Company lists · Data refreshed September 2026

Top 25 Accounting and outsourcing companies based in Spain

Name: Accounting and outsourcing companies based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 1,158 companies tracked

RevenueBase identified 1,158 accounting and outsourcing companies headquartered in Spain as of September 2026 and tracks 9,677 professional contacts across them, including 1,021 with verified work emails and 79 with mobile numbers. Madrid is the largest hub.

This list covers accounting and 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 22, 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 22, 2026 86% judged on-target in blind review

1,158Companies

9,677Contacts tracked

1,021Verified emails

79Mobile numbers

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The 25 largest accounting and outsourcing companies based in Spain

Ranked by team size

Top 25 of 1,158 accounting and outsourcing companies based in Spain, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to accounting and outsourcing 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	Grant Thornton España	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	501-1,000	890 contacts →
	Indirect evidence “En Grant Thornton España ayudamos a que tu empresa vaya más allá.” Source: RevenueBase Database · checked Sep 22, 2026
2	Cibergestión	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	1,001-5,000	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 22, 2026
3	Diagonal Gest, SL	Indirect evidence	Barcelona, SpainHQ checked Sep 22, 2026	501-1,000	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 22, 2026
4	Qipert	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	501-1,000	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 22, 2026
5	TAX Economistas Y Abogados	Indirect evidence	Figueres, SpainHQ checked Sep 22, 2026	201-500	233 contacts →
	Indirect evidence “TAX Economistas y Abogados es un grupo con 50 asesorías de empresa, con más de 35 años de experiencia en el sector y 300 profesionales.” Source: RevenueBase Database · checked Sep 22, 2026
6	GARSA	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	501-1,000	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 22, 2026
7	Talenom España	Indirect evidence	Barcelona, SpainHQ checked Sep 22, 2026	201-500	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 22, 2026
8	Avincla	Indirect evidence	Barcelona, SpainHQ checked Sep 22, 2026	201-500	123 contacts →
	Indirect evidence “Somos AVINCLA, una firma independiente de servicios profesionales, comprometidos con ofrecer soluciones ágiles y personalizadas para ayudar a nuestros clientes a impulsar su…” Source: RevenueBase Database · checked Sep 22, 2026
9	Diagonal Company Services & Solutions S.L	Indirect evidence	Barcelona, SpainHQ checked Sep 22, 2026	1,001-5,000	116 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
10	UHY FAY & CO Spain	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	5,001-10,000	109 contacts →
	Indirect evidence “UHY Fay & Co offers multidisciplinary services that include: Audit, Legal, Tax and Labour Advisory, Internationalization of Businesses, Corporate Finance, Consultancy, and…” Source: RevenueBase Database · checked Sep 22, 2026
11	Vilar Riba	Indirect evidence	Vic, SpainHQ checked Sep 22, 2026	51-200	101 contacts →
	Indirect evidence “VILAR RIBA is a business group created and structured to offer full advice, both to companies and individuals, in any field of professional services: • Tax advice • Legal advice •…” Source: RevenueBase Database · checked Sep 22, 2026
12	JDA Sfai	Indirect evidence	Barcelona, SpainHQ checked Sep 22, 2026	51-200	88 contacts →
	Indirect evidence “JDA es un grupo de empresas orientadas a la prestación de servicios profesionales, con asentamiento en la provincia de Barcelona.” Source: RevenueBase Database · checked Sep 22, 2026
13	Nortex	Indirect evidence	A Coruña, SpainHQ checked Sep 22, 2026	201-500	88 contacts →
	Indirect evidence “Especialistas en externalización de procesos logísticos, industriales y hoteleros.” Source: RevenueBase Database · checked Sep 22, 2026
14	E Advisory	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	11-50	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 22, 2026
15	Asec Asesores S.L	Indirect evidence	Marbella, SpainHQ checked Sep 22, 2026	11-50	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 22, 2026
16	Grupo Gestiona-T	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	51-200	66 contacts →
	Indirect evidence “Grupo Gestiona-t is a full-service platform that provides management support to investors, law firms, companies and individuals.” Source: RevenueBase Database · checked Sep 22, 2026
17	B-Kaind	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	51-200	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 22, 2026
18	Activa Auditoria & Consultoria	Indirect evidence	Barcelona, SpainHQ checked Sep 22, 2026	11-50	54 contacts →
	Indirect evidence “Empresa de servicios profesionales especializada en auditoría, servicios de aseguramiento y consultoría.” Source: RevenueBase Database · checked Sep 22, 2026
19	Ponter	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	51-200	51 contacts →
	Indirect evidence “En Ponter te damos cobertura total para que no tengas que ir a ningún otro sitio.” Source: RevenueBase Database · checked Sep 22, 2026
20	Galán Asociados	Indirect evidence	Alicante, SpainHQ checked Sep 22, 2026	51-200	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 22, 2026
21	Bcndata	Indirect evidence	Barcelona, SpainHQ checked Sep 22, 2026	51-200	45 contacts →
	Indirect evidence “BCNDATA es la Consultora líder de externalización de procesos administrativos y legales para Aseguradoras y Reaseguradoras.” Source: RevenueBase Database · checked Sep 22, 2026
22	RBH Global	Indirect evidence	León, SpainHQ checked Sep 22, 2026	51-200	44 contacts →
	Indirect evidence “Comprehensive advice for companies, self-employed people, individuals and other organizations.” Source: RevenueBase Database · checked Sep 22, 2026
23	Ges-Start	Indirect evidence	Barcelona, SpainHQ checked Sep 22, 2026	51-200	44 contacts →
	Indirect evidence “Ges-Start responde a todas las necesidades en el ámbito de la asesoría contable, fiscal y laboral.” Source: RevenueBase Database · checked Sep 22, 2026
24	Arnal Asesores	Indirect evidence	Barcelona, SpainHQ checked Sep 22, 2026	201-500	44 contacts →
	Indirect evidence “Arnal somos un grupo de empresas dedicadas al sector de los Servicios Profesionales que trabaja por todo el territorio nacional mediante una amplia red de oficinas y delegaciones…” Source: RevenueBase Database · checked Sep 22, 2026
25	Ayce Laborytax 42 Años Acompañando Empresas	Partial evidence	Madrid, SpainHQ checked Sep 22, 2026	51-200	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 22, 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: accounting and 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 and outsourcing companies.
Partial evidence: Its own public description names part of accounting and 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 and 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 1,158 accounting and outsourcing companies based in Spain

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Accounting and outsourcing companies based in Spain at a glance

As of Sep 22, 2026

10.6%Verified-email coverage

0.8%Mobile-number coverage

8.4Average contacts per company

1-10Median size (employees)

18.9%Largest-city concentration · Madrid

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

786

11-50

293

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 24.0d

7720–30

23531–60

1161–90

190–180

2180+

Company record updated

Median 87.0d

00–30

1,91631–60

4,78561–90

2,59590–180

381180+

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 accounting and 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 and 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 and 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 and 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, 1,021 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 22, 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.

Accounting and outsourcing companies by metro

Accounting and outsourcing companies in Madrid219
Accounting and outsourcing companies in Barcelona137
Accounting and outsourcing companies in Valencia34
Accounting and outsourcing companies in Sevilla29
Accounting and outsourcing companies in Malaga26

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 and 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 and outsourcing companies are there based in Spain?

RevenueBase identified 1,158 accounting and 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?

Grant Thornton España, headquartered in Madrid, tops this list with the largest team on record.

Which city has the most accounting and outsourcing companies?

Madrid leads with 219 headquartered companies, followed by Barcelona (137) and Valencia (34).

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 1,021 verified decision-maker contacts tracked across these 1,158 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 22, 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.