Company lists · Data refreshed September 2026

Top 25 Legacy system modernization consultants based in Spain

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

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 430 companies tracked

RevenueBase identified 430 legacy system modernization consultants headquartered in Spain as of September 2026 and tracks 8,070 professional contacts across them, including 1,420 with verified work emails. Madrid is the largest hub.

This list covers legacy system modernization consultants headquartered in Spain, 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

430Companies

8,070Contacts tracked

1,420Verified emails

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The 25 largest legacy system modernization consultants based in Spain

Ranked by team size

Top 25 of 430 legacy system modernization consultants based in Spain, 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	SIRT	Indirect evidence	Barcelona, SpainHQ checked Sep 20, 2026	201-500	449 contacts →
	Indirect evidence “Experiencia, especialización y calidad de servicio son los tres valores clave en los que SIRT basa su actividad y la relación con sus clientes.” Source: RevenueBase Database · checked Sep 20, 2026
2	Atsistemas	Indirect evidence	Las Rozas, SpainHQ checked Sep 20, 2026	1,001-5,000	391 contacts →
	Indirect evidence “With about 2200 experts atSistemas delivers IT consulting, services and software development which to help organizations to be more efficient and profitable.” Source: RevenueBase Database · checked Sep 20, 2026
3	Excelia	Indirect evidence	Pozuelo De Alarcón, SpainHQ checked Sep 20, 2026	201-500	317 contacts →
	Indirect evidence “We are a global consulting, technology, and professional services firm with over 25 years of experience.” Source: RevenueBase Database · checked Sep 20, 2026
4	Timestamp España	Strong evidence	Pozuelo De Alarcón, SpainHQ checked Sep 20, 2026	1,001-5,000	284 contacts →
	Strong evidence “Timestamp is a leading IT consultancy with over 20 years’ experience in digital transformation and systems integration.” Source: RevenueBase Database · checked Sep 20, 2026
5	Lognext	Partial evidence	Madrid, SpainHQ checked Sep 20, 2026	201-500	215 contacts →
	Partial evidence “With more than 17 years of experience and trajectory in the IT world, LOGNEXT offers solutions to our clients and professional careers to our consultants in technology projects…” Source: RevenueBase Database · checked Sep 20, 2026
6	Lider IT Consulting	Indirect evidence	Llanera, SpainHQ checked Sep 20, 2026	201-500	204 contacts →
	Indirect evidence “En LIDER IT Consulting llevamos más de 40 años ayudando a nuestros clientes a mejorar la gestión mediante la consultoría, el desarrollo y la implantación de soluciones integradas.” Source: RevenueBase Database · checked Sep 20, 2026
7	DISID	Indirect evidence	Valencia, SpainHQ checked Sep 20, 2026	51-200	178 contacts →
	Indirect evidence “DISID is a technology consulting company that carries out Digital Transformation projects following a model of technological partner, we help our clients with the latest…” Source: RevenueBase Database · checked Sep 20, 2026
8	Mindata	Indirect evidence	Madrid, SpainHQ checked Sep 20, 2026	n/a	177 contacts →
	Indirect evidence “es una ó, ayudamos a nuestros clientes a resolver sus principales retos en el campo de las tecnologías de la información.” Source: RevenueBase Database · checked Sep 20, 2026
9	Desic Consultora Tecnológica	Indirect evidence	Las Palmas De Gran Canaria, SpainHQ checked Sep 20, 2026	201-500	165 contacts →
	Indirect evidence “Soluciones tecnológicas para rentabilizar su empresa.” Source: RevenueBase Database · checked Sep 20, 2026
10	Inerza, S.A	Indirect evidence	Las Palmas De Gran Canaria, SpainHQ checked Sep 20, 2026	51-200	162 contacts →
	Indirect evidence “INERZA es una organización de consultoría, especializada en la implantación de soluciones TIC, en el desarrollo de software y en servicios de outsourcing (de procesos de negocio…” Source: RevenueBase Database · checked Sep 20, 2026
11	Ipm, A Ricoh Company	Indirect evidence	Sant Cugat Del Valles, SpainHQ checked Sep 20, 2026	201-500	138 contacts →
	Indirect evidence “Con más de cuatro décadas de presencia y de experiencia en el mercado de la Península Ibérica, IPM, a Ricoh Company proporciona soluciones estratégicas en el ámbito de las…” Source: RevenueBase Database · checked Sep 20, 2026
12	Nologin	Indirect evidence	Zaragoza, SpainHQ checked Sep 20, 2026	51-200	125 contacts →
	Indirect evidence “Nologin is a company with advanced knowhow in the field of Information Technology, providing quality services and solutions for clients worldwide.” Source: RevenueBase Database · checked Sep 20, 2026
13	Alcorce Telecomunicaciones SL	Indirect evidence	Madrid, SpainHQ checked Sep 20, 2026	51-200	107 contacts →
	Indirect evidence “Cada día nos esforzamos por transformar y optimizar organizaciones mediante la implementación de soluciones tecnológicas seguras, eficientes y vanguardistas, evolucionamos contigo…” Source: RevenueBase Database · checked Sep 20, 2026
14	Consultia IT	Indirect evidence	Madrid, SpainHQ checked Sep 20, 2026	51-200	80 contacts →
	Indirect evidence “Consultia IT is an expert team within Linkroad, focused on pragmatic execution across strategy, operations and technology.” Source: RevenueBase Database · checked Sep 20, 2026
15	Prosol	Indirect evidence	Las Matas (las Rozas), SpainHQ checked Sep 20, 2026	51-200	72 contacts →
	Indirect evidence “PROSOL es una compañía IT que ayuda a las empresas a mejorar su arquitectura tecnológica y a estar a la última en la innovación digital, haciendo posible su proceso de…” Source: RevenueBase Database · checked Sep 20, 2026
16	Itera Process España	Indirect evidence	Madrid, SpainHQ checked Sep 20, 2026	201-500	71 contacts →
	Indirect evidence “Somos una consultora de tecnología de la información que transforma negocios mediante soluciones innovadoras y personalizadas.” Source: RevenueBase Database · checked Sep 20, 2026
17	Neteris Consulting	Indirect evidence	Madrid, SpainHQ checked Sep 20, 2026	51-200	71 contacts →
	Indirect evidence “Neteris es parte del ecosistema de Unikal, un especialista de especialistas con un porfolio integral de servicios diseñado para impulsar la evolución tecnológica de las empresas.” Source: RevenueBase Database · checked Sep 20, 2026
18	HSI	Indirect evidence	Cornellà De Llobregat, SpainHQ checked Sep 20, 2026	51-200	67 contacts →
	Indirect evidence “HSI Grup nace en 1988 con el objetivo de ofrecer un sólido servicio de Mantenimiento Informático Profesional y Empresarial.” Source: RevenueBase Database · checked Sep 20, 2026
19	Arena. Financial Tech	Indirect evidence	Madrid, SpainHQ checked Sep 20, 2026	51-200	64 contacts →
	Indirect evidence “ARENA Consulting es una empresa especializada en Tecnologías de la Información, que ofrece servicios de Consultoría, Desarrollo de Aplicaciones, Soporte y Administración de…” Source: RevenueBase Database · checked Sep 20, 2026
20	Business Insights	Indirect evidence	Barcelona, SpainHQ checked Sep 20, 2026	51-200	64 contacts →
	Indirect evidence “Tu tecnología impulsa tu negocio o lo frena?” Source: RevenueBase Database · checked Sep 20, 2026
21	ECNA	Indirect evidence	Bilbao, SpainHQ checked Sep 20, 2026	51-200	59 contacts →
	Indirect evidence “Ecna Informática es una Ingeniería de Software, cuyo propósito es ayudar a tu compañía a diseñar e implantar Sistemas de Información, convirtiéndose en el partner tecnológico que…” Source: RevenueBase Database · checked Sep 20, 2026
22	Ricopia Technologies	Indirect evidence	Alcalá De Henares, SpainHQ checked Sep 20, 2026	51-200	54 contacts →
	Indirect evidence “En Ricopia te asesoramos para llevar a cabo un proyecto de transformación digital 360º en tu empresa.” Source: RevenueBase Database · checked Sep 20, 2026
23	Vunkers IT Experts	Indirect evidence	Lleida, SpainHQ checked Sep 20, 2026	51-200	52 contacts →
	Indirect evidence “En un entorno digital cada vez más competitivo, las empresas necesitan más que tecnología: necesitan un socio estratégico.” Source: RevenueBase Database · checked Sep 20, 2026
24	TSD Consulting	Indirect evidence	Barcelona, SpainHQ checked Sep 20, 2026	51-200	51 contacts →
	Indirect evidence “The world changes.” Source: RevenueBase Database · checked Sep 20, 2026
25	Disi Servicios Informáticos	Indirect evidence	Tortosa, SpainHQ checked Sep 20, 2026	11-50	49 contacts →
	Indirect evidence “Somos una empresa servicios informáticos para la empresa.” Source: RevenueBase Database · checked Sep 20, 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 consultants. 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 consultants.
Partial evidence: Its own public description names part of legacy system modernization consultants, 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 consultants. 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 430 legacy system modernization consultants based in Spain

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Legacy system modernization consultants based in Spain at a glance

As of Sep 20, 2026

17.6%Verified-email coverage

18.8Average contacts per company

1-10Median size (employees)

23.5%Largest-city concentration · Madrid

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

236

11-50

133

51-200

201-500

1,001-5,000

5,001-10,000

Email recency for this list is measured worldwide rather than for Spain, so it is reported there. Company counts and contact totals on this page are exact for Spain, over 430 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 Spain 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 Spain 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, 1,420 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

Legacy system modernization consultants in Madrid101
Legacy system modernization consultants in Barcelona55

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 Spain?

RevenueBase identified 430 legacy system modernization consultants headquartered in Spain 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?

SIRT, headquartered in Barcelona, tops this list with the largest team on record.

Which city has the most legacy system modernization consultants?

Madrid leads with 101 headquartered companies, followed by Barcelona (55) and Valencia (15).

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 1,420 verified decision-maker contacts tracked across these 430 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.