Company lists · Data refreshed September 2026
Top 25 Accounting firm business process outsourcing companies based in Spain
RevenueBase identified 622 accounting firm business process outsourcing companies headquartered in Spain as of September 2026 and tracks 6,504 professional contacts across them, including 711 with verified work emails and 49 with mobile numbers. Madrid is the largest hub.
This list covers accounting firm business process 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 27, 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 accounting firm business process outsourcing companies based in Spain
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 977 contacts → | ||||
Indirect evidence “BDO es una de las mayores firmas globales de servicios profesionales.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 2 | 890 contacts → | ||||
Indirect evidence “En Grant Thornton España ayudamos a que tu empresa vaya más allá.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 3 | 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 27, 2026Thanks. The Data Team will review it. | |||||
| 4 | 278 contacts → | ||||
Partial 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 27, 2026Thanks. The Data Team will review it. | |||||
| 5 | 192 contacts → | ||||
Strong 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 27, 2026Thanks. The Data Team will review it. | |||||
| 6 | 176 contacts → | ||||
Indirect evidence “En Talenom te ofrecemos servicios de asesoría contable, laboral y legal para que gestiones tu empresa de manera integral y con la tranquilidad de tener a un equipo de expertos a…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 7 | 100 contacts → | ||||
Indirect evidence “Consulting & BPO Services Abinitio offers specialized management services to the customers to help them, from the beginning, to improve their businesses.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 8 | 75 contacts → | ||||
Indirect evidence “ECIJA Advisory es la unidad de negocio del Grupo ECIJA dirigida a resolver las necesidades de Financial Advisory, BPO y Public Sector de las empresas y las instituciones.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 9 | 74 contacts → | ||||
Indirect evidence “ASEC, has been a major player in professional circles in Spain for more than 35 years.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 10 | 56 contacts → | ||||
Partial 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 27, 2026Thanks. The Data Team will review it. | |||||
| 11 | 54 contacts → | ||||
Indirect evidence “Empresa de servicios profesionales especializada en auditoría, servicios de aseguramiento y consultoría.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 12 | 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 27, 2026Thanks. The Data Team will review it. | |||||
| 13 | 46 contacts → | ||||
Indirect evidence “GALÁN & ASOCIADOS CONSULTORES es una firma multidisciplinar especializada en Consultoría, Auditoría y Asesoría Fiscal, Mercantil, Laboral y Contable, que desde el año 1984 presta…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 14 | 43 contacts → | ||||
Partial evidence “o Advisory Group - Business Advisory Group Tax Accounting Employment Trade o Consultancy - Business Consultancy Viability plans Mergers and acquisitions Family business Strategic…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 15 | 42 contacts → | ||||
Partial 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 27, 2026Thanks. The Data Team will review it. | |||||
| 16 | 41 contacts → | ||||
Indirect evidence “VIR AUDIT es una firma multidisciplinar que presta servicios de auditoría, consultoría y finanzas corporativas ofreciendo una amplia gama de servicios profesionales en estos…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 17 | 38 contacts → | ||||
Indirect evidence “Fundada en 1990.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 18 | 34 contacts → | ||||
Indirect evidence “ABA Consultores y Auditores de Cuentas se constituye para asesorar y representar a nuestros clientes, con la mayor eficiencia y agilidad en las áreas de Auditoría de Cuentas…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 19 | 27 contacts → | ||||
Indirect evidence “Munt Audit & Forensic es una firma de servicios profesionales, con presencia en España y Andorra, que cuenta con una larga trayectoria profesional en el Sector de Forensic…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 20 | 26 contacts → | ||||
Indirect evidence “Auditores, Consultores y Expertos Independientes S.L.P.(Audicon) es una empresa que surge en el año como resultado de la unión de una serie de profesionales con gran experiencia…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 21 | 23 contacts → | ||||
Indirect evidence “En FINOUT trabajamos para nuestros clientes como si fuéramos su departamento financiero-administrativo externo.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 22 | 22 contacts → | ||||
Indirect evidence “En Audiconsulting te ofrecemos máxima calidad, amplia experiencia y la confianza de una respuesta inmediata.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 23 | 22 contacts → | ||||
Indirect evidence “The company We are a professional services firm founded in 1984 which aims to provide an efficient service backed by the expertise of its members.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 24 | 22 contacts → | ||||
Indirect evidence “Netadia Europa es una firma de auditoría que se identifica con el rigor de un servicio excelente y la cercanía de entender a nuestros clientes.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 25 | 20 contacts → | ||||
Indirect evidence “GCE Group is a professional company that offers a whole counsel service to enterprises of our country, adding value to the activities of our clients through our professional…” Source: RevenueBase Database · checked Sep 27, 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: accounting firm business process 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 accounting firm business process outsourcing companies.
- Partial evidence
- Its own public description names part of accounting firm business process outsourcing companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name accounting firm business process 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 622 accounting firm business process outsourcing companies based in Spain
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Accounting firm business process outsourcing companies based in Spain at a glance
As of Sep 27, 2026Companies by employee count
Freshness & accuracy
How recently the business emails were verified and the company information checked
Email last verified
Median 29.0dCompany record updated
Median 83.0dHow 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 accounting firm business process 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 “accounting firm business process 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 accounting firm business process 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 accounting firm business process 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, 711 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 27, 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.
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 accounting firm business process 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 accounting firm business process outsourcing companies are there based in Spain?
RevenueBase identified 622 accounting firm business process 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?
BDO Spain, headquartered in Madrid, tops this list with the largest team on record.
Which city has the most accounting firm business process outsourcing companies?
Madrid leads with 119 headquartered companies, followed by Barcelona (85) and Malaga (23).
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 711 verified decision-maker contacts tracked across these 622 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 27, 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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