Company lists · Data refreshed September 2026

Top 25 Professional outsourcing services worldwide

Name: Professional outsourcing services worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 21,514 companies tracked

RevenueBase identified 21,514 professional outsourcing services worldwide as of September 2026 and tracks 447,004 professional contacts across them, including 43,262 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers professional outsourcing 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 professional outsourcing 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 21, 2026 86% judged on-target in blind review

21,514Companies

447,004Contacts tracked

43,262Verified emails

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The 25 largest professional outsourcing services worldwide

Ranked by team size

Top 25 of 21,514 professional outsourcing services worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to professional outsourcing services: 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	Capita	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	10001+	20,824 contacts →
	Indirect evidence “Capita is an outsourcer, helping clients across the public and private sectors run complex business processes more efficiently, creating better consumer experiences.” Source: RevenueBase Database · checked Sep 21, 2026
2	Ienergizer	Partial evidence	Noida, IndiaHQ checked Sep 21, 2026	10001+	14,745 contacts →
	Partial evidence “iEnergizer is a leading Business Process Outsourcing provider (“BPO”) of customer management solutions dedicated to delivering performance while actively supporting and advocating…” Source: RevenueBase Database · checked Sep 21, 2026
3	Intelcia	Partial evidence	Casablanca, MoroccoHQ checked Sep 21, 2026	10001+	13,214 contacts →
	Partial evidence “Intelcia is a global player in outsourcing, which has supported its clients for 20 years combining talents, technologies, and processes to offer a tailor-made service and skills…” Source: RevenueBase Database · checked Sep 21, 2026
4	Eficacia	Indirect evidence	Cali, ColombiaHQ checked Sep 21, 2026	10001+	4,692 contacts →
	Indirect evidence “Incrementamos la productividad y eficiencia de nuestros clientes- Más de 40 años de experiencia en el mercado- Líderes en Soluciones de Mercadeo, Trade Marketing, Ventas y Gestión…” Source: RevenueBase Database · checked Sep 21, 2026
5	Liderança Serviços	Indirect evidence	São José, BrazilHQ checked Sep 21, 2026	10001+	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, 2026
6	TOA Global	Indirect evidence	Southport, AustraliaHQ checked Sep 21, 2026	1,001-5,000	3,912 contacts →
	Indirect evidence “Don’t wait until understaffing eats away at your productivity and client satisfaction.” Source: RevenueBase Database · checked Sep 21, 2026
7	GSS Global Sales Solutions	Indirect evidence	Madrid, SpainHQ checked Sep 21, 2026	10001+	3,716 contacts →
	Indirect evidence “is a tech company specialized in providing, and for.” Source: RevenueBase Database · checked Sep 21, 2026
8	Plansul	Indirect evidence	Florianópolis, BrazilHQ checked Sep 21, 2026	10001+	3,097 contacts →
	Indirect evidence “A Plansul é referência nacional em serviços terceirizados há mais de 40 anos, oferecendo soluções completas em Facilities e Contact Center para empresas públicas e privadas.” Source: RevenueBase Database · checked Sep 21, 2026
9	Advanced Call Center Technologies, LLC	Indirect evidence	Berwyn, PA, United StatesHQ checked Sep 21, 2026	5,001-10,000	2,774 contacts →
	Indirect evidence “Advanced Call Center Technologies, LLC (ACT) is a premier provider of domestic (USA), near shore and far shore outsourced call center services to the financial services, mortgage…” Source: RevenueBase Database · checked Sep 21, 2026
10	Stream Global Services	Indirect evidence	Eagan, MN, United StatesHQ checked Sep 21, 2026	10001+	2,772 contacts →
	Indirect evidence “Stream Global Services is a premium business process outsource (BPO) service provider specializing in customer relationship management solutions including sales, customer care…” Source: RevenueBase Database · checked Sep 21, 2026
11	Expert Global Solutions NOW Alorica	Indirect evidence	United StatesHQ checked Sep 21, 2026	10001+	2,388 contacts →
	Indirect evidence “Expert Global Solutions is now part of Alorica.” Source: RevenueBase Database · checked Sep 21, 2026
12	Enshored	Indirect evidence	Signal Hill, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,247 contacts →
	Indirect evidence “Enshored powers the growth of ambitious high growth companies by delivering and managing teams of elite outsourcers.” Source: RevenueBase Database · checked Sep 21, 2026
13	PT Danamas Insan Kreasi Andalan Dika	Partial evidence	Jakarta Pusat, IndonesiaHQ checked Sep 21, 2026	1,001-5,000	2,036 contacts →
	Partial evidence “PT Danamas Insan Kreasi Andalan (DIKA) adalah solusi outsourcing terpercaya untuk membantu bisnis Anda tumbuh lebih cepat dan efisien.” Source: RevenueBase Database · checked Sep 21, 2026
14	Covalen	Indirect evidence	Dublin 4, IrelandHQ checked Sep 21, 2026	1,001-5,000	2,020 contacts →
	Indirect evidence “Hello.” Source: RevenueBase Database · checked Sep 21, 2026
15	Allied Global	Indirect evidence	GuatemalaHQ checked Sep 21, 2026	5,001-10,000	1,979 contacts →
	Indirect evidence “Regardless of your Company’s size (from Start-ups to Fortune 500), business vertical or service requirements, we act as a seamless extension of your team to help you grow, and…” Source: RevenueBase Database · checked Sep 21, 2026
16	Gear INC	Partial evidence	SingaporeHQ checked Sep 21, 2026	5,001-10,000	1,974 contacts →
	Partial evidence “Empowering Global Brands Through Custom BPO Solutions Gear Inc delivers business process outsourcing solutions designed to meet the unique challenges of leading enterprises.” Source: RevenueBase Database · checked Sep 21, 2026
17	Nova RIO	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 21, 2026	1,001-5,000	1,895 contacts →
	Indirect evidence “A Nova Rio é uma empresa líder em multiplicidade de serviços, porque oferece um mundo de opções em terceirização para a sua empresa.” Source: RevenueBase Database · checked Sep 21, 2026
18	Capita India	Indirect evidence	Mumbai, IndiaHQ checked Sep 21, 2026	5,001-10,000	1,757 contacts →
	Indirect evidence “Established in 2004, Capita India is part of Capita plc, the UK's No.” Source: RevenueBase Database · checked Sep 21, 2026
19	Calibehr Business Support Services Pvt. LTD	Indirect evidence	Navi Mumbai, IndiaHQ checked Sep 21, 2026	10001+	1,725 contacts →
	Indirect evidence “Calibehr is a strategic business solutions provider company that offers end-to-end solutions to organizations for sustainable growth.” Source: RevenueBase Database · checked Sep 21, 2026
20	Support Services Group	Indirect evidence	Waco, TX, United StatesHQ checked Sep 21, 2026	5,001-10,000	1,710 contacts →
	Indirect evidence “Support Services Group (SSG) helps businesses accelerate growth and earn customers for life through high-touch, outsourced engagement center services.” Source: RevenueBase Database · checked Sep 21, 2026
21	Emagine	Indirect evidence	Copenhagen, DenmarkHQ checked Sep 21, 2026	1,001-5,000	1,636 contacts →
	Indirect evidence “emagine is a high-end business & IT consulting company challenging the way businesses leverage high-end expertise.” Source: RevenueBase Database · checked Sep 21, 2026
22	Befree	Indirect evidence	Parramatta, AustraliaHQ checked Sep 21, 2026	1,001-5,000	1,626 contacts →
	Indirect evidence “Befree is a global financial services provider headquartered in Sydney with a strong presence across Australia, the UK, the US, and India.” Source: RevenueBase Database · checked Sep 21, 2026
23	Sybrid Private Limited	Indirect evidence	Karachi, PakistanHQ checked Sep 21, 2026	1,001-5,000	1,609 contacts →
	Indirect evidence “Sybrid (Pvt) Ltd is Pakistan's leading technology solutions provider, helping businesses optimize their operations and drive growth.” Source: RevenueBase Database · checked Sep 21, 2026
24	RDI Corporation	Indirect evidence	Cincinnati, OH, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,484 contacts →
	Indirect evidence “At RDI, we believe in winning smart by providing customized, strategic solutions to our clients.” Source: RevenueBase Database · checked Sep 21, 2026
25	Grupo Mazzini Administracao E Empreitas	Indirect evidence	Vila Mariana, BrazilHQ checked Sep 21, 2026	1,001-5,000	1,455 contacts →
	Indirect evidence “Fundado em 1981, o Grupo Mazzini se destaca pela especialização na prestação e gestão de serviços terceirizados, mão de obra temporária, trade marketing, facilities e unidades de…” Source: RevenueBase Database · checked Sep 21, 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: professional outsourcing 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 professional outsourcing services.
Partial evidence: Its own public description names part of professional outsourcing services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name professional outsourcing 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 21,514 professional outsourcing services worldwide

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Professional outsourcing services worldwide at a glance

As of Sep 21, 2026

9.7%Verified-email coverage

20.8Average contacts per company

11-50Median size (employees)

2.0%Largest-city concentration · Sao Paulo

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

10,199

11-50

6,360

51-200

2,865

201-500

1,057

501-1,000

444

1,001-5,000

375

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 professional outsourcing 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 professional outsourcing services are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “professional outsourcing 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 professional outsourcing 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 professional outsourcing 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, 43,262 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.

Professional outsourcing services by location

87 lists · largest first

Every Professional outsourcing services 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 professional outsourcing 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 professional outsourcing services are there worldwide?

RevenueBase identified 21,514 professional outsourcing 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?

Capita, headquartered in London, tops this list with the largest team on record.

Which country has the most professional outsourcing services?

The United States leads with 2,255 companies, followed by India (2,198) and Brazil (1,933). Every professional outsourcing services list by country and city is linked on this page.

Which city has the most professional outsourcing services?

Sao Paulo leads with 422 headquartered companies, followed by London (235) and Lahore (225).

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 43,262 verified decision-maker contacts tracked across these 21,514 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.