juárez, MexicoHQ checked Sep 28, 2026	51-200	10 contacts →
	Indirect evidence “Your ideal strategic partner to implement business strategies with state of the art information technology web and mobile by agile solutions, faster than ever, high ROI and…” Source: RevenueBase Database · checked Sep 28, 2026
22	Recursos Humanos Plan B Consultoría DE Sistemas	Indirect evidence	Monterrey, MexicoHQ checked Sep 28, 2026	11-50	10 contacts →
	Indirect evidence “Tenemos un valor excepcional con servicios de arquitectura, consultoría, desarrollo e implementación de sistemas de información, expertos locales del sector, soluciones y la…” Source: RevenueBase Database · checked Sep 28, 2026
23	Go4it	Indirect evidence	Álvaro Obregón, MexicoHQ checked Sep 28, 2026	11-50	10 contacts →
	Indirect evidence “Digital Transformation at a glance!” Source: RevenueBase Database · checked Sep 28, 2026
24	Dbasys13	Indirect evidence	Col Del Valle Centro, MexicoHQ checked Sep 28, 2026	11-50	10 contacts →
	Indirect evidence “Brindamos soluciones de alta calidad buscando la eficiencia en la operación y funcionamiento tecnológico a través del diseño, implementación, administración, asesoría y soporte de…” Source: RevenueBase Database · checked Sep 28, 2026
25	Contein SA DE CV	Indirect evidence	Monterrey, MexicoHQ checked Sep 28, 2026	11-50	9 contacts →
	Indirect evidence “Consultoria en tecnologia en Información.” 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 169 legacy system modernization consultancies based in Mexico

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Legacy system modernization consultancies based in Mexico at a glance

As of Sep 28, 2026

18.7%Verified-email coverage

11.1Average contacts per company

11-50Median size (employees)

10.1%Largest-city concentration · Ciudad De Mexico

Sep 28, 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 worldwide rather than for Mexico, so it is reported there. Company counts and contact totals on this page are exact for Mexico, over 169 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 Mexico 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 Mexico 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, 352 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.

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 Mexico?

RevenueBase identified 169 legacy system modernization consultancies headquartered in Mexico 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?

GCG, headquartered in Miguel Hidalgo, tops this list with the largest team on record.

Which city has the most legacy system modernization consultancies?

Ciudad De Mexico leads with 17 headquartered companies, followed by Monterrey (16) and Mexico (8).

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 352 verified decision-maker contacts tracked across these 169 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.