Company lists · Data refreshed September 2026
Top 25 Back office outsourcing companies based in Spain
RevenueBase identified 88 back office outsourcing companies headquartered in Spain as of September 2026 and tracks 5,652 professional contacts across them, including 237 with verified work emails. Madrid is the largest hub.
This list covers back office outsourcing 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 14, 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.
The 25 largest back office outsourcing companies based in Spain
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,447 contacts → | ||||
Indirect evidence “Grupo Marktel es un grupo empresarial que ofrece soluciones globales a sus clientes en el ámbito de la externalziación de servicios con el máximo nivel de especialización en las…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 2 | 850 contacts → | ||||
Indirect evidence “Nos especializamos en la externalización de servicios a entidades financieras y nos reinventamos continuamente en un mercado cada vez más competitivo para lograr lo más…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 3 | 712 contacts → | ||||
Indirect evidence “Grupo BC es el líder en la externalización de procesos bancarios (BPO) tanto en el Sur de Europa como en Latinoamérica.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 4 | 418 contacts → | ||||
Indirect evidence “Tessi IBERIA nace en 1.997 y aunque en el inicio se centra en la gestión hipotecaria, ya desde sus orígenes nace con unos valores fundamentales, que todavía hoy perviven, y…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 5 | 305 contacts → | ||||
Partial evidence “The SELLBYTEL Group is one of the worldwide leading outsourcing specialists and part of Webhelp.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 6 | 278 contacts → | ||||
Indirect evidence “Empresa multi-servicio de activos inmobiliarios y procesos para las entidades financieras, organismos y compañías de todos los sectores.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 7 | 199 contacts → | ||||
Indirect evidence “Apostamos por la Transformación para adaptarnos y ser flexibles a las necesidades de nuestros clientes y fortalecer cada vez más nuestros mecanismos de seguimiento y trazabilidad…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 8 | 192 contacts → | ||||
Partial evidence “Bukit BPO es una compañía internacional dedicada al negocio del Business Process Outsourcing y que actúa como partner tecnológico y operacional para clientes de todo el mundo.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 9 | 56 contacts → | ||||
Indirect evidence “Somos una firma multidisciplinar, con más de 35 años de experiencia, especializados en la gestión y externalización de procesos de negocio financieros, recursos humanos, gestión…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 10 | 50 contacts → | ||||
Indirect evidence “Gemini Recoveries & Collections, a company, with expertise on full servicing (BPO) solutions covering the entire credit cycle: adquisition, loyalty programs, credit risk…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 11 | 42 contacts → | ||||
Indirect evidence “Nos dedicamos a la externalización de procesos de negocio y estamos especializados en los relacionados con la atención y gestión del cliente.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 12 | 40 contacts → | ||||
Indirect evidence “CONSTRUIMOS CLIENTES Proporcionamos soluciones de externalización a medida para empresas que necesitan agilidad, flexibilidad y resultados.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 13 | 31 contacts → | ||||
Indirect evidence “BJS Legal Services - Collections & BPO, permite a sus clientes centrarse en su Core Business.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 14 | 29 contacts → | ||||
Indirect evidence “GRUPO BASE es una compañía con más de 30 años de servicios de calidad a las empresas.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 15 | 17 contacts → | ||||
Indirect evidence “Informes y Gestiones es una empresa que desde el año 1993 ha sido un referente en la prestación de servicios integrales y líder en la externalización de procesos.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 16 | 15 contacts → | ||||
Indirect evidence “Somos líderes en externalización de procesos de negocio (BPO) altamente sensibles por su impacto sobre clientes o por su criticidad interna, como son los de las áreas comercial…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 17 | 13 contacts → | ||||
Indirect evidence “Services to Insurance Brokers and Insurance Companies.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 18 | 6 contacts → | ||||
Indirect evidence “Making paperwork easy” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 19 | 5 contacts → | ||||
Partial evidence “Firma profesional y altamente especializada en la externalización (outsourcing) de los servicios contable, tax compliance y gestión laboral y RRHH, con oficinas en Barcelona y…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 20 | 5 contacts → | ||||
Indirect evidence “GESTIONALIA es una empresa de servicios, filial de Vaciero, S.L.P, dedicada a la externalización de funciones y procesos de los departamentos de administración, finanzas y…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 21 | 2 contacts → | ||||
Indirect evidence “Alguna vez has pensado el tiempo que pierdes cada día o cómo podrías optimizar tus recursos?” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 22 | 2 contacts → | ||||
Indirect evidence “Ayudamos a las empresas desde la externalización de departamentos a tener las tareas administrativas bien ejecutadas y al día, con ahorro de tiempo y reducción de costes.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 23 | 2 contacts → | ||||
Indirect evidence “PDG Executive Consultants S.L.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 24 | 1 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 25 | 1 contacts → | ||||
Indirect evidence “Hoy más que nunca en un mundo cada día más competitivo, existe la convicción de las empresas de que es necesario tercerizar determinados servicios realizados en el pasado por…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
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: back office outsourcing 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 back office outsourcing companies.
- Partial evidence
- Its own public description names part of back office outsourcing companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name back office outsourcing 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 88 back office outsourcing companies based in Spain
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Back office outsourcing companies based in Spain at a glance
As of Sep 14, 2026Companies by employee count
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 88 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 back office outsourcing 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 “back office outsourcing 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 back office outsourcing 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 back office outsourcing 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, 237 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 14, 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.
Back office outsourcing companies by metro
- Back office outsourcing companies in Madrid29
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 back office outsourcing 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 back office outsourcing companies are there based in Spain?
RevenueBase identified 88 back office outsourcing 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?
Marktel, headquartered in Madrid, tops this list with the largest team on record.
Which city has the most back office outsourcing companies?
Madrid leads with 29 headquartered companies, followed by Barcelona (17) and Malaga (3).
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 237 verified decision-maker contacts tracked across these 88 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 14, 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.
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