Company lists · Data refreshed September 2026
Top 25 Outsourced administration services worldwide
RevenueBase identified 10,473 outsourced administration services worldwide as of September 2026 and tracks 104,250 professional contacts across them, including 19,683 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.
This list covers outsourced administration services worldwide, 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 21, 2026. Country and city lists for outsourced administration services follow the table.
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 outsourced administration services worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 10,725 contacts → | ||||
Partial evidence “We provide employee, financial and legal administration so that firms can invest and operate safely around the world.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 4,504 contacts → | ||||
Indirect evidence “Atuamos nos principais setores de terceirização, e somos pioneiros na implantação de contratos à distância.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 1,440 contacts → | ||||
Indirect evidence “Fundado em Dezembro de 2001, o Grupo MAP traz em seu DNA a arte de servir e o compromisso de manter seus clientes sempre satisfeitos.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 964 contacts → | ||||
Indirect evidence “Há mais de 40 anos no mercado de trabalho terceirizado, o Grupo Provac é uma empresa prestadora de serviços especializados, presente em mais de 130 cidades do Estado, com todo…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 921 contacts → | ||||
Partial evidence “IST Management Services, Inc is an outsourcing company specializing in the life cycle management of your information: From incoming mail, to complex print jobs, to eDiscovery and…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 6 | 879 contacts → | ||||
Indirect evidence “Started operation on 2004 with 25 employees, Currently iMarque has grown into a powerhouse of over professionals today, consistently achieving an impressive 40% average annual…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 693 contacts → | ||||
Indirect evidence “Prover Serviços Terceirizados com excelência, ética, transparência e com a melhor relação custo-benefício, agregando valor às empresas públicas e privadas e proporcionando…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 586 contacts → | ||||
Indirect evidence “CoAdvantage is now CoAd.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 9 | 558 contacts → | ||||
Indirect evidence “GSA National has been helping government contractors ensure compliance and streamline costs since 1991.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 557 contacts → | ||||
Indirect evidence “Brickwork India, a Women-owned Business Enterprise (WBE) and an ISO 27001: 2022 certified company, is the pioneer and leader in the Global Business Support Services.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 539 contacts → | ||||
Partial evidence “We are a proud and happy company that serves the outsourcing field with passion and commitment.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 517 contacts → | ||||
Indirect evidence “At Shore360, we do offshoring differently.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 13 | 494 contacts → | ||||
Indirect evidence “Desde 1998 no Brasil, o Grupo SRM é referência em terceirização de serviços, oferecendo serviços especializados, capazes de melhorar a performance operacional e financeira da…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 490 contacts → | ||||
Indirect evidence “OBM is a leading business process management company in UAE which provides client driven business management solutions.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 457 contacts → | ||||
Strong evidence “Amicassa Process Solutions, Inc.(AMICASSA), is a business process outsourcing company that provides after sales administration support to the Residential Business Group of Ayala…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 16 | 447 contacts → | ||||
Indirect evidence “Velan Info Services is a leading multidisciplinary service provider with its clients across the globe.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 17 | 415 contacts → | ||||
Indirect evidence “Escalon’s one stop shop approach gives you a single touch point for everything you need to keep your company safe.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 18 | 406 contacts → | ||||
Indirect evidence “BPO was founded by a group of professionals with decades of experience in the human resources sector and with the aim of providing complete and comprehensive answers to the needs…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 349 contacts → | ||||
Partial evidence “hammerjack is an Australian and Philippine-owned offshore outsourcing and Knowledge Process Outsourcing (KPO) provider.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 20 | 347 contacts → | ||||
Indirect evidence “Health India Insurance TPA Services Pvt.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 21 | 334 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 22 | 318 contacts → | ||||
Indirect evidence “SuperSeva Services, started in the year is an ISO 9001:2015 certified organization with a clear focus on providing Enterprise Support Services to its clients.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 311 contacts → | ||||
Partial evidence “GI Outsourcing is a UK-based accountants outsourcing firm.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 311 contacts → | ||||
Partial evidence “We are your outsourcing and advisory services provider for your business in the Caribbean region.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 310 contacts → | ||||
Partial evidence “BDO Solutions is a Business Services & Outsourcing company located in Mauritius and forms part of the international BDO network, which extends across 166 countries and…” Source: RevenueBase Database · checked Sep 21, 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: outsourced administration services. 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 outsourced administration services.
- Partial evidence
- Its own public description names part of outsourced administration services, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name outsourced administration services. 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 10,473 outsourced administration services worldwide
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Outsourced administration services worldwide at a glance
As of Sep 21, 2026Companies by employee count
Email recency is reported on each country list linked below.
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 outsourced administration services, 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.
- Coverage
- Every country. Country and city lists for outsourced administration services are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “outsourced administration services”. 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 outsourced administration services), 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 outsourced administration services, and records with no verified work email.
- 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, 19,683 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 21, 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.
Outsourced administration services by location
35 lists · largest firstEvery Outsourced administration services list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Outsourced administration services based in the United States1,380
- Outsourced administration services based in France982
- Outsourced administration services based in Brazil929
- Outsourced administration services based in the Netherlands781
- Outsourced administration services based in the United Kingdom540
- Outsourced administration services based in India401
- Outsourced administration services based in Italy310
- Outsourced administration services based in Spain271
- Outsourced administration services based in Australia263
- Outsourced administration services based in Switzerland187
- Outsourced administration services based in Belgium172
- Outsourced administration services based in South Africa172
- Outsourced administration services based in Canada171
- Outsourced administration services based in the Philippines149
- Outsourced administration services based in Germany125
- Outsourced administration services based in Poland101
- Outsourced administration services based in Colombia89
- Outsourced administration services based in Mexico86
- Outsourced administration services based in Portugal68
- Outsourced administration services based in Chile63
- Outsourced administration services based in Sweden61
- Outsourced administration services based in New Zealand56
- Outsourced administration services based in Denmark55
- Outsourced administration services based in Peru55
- Outsourced administration services based in the United Arab Emirates52
- Outsourced administration services based in Singapore39
- Outsourced administration services based in Israel37
- Outsourced administration services based in Finland27
- Outsourced administration services based in Ireland26
- Outsourced administration services based in Malaysia25
Cities
- Outsourced administration services based in Sao Paulo, Brazil166
- Outsourced administration services based in Ahmedabad, India45
- Outsourced administration services based in New York, United States42
- Outsourced administration services based in Houston, United States37
- Outsourced administration services based in Mumbai, India25
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 outsourced administration services, 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 outsourced administration services are there worldwide?
RevenueBase identified 10,473 outsourced administration services worldwide 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?
TMF Group, headquartered in Amsterdam, tops this list with the largest team on record.
Which country has the most outsourced administration services?
The United States leads with 1,380 companies, followed by France (982) and Brazil (929). Every outsourced administration services list by country and city is linked on this page.
Which city has the most outsourced administration services?
Sao Paulo leads with 166 headquartered companies, followed by London (90) and Paris (74).
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 19,683 verified decision-maker contacts tracked across these 10,473 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 21, 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.