Company lists · Data refreshed September 2026

Top 25 Custom software developers based in Spain

Name: Custom software developers based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 1, 2026 1,035 companies tracked

RevenueBase identified 1,035 custom software developers headquartered in Spain as of September 2026 and tracks 7,450 professional contacts across them, including 1,079 with verified work emails and 99 with mobile numbers. Madrid is the largest hub.

This list covers custom software developers 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 1, 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 RevenueBase Smart Search rating on every row Refreshed Sep 1, 2026 86% judged on-target in blind review

1,035Companies

7,450Contacts tracked

1,079Verified emails

99Mobile numbers

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The 25 largest custom software developers based in Spain

Ranked by team size

Top 25 of 1,035 custom software developers based in Spain, ranked by team size, largest first. Data refreshed Sep 1, 2026. RevenueBase Smart Search rates how each company's information relates to custom software developers: 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	Atsistemas	Partial evidence	Madrid, Spain	1,001-5,000	391 contacts →
	Partial 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 1, 2026
2	Metaenlace Sistemas DE Información	Indirect evidence	Murcia., Spain	201-500	268 contacts →
	Indirect evidence “Diseñamos soluciones informáticas únicas e inteligentes, flexibles y adaptadas a las necesidades de nuestros clientes, aplicando talento y experiencia.” Source: RevenueBase Database · checked Sep 1, 2026
3	Convotis Iberia	Indirect evidence	Elche, Spain	1,001-5,000	208 contacts →
	Indirect evidence “TERALCO GROUP es un referente de desarrollo tecnológico que impulsa la transformación digital de tu empresa aportando soluciones a medida y creando ventajas competitivas, basadas…” Source: RevenueBase Database · checked Sep 1, 2026
4	Trevenque Group	Indirect evidence	Granada, Spain	51-200	188 contacts →
	Indirect evidence “Trevenque Sistemas de Información nace en 1992 con el principal reto de convertirse en uno de los primeros grupos empresariales, capaz de ayudar a las empresas a mejorar sus…” Source: RevenueBase Database · checked Sep 1, 2026
5	Bitbox S.L	Partial evidence	Telde, Spain	201-500	187 contacts →
	Partial evidence “Estamos especializados en el desarrollo de todo tipo de soluciones de software, desde aplicaciones web, escritorio, smartphones, tablets, capturadores ¡y muchas más!” Source: RevenueBase Database · checked Sep 1, 2026
6	Nano Nino INC	Indirect evidence	Alicante, Spain	51-200	165 contacts →
	Indirect evidence “Welcome to Nano Nino Inc.” Source: RevenueBase Database · checked Sep 1, 2026
7	Innocv Solutions	Indirect evidence	Madrid, Spain	51-200	151 contacts →
	Indirect evidence “INNOCV es una empresa sostenible que se diferencia por poner a las personas en el centro de sus decisiones, mejoramos cada año la calidad de vida de los que trabajamos en ella…” Source: RevenueBase Database · checked Sep 1, 2026
8	Nazaries Intelligenia	Indirect evidence	Granada, Spain	51-200	134 contacts →
	Indirect evidence “With over 15 years of experience and a team of 170+ passionate professionals, we are a dynamic and innovative technology partner dedicated to driving transformative change for…” Source: RevenueBase Database · checked Sep 1, 2026
9	Premium Minds	Indirect evidence	Madrid, Spain	51-200	126 contacts →
	Indirect evidence “Passionate problem solvers driving business growth.” Source: RevenueBase Database · checked Sep 1, 2026
10	Carver Advanced Systems S.L	Indirect evidence	Barcelona, Spain	51-200	97 contacts →
	Indirect evidence “Carver Advanced Systems es una empresa con sede en Barcelona, fundada el año 2002 y orientada a la realización de servicios en el ámbito de las Tecnologías de la Información, con…” Source: RevenueBase Database · checked Sep 1, 2026
11	Slashmobility	Indirect evidence	Barcelona, Spain	51-200	94 contacts →
	Indirect evidence “We are a Mobile Corporate Solutions company founded in Barcelona in 2010, our mission is focused on accelerating the technological digitalization of society through 360º Mobile…” Source: RevenueBase Database · checked Sep 1, 2026
12	Mindfactory	Partial evidence	Barcelona, Spain	11-50	72 contacts →
	Partial evidence “Somos una empresa de desarrollo de software especializada en transformar ideas en soluciones tecnológicas innovadoras.” Source: RevenueBase Database · checked Sep 1, 2026
13	Itequia	Indirect evidence	Barcelona, Spain	51-200	54 contacts →
	Indirect evidence “Our selection of technologies and our methodology allow us to create "code" and "low-code" solutions in less time.” Source: RevenueBase Database · checked Sep 1, 2026
14	Qualitapps	Partial evidence	Barcelona, Spain	51-200	49 contacts →
	Partial evidence “At QualitApps, we are experts in software development, such as web and mobile applications, web design and eCommerce.” Source: RevenueBase Database · checked Sep 1, 2026
15	Meisters Solutions	Partial evidence	Madrid, Spain	51-200	46 contacts →
	Partial evidence “Meisters Solutions is a software development and digital services company whose goal is to become part of the infrastructure of its clients.” Source: RevenueBase Database · checked Sep 1, 2026
16	Fdsa Desarrollo	Partial evidence	Palma, Spain	51-200	44 contacts →
	Partial evidence “Una empresa mallorquina especializada en desarrollo de software B2B a medida.” Source: RevenueBase Database · checked Sep 1, 2026
17	SFY By Plexus	Indirect evidence	Barcelona, Spain	11-50	43 contacts →
	Indirect evidence “Desarrollo de Aplicaciones Iphone Ipad Android, y web.” Source: RevenueBase Database · checked Sep 1, 2026
18	Aditelsa	Partial evidence	Madrid, Spain	51-200	43 contacts →
	Partial evidence “Aditelsa fue fundada en 2002 y a lo largo de los años ha ido consolidando un sólido prestigio en el área de Desarrollos y Proyectos Software, especialmente en Gestores de Bases de…” Source: RevenueBase Database · checked Sep 1, 2026
19	540	Partial evidence	Spain	11-50	34 contacts →
	Partial evidence “Somos una empresa de desarrollo de software y nuestro propósito es hacer felices a todos las personas que intervienen en el desarrollo de software.” Source: RevenueBase Database · checked Sep 1, 2026
20	Actio Procesos Y Tecnología	Indirect evidence	Zaragoza, Spain	51-200	29 contacts →
	Indirect evidence “Somos una consultora especializada en el desarrollo y puesta en marcha de soluciones tecnológicas que ayudan a nuestros clientes a transformar y mejorar su actividad.” Source: RevenueBase Database · checked Sep 1, 2026
21	Starshot Software	Strong evidence	Leida, Spain	51-200	27 contacts →
	Strong evidence “Starshot is a software development company with a background in game development, bringing a unique approach to building custom digital solutions.” Source: RevenueBase Database · checked Sep 1, 2026
22	Aner Sistemas Informaticos, S.L	Indirect evidence	Zarautz, Spain	51-200	26 contacts →
	Indirect evidence “La tecnología no sirve para nada sin un propósito concreto.” Source: RevenueBase Database · checked Sep 1, 2026
23	Salutic	Partial evidence	Rincon De La Victoria, Spain	11-50	24 contacts →
	Partial evidence “Desarrollamos software a medida con diferentes tecnologías y metodología ágil.” Source: RevenueBase Database · checked Sep 1, 2026
24	DEMPO	Partial evidence	Madrid, Spain	11-50	23 contacts →
	Partial evidence “Dempo, como nuestro nombre lo indica, es una empresa en crecimiento exponencial potenciando la transformación digital, especializada en desarrollo de software y servicios de…” Source: RevenueBase Database · checked Sep 1, 2026
25	Iagt 'amazing Software'	Partial evidence	Sevilla, Spain	11-50	22 contacts →
	Partial evidence “IAGT es una ingeniería tecnológica, con factoría de software propia, que desarrolla soluciones empresariales a medida.” Source: RevenueBase Database · checked Sep 1, 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: custom software developers. 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 custom software developers.
Partial evidence: Its own public description names part of custom software developers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name custom software developers. 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 1,035 custom software developers based in Spain

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Custom software developers based in Spain at a glance

As of Sep 1, 2026

14.5%Verified-email coverage

1.3%Mobile-number coverage

7.2Average contacts per company

1-10Median size (employees)

17.3%Largest-city concentration · Madrid

Sep 1, 2026Page data refreshed

Companies by employee count

1-10

723

11-50

256

51-200

201-500

501-1,000

1,001-5,000

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 custom software developers, 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 “custom software developers”. 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 custom software developers), 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 custom software developers, 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, 1,079 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 1, 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.

Custom software developers 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 custom software developers, 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 custom software developers are there based in Spain?

RevenueBase identified 1,035 custom software developers 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?

Atsistemas, headquartered in Madrid, tops this list with the largest team on record.

Which city has the most custom software developers?

Madrid leads with 179 headquartered companies, followed by Barcelona (141) and Valencia (57).

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 1,079 verified decision-maker contacts tracked across these 1,035 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 1, 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.