Company lists · Data refreshed September 2026

Top 25 Outsourced administrative support companies worldwide

Name: Outsourced administrative support companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 17,590 companies tracked

RevenueBase identified 17,590 outsourced administrative support companies worldwide as of September 2026 and tracks 138,470 professional contacts across them, including 13,997 with verified work emails. The United States is the largest market and London the largest hub.

This list covers outsourced administrative support companies 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 20, 2026. Country and city lists for outsourced administrative support companies 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

17,590Companies

138,470Contacts tracked

13,997Verified emails

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The 25 largest outsourced administrative support companies worldwide

Ranked by team size

Top 25 of 17,590 outsourced administrative support companies worldwide, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to outsourced administrative support 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	Information Evolution, INC	Partial evidence	Austin, TX, United StatesHQ checked Sep 20, 2026	501-1,000	1,238 contacts →
	Partial evidence “We are a boutique outsourcing firm specializing in keeping our customers' databases up-to-date, accurate, and as robust as possible.” Source: RevenueBase Database · checked Sep 20, 2026
2	BELAY	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 20, 2026	201-500	1,074 contacts →
	Indirect evidence “At BELAY, we help leaders accomplish more and juggle less by connecting them with exceptional, U.S-based Executive Assistants and Financial Experts through personalized, flexible…” Source: RevenueBase Database · checked Sep 20, 2026
3	Invensis	Indirect evidence	Bangalore, IndiaHQ checked Sep 20, 2026	1,001-5,000	995 contacts →
	Indirect evidence “At Invensis, we solve business inefficiencies.” Source: RevenueBase Database · checked Sep 20, 2026
4	Grupo Provac	Indirect evidence	Araraquara, BrazilHQ checked Sep 20, 2026	5,001-10,000	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 20, 2026
5	Wing Assistant	Indirect evidence	Berkeley, CA, United StatesHQ checked Sep 20, 2026	1,001-5,000	946 contacts →
	Indirect evidence “Wing provides small businesses, startups, execs, and enterprises with the top 1% of remote talent to take over recurring work such as Social Media Management, Executive…” Source: RevenueBase Database · checked Sep 20, 2026
6	Remote Helpers	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	201-500	816 contacts →
	Indirect evidence “Hiring from us you receive a dedicated English speaking Virtual Assistants for Full/Part Time!” Source: RevenueBase Database · checked Sep 20, 2026
7	Sourcefit	Indirect evidence	Quezon City, PhilippinesHQ checked Sep 20, 2026	1,001-5,000	813 contacts →
	Indirect evidence “Sourcefit is focused on providing custom offshore solutions.” Source: RevenueBase Database · checked Sep 20, 2026
8	Osesp Serviços	Indirect evidence	Sao Paulo, BrazilHQ checked Sep 20, 2026	10001+	810 contacts →
	Indirect evidence “Somos excelência em serviços terceirizados.” Source: RevenueBase Database · checked Sep 20, 2026
9	Prialto	Indirect evidence	Portland, OR, United StatesHQ checked Sep 20, 2026	201-500	703 contacts →
	Indirect evidence “At Prialto, we exist to Amplify People, from every executive who uses our service to every employee who delivers it.” Source: RevenueBase Database · checked Sep 20, 2026
10	DBP Service Corporation	Partial evidence	Makati City, PhilippinesHQ checked Sep 20, 2026	10001+	697 contacts →
	Partial evidence “The DBP Service Corporation is an outsource company The company is guided and ran by a Board and Management Team, consisting of former and present Officers of the Development Bank…” Source: RevenueBase Database · checked Sep 20, 2026
11	Not Available	Indirect evidence	Na, United StatesHQ checked Sep 20, 2026	n/a	658 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
12	Brickwork India	Partial evidence	Bangalore, IndiaHQ checked Sep 20, 2026	201-500	557 contacts →
	Partial 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 20, 2026
13	IBS	Partial evidence	New Maadi, EgyptHQ checked Sep 20, 2026	10001+	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 20, 2026
14	Transegur Vigilância E Segurança	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 20, 2026	1,001-5,000	535 contacts →
	Indirect evidence “Somos especialistas em terceirização de serviços de apoio ao seu negócio.” Source: RevenueBase Database · checked Sep 20, 2026
15	Grupo SRM	Indirect evidence	Barueri, BrazilHQ checked Sep 20, 2026	1,001-5,000	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 20, 2026
16	Amicassa Process Solutions, INC	Strong evidence	Makati City, PhilippinesHQ checked Sep 20, 2026	201-500	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 20, 2026
17	Velan Info Services	Indirect evidence	Dover, DE, United StatesHQ checked Sep 20, 2026	201-500	447 contacts →
	Indirect evidence “Velan Info Services is a leading multidisciplinary service provider with its clients across the globe.” Source: RevenueBase Database · checked Sep 20, 2026
18	Pineapple Virtual Assistant Agency	Indirect evidence	Sierra Vista, AZ, United StatesHQ checked Sep 20, 2026	n/a	429 contacts →
	Indirect evidence “Pineapple is a Virtual Assistant company that offers trained Virtual Assistants specializing in many industries such as: law, multimedia, healthcare, e-commerce, and other small…” Source: RevenueBase Database · checked Sep 20, 2026
19	Escalon Business Services, India	Indirect evidence	Mohali, IndiaHQ checked Sep 20, 2026	201-500	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 20, 2026
20	BPO	Indirect evidence	Venezia, ItalyHQ checked Sep 20, 2026	n/a	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 20, 2026
21	Sellbytel Group	Partial evidence	Nuremberg, GermanyHQ checked Sep 20, 2026	5,001-10,000	359 contacts →
	Partial evidence “The SELLBYTEL Group is one of the worldwide leading outsourcing specialists and part of Webhelp.” Source: RevenueBase Database · checked Sep 20, 2026
22	Hammerjack	Partial evidence	Sydney, AustraliaHQ checked Sep 20, 2026	501-1,000	349 contacts →
	Partial evidence “hammerjack is an Australian and Philippine-owned offshore outsourcing and Knowledge Process Outsourcing (KPO) provider.” Source: RevenueBase Database · checked Sep 20, 2026
23	Limpservice Serviços	Indirect evidence	Serra, BrazilHQ checked Sep 20, 2026	1,001-5,000	341 contacts →
	Indirect evidence “22 Anos atuando no mercado Capixaba e Nacional, fornecendo Mão de Obra Terceirizada para Grandes Empresas e Órgãos Públicos e Condomínios- Limpeza e Conservação - Porteiro / Ronda…” Source: RevenueBase Database · checked Sep 20, 2026
24	Transact Global	Strong evidence	Bangalore, IndiaHQ checked Sep 20, 2026	1,001-5,000	340 contacts →
	Strong evidence “We specialize in end-to-end outsourcing across all industries and functions, including: Customer Support & Call Center Inbound/outbound call handling, technical support, live…” Source: RevenueBase Database · checked Sep 20, 2026
25	Adlim-Terceirizacao EM Servicos	Indirect evidence	Bezerros, BrazilHQ checked Sep 20, 2026	1,001-5,000	334 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 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: outsourced administrative support 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 outsourced administrative support companies.
Partial evidence: Its own public description names part of outsourced administrative support companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name outsourced administrative support 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 17,590 outsourced administrative support companies worldwide

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Outsourced administrative support companies worldwide at a glance

As of Sep 20, 2026

10.1%Verified-email coverage

7.9Average contacts per company

1-10Median size (employees)

1.8%Largest-city concentration · London

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

12,783

11-50

3,081

51-200

1,087

201-500

362

501-1,000

108

1,001-5,000

5,001-10,000

10001+

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 administrative support 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.
Coverage: Every country. Country and city lists for outsourced administrative support companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “outsourced administrative support 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 outsourced administrative support 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 outsourced administrative support companies, 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, 13,997 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 20, 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 administrative support companies by location

50 lists · largest first

Every Outsourced administrative support companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 administrative support 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 outsourced administrative support companies are there worldwide?

RevenueBase identified 17,590 outsourced administrative support companies 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?

Information Evolution, INC, headquartered in Austin, tops this list with the largest team on record.

Which country has the most outsourced administrative support companies?

The United States leads with 2,822 companies, followed by the United Kingdom (1,607) and France (1,430). Every outsourced administrative support companies list by country and city is linked on this page.

Which city has the most outsourced administrative support companies?

London leads with 322 headquartered companies, followed by Sao Paulo (161) and Manila (116).

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 13,997 verified decision-maker contacts tracked across these 17,590 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 20, 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.