Company lists · Data refreshed September 2026

Top 25 Enterprise telecom consulting companies based in Spain

Name: Enterprise telecom consulting companies based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 2, 2026 500 companies tracked

RevenueBase identified 500 enterprise telecom consulting companies headquartered in Spain as of September 2026 and tracks 7,523 professional contacts across them, including 841 with verified work emails and 91 with mobile numbers. Madrid is the largest hub.

This list covers enterprise telecom consulting companies 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 2, 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 2, 2026 86% judged on-target in blind review

500Companies

7,523Contacts tracked

841Verified emails

91Mobile numbers

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The 25 largest enterprise telecom consulting companies based in Spain

Ranked by team size

Top 25 of 500 enterprise telecom consulting companies based in Spain, ranked by team size, largest first. Data refreshed Sep 2, 2026. RevenueBase Smart Search rates how each company's information relates to enterprise telecom consulting companies: 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	Zelenza	Indirect evidence	Getafe, Spain	1,001-5,000	1,123 contacts →
	Indirect evidence “En Zelenza somos líderes en servicios integrados TIC, Ingeniería de Redes Telco, Defensa y Seguridad y Customer Experience.” Source: RevenueBase Database · checked Sep 2, 2026
2	Nunsys	Indirect evidence	Puerto De Sagunto Valencia, Spain	1,001-5,000	738 contacts →
	Indirect evidence “NUNSYS es una empresa especializada en la Implantación de Soluciones Integrales de Tecnología.” Source: RevenueBase Database · checked Sep 2, 2026
3	NAE	Strong evidence	Madrid, Spain	501-1,000	504 contacts →
	Strong evidence “Nae is an international consulting firm specialized in the telecom sector, providing deal & strategy, business, and technology advisory services.” Source: RevenueBase Database · checked Sep 2, 2026
4	SIRT	Indirect evidence	Zaragoza, Spain	201-500	441 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 2, 2026
5	Airon Group	Indirect evidence	Madrid, Spain	201-500	162 contacts →
	Indirect evidence “El Grupo AirON es una compañía de consultoría e innovación, servicios tecnológicos y outsourcing.” Source: RevenueBase Database · checked Sep 2, 2026
6	Experience IT Solutions	Partial evidence	Boecillo, Spain	201-500	153 contacts →
	Partial evidence “eXperience es una empresa de servicios orientada al mercado de las Tecnologías de la Información y las Telecomunicaciones, dando soluciones integrales en las áreas de consultoría…” Source: RevenueBase Database · checked Sep 2, 2026
7	Aldaba	Indirect evidence	A Coruna, Spain	51-200	148 contacts →
	Indirect evidence “Somos ALDABA.” Source: RevenueBase Database · checked Sep 2, 2026
8	Smartel España	Strong evidence	Camas, Spain	51-200	110 contacts →
	Strong evidence “Smart Telecom Consulting, empresa de ingeniería especializada en el campo de la telefonia móvil ofreciendo soluciones integrales a nuestros clientes desde el año 2004.” Source: RevenueBase Database · checked Sep 2, 2026
9	Einzelnet	Indirect evidence	Barcelona, Spain	51-200	107 contacts →
	Indirect evidence “EinzelNet es parte del ecosistema de Unikal, un especialista de especialistas con un extenso porfolio de servicios diseñado para de responder a las necesidades tecnológicas de…” Source: RevenueBase Database · checked Sep 2, 2026
10	MDTEL	Partial evidence	Madrid, Spain	51-200	91 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 2, 2026
11	BE Beyond	Indirect evidence	Mairena Del Aljarafe, Spain	51-200	89 contacts →
	Indirect evidence “Beyond Mobility es una consultora con amplia experiencia en proyectos de comunicaciones y tecnológicos.” Source: RevenueBase Database · checked Sep 2, 2026
12	B2com	Partial evidence	Valencia, Spain	51-200	72 contacts →
	Partial 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 2, 2026
13	Businessgo	Indirect evidence	Madrid, Spain	51-200	61 contacts →
	Indirect evidence “Nos mueve la pasión por el trabajo bien hecho.” Source: RevenueBase Database · checked Sep 2, 2026
14	Contecnow	Strong evidence	Barcelona, Spain	51-200	59 contacts →
	Strong evidence “Contec Consulting es una consultoría independiente de telecomunicaciones, con capital 100 % nacional y creada en el año Damos soporte a nuestros clientes en los siguientes pilares…” Source: RevenueBase Database · checked Sep 2, 2026
15	Divigroup	Partial evidence	Madrid, Spain	51-200	51 contacts →
	Partial evidence “Divigroup is an engineering and operational consulting company, with field experience, able to offer its clients high quality services, guaranteeing professional results based on…” Source: RevenueBase Database · checked Sep 2, 2026
16	ISP Grup	Partial evidence	Les Franqueses Del Valles, Spain	201-500	50 contacts →
	Partial evidence “ISP Grup nació en con la visión de que las telecomunicaciones serían el futuro.” Source: RevenueBase Database · checked Sep 2, 2026
17	Gotor Comunicaciones	Partial evidence	Zaragoza, Spain	51-200	44 contacts →
	Partial 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 2, 2026
18	Acuntia Axians	Indirect evidence	Madrid, Spain	501-1,000	38 contacts →
	Indirect evidence “Actualmente Axians España” Source: RevenueBase Database · checked Sep 2, 2026
19	Autronic Comunicaciones	Indirect evidence	Badajoz, Spain	51-200	34 contacts →
	Indirect evidence “EMPRESA Ofrecemos a nuestros clientes un servicio global de ingeniería de sistemas integrales, especializados en proyectos llave en mano y desarrollados con el máximo compromiso…” Source: RevenueBase Database · checked Sep 2, 2026
20	Zertia Telecomunicaciones S.L	Partial evidence	Madrid, Spain	51-200	29 contacts →
	Partial evidence “Zertia Telecomunicaciones es un proveedor global de Servicios Gestionados de Telecomunicaciones para empresas, que ofrece soluciones y proyectos a medida, encargándose de la…” Source: RevenueBase Database · checked Sep 2, 2026
21	Serval Networks	Indirect evidence	Alcobendas, Spain	51-200	28 contacts →
	Indirect evidence “SERVAL NETWORKS somos una empresa consultora de Ciberseguridad e Infraestructura de Comunicaciones, con foco en el mercado español de grandes y medianas empresas y operadores de…” Source: RevenueBase Database · checked Sep 2, 2026
22	TRC	Partial evidence	Madrid, Spain	51-200	25 contacts →
	Partial evidence “TRC se especializa en ofrecer servicios de Integración de Sistemas, Ingeniería de Redes, Desarrollo de Software y Telecomunicaciones a profesionales y a empresas.” Source: RevenueBase Database · checked Sep 2, 2026
23	Leadmarket	Strong evidence	Pozuelo De Alarcon, Spain	51-200	23 contacts →
	Strong evidence “LeadMarket is a consulting agency, formed by a team of professionals with a vast experience in the IT's and Telecommunications market.” Source: RevenueBase Database · checked Sep 2, 2026
24	Sercaman	Indirect evidence	Toledo, Spain	51-200	23 contacts →
	Indirect evidence “Adaptamos la tecnología más actualizada a cada necesidad de una manera personalizada.” Source: RevenueBase Database · checked Sep 2, 2026
25	ISC	Indirect evidence	Spain	51-200	22 contacts →
	Indirect evidence “Conectamos tus proyectos.” Source: RevenueBase Database · checked Sep 2, 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: enterprise telecom consulting companies. 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 enterprise telecom consulting companies.
Partial evidence: Its own public description names part of enterprise telecom consulting companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name enterprise telecom consulting companies. 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 500 enterprise telecom consulting companies based in Spain

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Enterprise telecom consulting companies based in Spain at a glance

As of Sep 2, 2026

11.2%Verified-email coverage

1.2%Mobile-number coverage

15.0Average contacts per company

11-50Median size (employees)

20.8%Largest-city concentration · Madrid

Sep 2, 2026Page data refreshed

Companies by employee count

1-10

245

11-50

191

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 enterprise telecom consulting companies, 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 “enterprise telecom consulting companies”. 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 enterprise telecom consulting companies), 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 enterprise telecom consulting companies, 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, 841 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 2, 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.

Enterprise telecom consulting companies 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 enterprise telecom consulting companies, 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 enterprise telecom consulting companies are there based in Spain?

RevenueBase identified 500 enterprise telecom consulting companies 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?

Zelenza, headquartered in Getafe, tops this list with the largest team on record.

Which city has the most enterprise telecom consulting companies?

Madrid leads with 104 headquartered companies, followed by Barcelona (49) 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 841 verified decision-maker contacts tracked across these 500 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 2, 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.