Company lists · Data refreshed September 2026

Top 25 Communication system integrators based in Spain

Name: Communication system integrators based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 452 companies tracked

RevenueBase identified 452 communication system integrators headquartered in Spain as of September 2026 and tracks 61,351 professional contacts across them, including 6,724 with verified work emails. Madrid is the largest hub.

This list covers communication system integrators 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 19, 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 19, 2026 86% judged on-target in blind review

452Companies

61,351Contacts tracked

6,724Verified emails

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The 25 largest communication system integrators based in Spain

Ranked by team size

Top 25 of 452 communication system integrators based in Spain, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to communication system integrators: 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	Telefónica	Indirect evidence	Madrid, SpainHQ checked Sep 19, 2026	10001+	54,718 contacts →
	Indirect evidence “Telefónica is today one of the largest telecommunications companies in the world in terms of market capitalisation and number of customers.” Source: RevenueBase Database · checked Sep 19, 2026
2	Nunsys	Indirect evidence	Paterna, SpainHQ checked Sep 19, 2026	1,001-5,000	739 contacts →
	Indirect evidence “NUNSYS es una empresa especializada en la Implantación de Soluciones Integrales de Tecnología.” Source: RevenueBase Database · checked Sep 19, 2026
3	Logicalis Spain	Indirect evidence	Barcelona, SpainHQ checked Sep 19, 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 19, 2026
4	Sistem	Indirect evidence	Getafe, SpainHQ checked Sep 19, 2026	501-1,000	320 contacts →
	Indirect evidence “Perteneciente al Grupo CPS, somos una empresa integradora de sistemas con vocación internacional que ofrece a sus clientes soluciones globales, en los mercados del Transporte…” Source: RevenueBase Database · checked Sep 19, 2026
5	Powernet	Indirect evidence	Madrid, SpainHQ checked Sep 19, 2026	51-200	150 contacts →
	Indirect evidence “Somos una marca global de Ingeniería en integración de soluciones de Telecomunicaciones y Sistemas IT con más de 35 años de experiencia.” Source: RevenueBase Database · checked Sep 19, 2026
6	Ambar Telecomunicaciones	Indirect evidence	Santander, SpainHQ checked Sep 19, 2026	201-500	126 contacts →
	Indirect evidence “Ámbar Telecomunicaciones es una empresa de ingeniería especializada en la integración global de sistemas de comunicación, que centra su actividad en el diseño, instalación y…” Source: RevenueBase Database · checked Sep 19, 2026
7	Instelca	Indirect evidence	Málaga, SpainHQ checked Sep 19, 2026	201-500	118 contacts →
	Indirect evidence “El Grupo INSTELCA es proveedor global de servicios de Telecomunicaciones, Redes e Informática con más de 30 años de experiencia y con una clara orientación al clientes que nos ha…” Source: RevenueBase Database · checked Sep 19, 2026
8	MDTEL	Partial evidence	Madrid, SpainHQ checked Sep 19, 2026	51-200	93 contacts →
	Partial evidence “mdtel is a manufacturer and integrator of corporate telecommunications solutions for business environments with more than 20 years of experience.” Source: RevenueBase Database · checked Sep 19, 2026
9	Sarenet	Indirect evidence	Zamudio, SpainHQ checked Sep 19, 2026	51-200	90 contacts →
	Indirect evidence “Sarenet es el proveedor de voz y datos con más experiencia de cuantos hoy operan en España.” Source: RevenueBase Database · checked Sep 19, 2026
10	BE Beyond	Indirect evidence	Mairena Del Aljarafe, SpainHQ checked Sep 19, 2026	51-200	90 contacts →
	Indirect evidence “Beyond Mobility es una consultora con amplia experiencia en proyectos de comunicaciones y tecnológicos.” Source: RevenueBase Database · checked Sep 19, 2026
11	Coyser SA	Indirect evidence	Madrid, SpainHQ checked Sep 19, 2026	51-200	88 contacts →
	Indirect evidence “Coyser S.A.” Source: RevenueBase Database · checked Sep 19, 2026
12	Sortis	Indirect evidence	Madrid, SpainHQ checked Sep 19, 2026	51-200	82 contacts →
	Indirect evidence “SORTIS: Líder en Soluciones Integrales de Telecomunicaciones y TI desde 2005.” Source: RevenueBase Database · checked Sep 19, 2026
13	CIE Tecnologías	Indirect evidence	Arteixo, SpainHQ checked Sep 19, 2026	51-200	78 contacts →
	Indirect evidence “CIE Tecnologías, es hoy una empresa establecida en el sector de las telecomunicaciones y desarrolla su actividad centrándose en el diseño e implementación de tecnologías e…” Source: RevenueBase Database · checked Sep 19, 2026
14	B2com	Indirect evidence	Madrid, SpainHQ checked Sep 19, 2026	51-200	72 contacts →
	Indirect evidence “Premium Numbers, operador de telecomunicaciones inscrito en la CMT y con numeración propia, fue fundada en el año 2.001, siendo una de las empresas del sector de la telefonía de…” Source: RevenueBase Database · checked Sep 19, 2026
15	Datatronics	Strong evidence	Madrid, SpainHQ checked Sep 19, 2026	11-50	63 contacts →
	Strong evidence “Datatronics is a seasoned Telco System Integrator with over thirty years of experience supporting communication service providers, from small operators and MVNOs to large…” Source: RevenueBase Database · checked Sep 19, 2026
16	Unitecnic	Indirect evidence	Barcelona, SpainHQ checked Sep 19, 2026	51-200	61 contacts →
	Indirect evidence “UNITECNIC es una ingeniería broadcast, audiovisual y de entorno médico perteneciente a GRUP MEDIAPRO.” Source: RevenueBase Database · checked Sep 19, 2026
17	Makenai Solutions, Innovation & Creative Ideas	Indirect evidence	Madrid, SpainHQ checked Sep 19, 2026	11-50	57 contacts →
	Indirect evidence “Transformamos lo complejo en soluciones tecnológicas simples y eficaces.” Source: RevenueBase Database · checked Sep 19, 2026
18	Soditel	Indirect evidence	Madrid, SpainHQ checked Sep 19, 2026	11-50	55 contacts →
	Indirect evidence “SODITEL NUEVO PARTNER TECNOLÓGICO DE AASTRA EN ESPAÑA El gran nivel profesional y su avalada y reconocida garantía en la prestación de servicios profesionales, han convertido a…” Source: RevenueBase Database · checked Sep 19, 2026
19	MC Ingenieros	Indirect evidence	Barcelona, SpainHQ checked Sep 19, 2026	11-50	54 contacts →
	Indirect evidence “MC Ingenieros es una ingeniería de Integración de sistemas Audiovisuales.” Source: RevenueBase Database · checked Sep 19, 2026
20	Grupo Micro BR Comunicaciones	Indirect evidence	Barcelona, SpainHQ checked Sep 19, 2026	11-50	52 contacts →
	Indirect evidence “Micro BR, fundada en 1987 por profesionales del ámbito del Networking, es la empresa nacional especializada en soluciones de comunicaciones y seguridad IT para el sector…” Source: RevenueBase Database · checked Sep 19, 2026
21	ISP Grup	Indirect evidence	Les Franqueses Del Vallés, SpainHQ checked Sep 19, 2026	201-500	50 contacts →
	Indirect evidence “ISP Grup nació en con la visión de que las telecomunicaciones serían el futuro.” Source: RevenueBase Database · checked Sep 19, 2026
22	Instel	Indirect evidence	Barcelona, SpainHQ checked Sep 19, 2026	11-50	46 contacts →
	Indirect evidence “Más de 50 años liderando la transformación digital Somos una empresa de servicios del sector de las telecomunicaciones, con un origen familiar, especialistas en la integración de…” Source: RevenueBase Database · checked Sep 19, 2026
23	Gotor Comunicaciones	Indirect evidence	Zaragoza, SpainHQ checked Sep 19, 2026	51-200	45 contacts →
	Indirect evidence “Ingeniería, Consultoría e Instalación de Telecomunicaciones Trabajamos a nivel local, regional y nacional tanto para pequeñas y medianas empresas como para grandes organizaciones.” Source: RevenueBase Database · checked Sep 19, 2026
24	Infordisa	Indirect evidence	Valls, SpainHQ checked Sep 19, 2026	11-50	40 contacts →
	Indirect evidence “Infordisa es va fundar l’any 1986 per oferir solucions a una nova tecnologia en creixement.” Source: RevenueBase Database · checked Sep 19, 2026
25	Viastore Systems España	Indirect evidence	Sant Cugat Del Vallès, SpainHQ checked Sep 19, 2026	51-200	39 contacts →
	Indirect evidence “En nuestros más de 135 años de historia, nos hemos ido transformando de la producción de corte de metales a una empresa de tecnología digital.” Source: RevenueBase Database · checked Sep 19, 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: communication system integrators. 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 communication system integrators.
Partial evidence: Its own public description names part of communication system integrators, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name communication system integrators. 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 452 communication system integrators based in Spain

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Communication system integrators based in Spain at a glance

As of Sep 19, 2026

11.0%Verified-email coverage

135.7Average contacts per company

11-50Median size (employees)

17.9%Largest-city concentration · Madrid

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

214

11-50

185

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 452 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 communication system integrators, 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 “communication system integrators”. 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 communication system integrators), 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 communication system integrators, 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, 6,724 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 19, 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.

Communication system integrators by metro

Communication system integrators in Madrid81
Communication system integrators in Barcelona46

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 communication system integrators, 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 communication system integrators are there based in Spain?

RevenueBase identified 452 communication system integrators 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?

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

Which city has the most communication system integrators?

Madrid leads with 81 headquartered companies, followed by Barcelona (46) and Malaga (14).

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 6,724 verified decision-maker contacts tracked across these 452 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 19, 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.