Company lists · Data verified August 2026

Top 22 Back office outsourcing companies based in Spain

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 85 companies tracked

There are 85 back office outsourcing companies headquartered in Spain (RevenueBase, August 2026). RevenueBase tracks 3,351 professional contacts across them, including 225 with verified work emails and 18 with mobile numbers. 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. Data current as of August 28, 2026.

85Companies

3,351Contacts tracked

225Verified emails

18Mobile numbers

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The 22 largest back office outsourcing companies based in Spain

Ranked by team size

Top 22 of 85 back office outsourcing companies based in Spain, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Grupo BC	Barcelona	1,001-5,000	710	13
2	Diagonal Gest, SL	Madrid	501-1,000	419	40
3	Sellbytel Group Spain	Barcelona	5,001-10,000	308	32
4	Qipert	Madrid	501-1,000	279	34
5	GARSA	Madrid	501-1,000	200	32
6	Bukit BPO	Malaga	501-1,000	191	2
7	B-Kaind	San Sebastian	51-200	56	8
8	Gemini Recoveries & Collections	Madrid	201-500	51	3
9	Xentia Customer Services	Vigo	51-200	42	2
10	Nexia Solutions	Palma De Mallorca	11-50	40	6
11	BJS Legal Services	Barcelona	51-200	32	7
12	Grupo Base	Vigo	501-1,000	29	2
13	Informes Y Gestiones	n/a	11-50	17	3
14	AYC	Madrid	11-50	14	3
15	Interhanse Outsourcing Services	Malaga	11-50	13	4
16	Norgenic	Terrassa	1-10	5	4
17	Avantges	Barcelona	11-50	5	2
18	Gestionalia	Oviedo	1-10	5	1
19	Tabula Marketing. Gestión Administrativa	Mostoles	1-10	2	1
20	P.D.G. Executive Consultants S.L	Barcelona	1-10	2	1
21	Asemade	Santiago De Compostela	1-10	1	1
22	Diagonal Company Services & Solutions S	Barcelona	1-10	1	1

Showing 22 of 85 back office outsourcing companies based in Spain

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 225 reachable decision-makers.

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Back office outsourcing companies based in Spain at a glance

As of Aug 28, 2026

11-50Median size (employees)

MadridLargest hub · 26 HQs

18Contacts with mobile numbers

1Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Back office outsourcing companies by metro

Metro	Companies
Back office outsourcing companies in Madrid	26
Back office outsourcing companies in Barcelona	17
Back office outsourcing companies in Malaga	3
Back office outsourcing companies in Valencia	3
Back office outsourcing companies in Vigo	3
Back office outsourcing companies in Terrassa	2
Back office outsourcing companies in Tres Cantos	1

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “back office outsourcing companies”, with match quality audited by blind human judging, and headquartered in Spain.
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: Contact records re-verify on a rolling cadence; 1 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many back office outsourcing companies are there based in Spain?

There are 85 back office outsourcing companies headquartered in Spain as of August 2026 (RevenueBase).

What is the largest company on this list?

Grupo BC, headquartered in Barcelona, tops this list with the largest team on record.

Which city has the most back office outsourcing companies?

Madrid leads with 26 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 225 verified decision-maker contacts tracked across these 85 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.