Company lists · Data refreshed September 2026

Top 24 Software engineering firms based in Spain

Name: Software engineering firms based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 6, 2026 2,966 companies tracked

RevenueBase identified 2,966 software engineering firms headquartered in Spain as of September 2026 and tracks 116,151 professional contacts across them, including 14,216 with verified work emails and 1,441 with mobile numbers. Madrid is the largest hub.

This list covers software engineering firms 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 6, 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 6, 2026 86% judged on-target in blind review

2,966Companies

116,151Contacts tracked

14,216Verified emails

1,441Mobile numbers

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The 24 largest software engineering firms based in Spain

Ranked by team size

Top 24 of 2,966 software engineering firms based in Spain, ranked by team size, largest first. Data refreshed Sep 6, 2026. RevenueBase Smart Search rates how each company's information relates to software engineering firms: 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	Seidor	Indirect evidence	Barcelona, SpainHQ checked Sep 6, 2026	5,001-10,000	6,133 contacts →
	Indirect evidence “At SEIDOR we help drive the transformation and competitiveness of our clients through technology and innovation, always focusing on the human value and prioritizing talents and…” Source: RevenueBase Database · checked Sep 6, 2026
2	GMV	Indirect evidence	Tres Cantos, SpainHQ checked Sep 6, 2026	1,001-5,000	3,351 contacts →
	Indirect evidence “At GMV, we design the future through technology.” Source: RevenueBase Database · checked Sep 6, 2026
3	BABEL	Indirect evidence	Las Rozas De Madrid, SpainHQ checked Sep 6, 2026	1,001-5,000	3,187 contacts →
	Indirect evidence “We are BABEL, an international team of professionals highly specialised in cutting-edge technologies.” Source: RevenueBase Database · checked Sep 6, 2026
4	VASS	Indirect evidence	Alcobendas, SpainHQ checked Sep 6, 2026	1,001-5,000	2,292 contacts →
	Indirect evidence “VASS is a global technology company specialized in generating business value through intelligent (digital) transformation, integrating technology, data, artificial intelligence…” Source: RevenueBase Database · checked Sep 6, 2026
5	Stratesys	Partial evidence	Madrid (headquarters), SpainHQ checked Sep 6, 2026	1,001-5,000	1,636 contacts →
	Partial evidence “We are a multinational company specialized in different leading technology platforms such as SAP, Salesforce, Microsoft, OpenText and other software providers that are part of our…” Source: RevenueBase Database · checked Sep 6, 2026
6	SICE	Indirect evidence	Alcobendas, SpainHQ checked Sep 6, 2026	1,001-5,000	1,327 contacts →
	Indirect evidence “Sociedad Ibérica de Construcciones Eléctricas (SICE) is a multinational company integrating systems, aimed at solving market needs.” Source: RevenueBase Database · checked Sep 6, 2026
7	Sngular	Indirect evidence	Madrid, SpainHQ checked Sep 6, 2026	1,001-5,000	1,171 contacts →
	Indirect evidence “Sngular is a next-generation technology partner that combines deep technical expertise with talent and tenacity to always deliver – that is the Sngular promise.” Source: RevenueBase Database · checked Sep 6, 2026
8	Soaint	Indirect evidence	Madrid, SpainHQ checked Sep 6, 2026	501-1,000	781 contacts →
	Indirect evidence “SOAINT is a global company with presence in 10 countries and nearly 800 people.” Source: RevenueBase Database · checked Sep 6, 2026
9	Teknei	Partial evidence	Bilbao, SpainHQ checked Sep 6, 2026	1,001-5,000	720 contacts →
	Partial evidence “Grupo Teknei es una empresa líder en el sector tecnológico, especializada en la consultoría, desarrollo de software y soluciones IT.” Source: RevenueBase Database · checked Sep 6, 2026
10	Paradigma Digital	Indirect evidence	Pozuelo De Alarcón, SpainHQ checked Sep 6, 2026	501-1,000	692 contacts →
	Indirect evidence “At Paradigma, we have a habit: we commit.” Source: RevenueBase Database · checked Sep 6, 2026
11	Kairos Digital Solutions	Indirect evidence	Madrid, SpainHQ checked Sep 6, 2026	501-1,000	679 contacts →
	Indirect evidence “Kairós is more than a technology company; we're a trusted partner empowering organizations to grow and evolve.” Source: RevenueBase Database · checked Sep 6, 2026
12	Sothis	Indirect evidence	Parque Tecnológico De Paterna, SpainHQ checked Sep 6, 2026	501-1,000	676 contacts →
	Indirect evidence “Sothis was founded in 2008 in order to lead a change in the way we offer information technology services, with a clear vision on the impact that technology can have on our…” Source: RevenueBase Database · checked Sep 6, 2026
13	Axpe Consulting	Indirect evidence	Madrid, SpainHQ checked Sep 6, 2026	1,001-5,000	655 contacts →
	Indirect evidence “AXPE CONSULTING S.L.” Source: RevenueBase Database · checked Sep 6, 2026
14	Seresco	Partial evidence	Oviedo, SpainHQ checked Sep 6, 2026	1,001-5,000	604 contacts →
	Partial evidence “Seresco is a Spanish company specialized in software solutions and IT services, with more than 45 years of experience and more than 500 professionals.” Source: RevenueBase Database · checked Sep 6, 2026
15	SII Group Spain	Indirect evidence	L’hospitalet De Llobregat, SpainHQ checked Sep 6, 2026	10001+	555 contacts →
	Indirect evidence “En SII Group Spain respondemos a las necesidades de diversas industrias a través de Servicios y Soluciones Digitales, IT e Ingeniería, con presencia en sectores estratégicos como…” Source: RevenueBase Database · checked Sep 6, 2026
16	Logicalis Spain	Indirect evidence	Barcelona, SpainHQ checked Sep 6, 2026	501-1,000	547 contacts →
	Indirect evidence “Logicalis es una compañía de referencia tanto en España como en los países en los que opera.” Source: RevenueBase Database · checked Sep 6, 2026
17	Optimissa	Indirect evidence	Madrid, SpainHQ checked Sep 6, 2026	1,001-5,000	522 contacts →
	Indirect evidence “Optimissa is a proactive consultation company serving clients in the capital markets industry, bridging the gap between business and technology with a focus on innovation.” Source: RevenueBase Database · checked Sep 6, 2026
18	Grupo Versia	Indirect evidence	Barakaldo, SpainHQ checked Sep 6, 2026	501-1,000	489 contacts →
	Indirect evidence “Grupo Versia es una compañía dedicada a la mejora de procesos de negocio de sus clientes.” Source: RevenueBase Database · checked Sep 6, 2026
19	Grupo Solutia	Indirect evidence	Sevilla, SpainHQ checked Sep 6, 2026	501-1,000	469 contacts →
	Indirect evidence “Desde julio de 2025, Grupo Solutia forma parte de Bechtle Group, líder europeo en soluciones y servicios TIC.” Source: RevenueBase Database · checked Sep 6, 2026
20	SIRT	Indirect evidence	Barcelona, SpainHQ checked Sep 6, 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 6, 2026
21	Experis España	Indirect evidence	Madrid, SpainHQ checked Sep 6, 2026	1,001-5,000	434 contacts →
	Indirect evidence “Experis es referente global en la selección de profesionales IT, y consultoría tecnológica para la implementación de proyectos y servicios gestionados.” Source: RevenueBase Database · checked Sep 6, 2026
22	Aubay Spain	Indirect evidence	Madrid, SpainHQ checked Sep 6, 2026	5,001-10,000	430 contacts →
	Indirect evidence “Aubay es una empresa de consultoría y servicios informáticos fundada en 1998 en Francia.” Source: RevenueBase Database · checked Sep 6, 2026
23	GTD	Indirect evidence	Barcelona, SpainHQ checked Sep 6, 2026	201-500	418 contacts →
	Indirect evidence “GTD is a high-tech company, committed to the design, integration and operation of complex, mission-critical applications and systems throughout the world.” Source: RevenueBase Database · checked Sep 6, 2026
24	ABAST	Indirect evidence	Barcelona, SpainHQ checked Sep 6, 2026	501-1,000	391 contacts →
	Indirect evidence “Somos una compañía independiente con más de 30 años en el mercado Español implantando soluciones tecnológicas completas, innovadoras y estratégicas para nuestros clientes.” Source: RevenueBase Database · checked Sep 6, 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: software engineering firms. 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 software engineering firms.
Partial evidence: Its own public description names part of software engineering firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name software engineering firms. 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 24 of 2,966 software engineering firms based in Spain

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Software engineering firms based in Spain at a glance

As of Sep 6, 2026

12.2%Verified-email coverage

1.2%Mobile-number coverage

39.2Average contacts per company

1-10Median size (employees)

23.0%Largest-city concentration · Madrid

Sep 6, 2026Page data refreshed

Companies by employee count

1-10

1,574

11-50

917

51-200

312

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

13,2380–30

84631–60

561–90

090–180

127180+

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 software engineering firms, 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 “software engineering firms”. 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 software engineering firms), 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 software engineering firms, 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, 14,216 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 6, 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.

Software engineering firms by metro

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 software engineering firms, 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 software engineering firms are there based in Spain?

RevenueBase identified 2,966 software engineering firms 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?

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

Which city has the most software engineering firms?

Madrid leads with 681 headquartered companies, followed by Barcelona (359) and Valencia (115).

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 14,216 verified decision-maker contacts tracked across these 2,966 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 6, 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.