Company lists · Data refreshed September 2026

Top 25 IT outsourcing services worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 24,285 companies tracked

RevenueBase identified 24,285 IT outsourcing services worldwide as of September 2026 and tracks 552,317 professional contacts across them, including 117,642 with verified work emails and 42,376 with mobile numbers. The United States is the largest market and London the largest hub.

This list covers IT 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 27, 2026. Country and city lists for IT 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 27, 2026 86% judged on-target in blind review

24,285Companies

552,317Contacts tracked

117,642Verified emails

42,376Mobile numbers

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The 25 largest IT outsourcing services worldwide

Ranked by team size

Top 25 of 24,285 IT outsourcing services worldwide, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to IT 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 27, 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 27, 2026
2	Infinite Computer Solutions	Indirect evidence	Rockville, MD, United StatesHQ checked Sep 27, 2026	10001+	12,891 contacts →
	Indirect evidence “Infinite is a.” Source: RevenueBase Database · checked Sep 27, 2026
3	Apex Systems	Indirect evidence	Glen Allen, VA, United StatesHQ checked Sep 27, 2026	1,001-5,000	12,231 contacts →
	Indirect evidence “Everforth Apex Systems, part of the Everforth ™ Network, is a leading global technology services company specializing in customizable industry-specific solutions that turns…” Source: RevenueBase Database · checked Sep 27, 2026
4	HTC Global Services	Indirect evidence	Troy, MI, United StatesHQ checked Sep 27, 2026	10001+	8,866 contacts →
	Indirect evidence “HTC Global Services Inc, founded in 1990, headquartered in Troy, Michigan, is a global provider of Information Technology and Business Process Services and Solutions.” Source: RevenueBase Database · checked Sep 27, 2026
5	Logica	Strong evidence	Montreal, QC, CanadaHQ checked Sep 27, 2026	10001+	7,416 contacts →
	Strong evidence “Logica is now part of CGI, a global IT and business process services provider delivering business consulting, systems integration and outsourcing services.” Source: RevenueBase Database · checked Sep 27, 2026
6	Atos Syntel	Indirect evidence	Troy, MI, United StatesHQ checked Sep 27, 2026	10001+	7,339 contacts →
	Indirect evidence “Atos\|Syntel is a leading global provider of integrated information technology and knowledge process services.” Source: RevenueBase Database · checked Sep 27, 2026
7	Adesso SE	Indirect evidence	Dortmund, GermanyHQ checked Sep 27, 2026	5,001-10,000	5,332 contacts →
	Indirect evidence “The future belongs to companies that effectively translate agentic AI into value creation.” Source: RevenueBase Database · checked Sep 27, 2026
8	Matrix	Indirect evidence	Kfar Saba, IsraelHQ checked Sep 27, 2026	10001+	4,980 contacts →
	Indirect evidence “matrix is the leading technology services company, employing over professionals worldwide.” Source: RevenueBase Database · checked Sep 27, 2026
9	CGS Computer Generated Solutions	Indirect evidence	New York, NY, United StatesHQ checked Sep 27, 2026	5,001-10,000	4,608 contacts →
	Indirect evidence “For over 40 years, CGS has enabled global enterprises, regional companies, and government agencies to drive breakthrough performance through business applications, enterprise…” Source: RevenueBase Database · checked Sep 27, 2026
10	Liderança Serviços	Indirect evidence	São José, BrazilHQ checked Sep 27, 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 27, 2026
11	Atos IT Solutions And Services A S	Partial evidence	Taastrup, DenmarkHQ checked Sep 27, 2026	n/a	3,655 contacts →
	Partial evidence “Atos er en international IT-serviceleverandør med en årlig omsætning i 2012 på 8.8 milliarder EUR og 76.400 medarbejdere i 47 lande.” Source: RevenueBase Database · checked Sep 27, 2026
12	Visionet Systems INC	Indirect evidence	Cranbury, NJ, United StatesHQ checked Sep 27, 2026	10001+	3,119 contacts →
	Indirect evidence “Visionet is a premier digital technology solutions company built on the premise of disruptive innovation.” Source: RevenueBase Database · checked Sep 27, 2026
13	Nityo Infotech	Indirect evidence	Plainsboro, NJ, United StatesHQ checked Sep 27, 2026	10001+	3,001 contacts →
	Indirect evidence “Nityo Infotech (Nityo) is a Global Technology Solutions and Services organisation.” Source: RevenueBase Database · checked Sep 27, 2026
14	Altron Digital Business	Partial evidence	Johannesburg, South AfricaHQ checked Sep 27, 2026	1,001-5,000	2,877 contacts →
	Partial evidence “Operate, optimise, and transform with the IT services company that offers the enterprise-grade solutions needed to grow your business.” Source: RevenueBase Database · checked Sep 27, 2026
15	Milestone Technologies, INC	Partial evidence	Fremont, CA, United StatesHQ checked Sep 27, 2026	1,001-5,000	2,698 contacts →
	Partial evidence “Milestone Technologies is a global IT Services and Digital Solutions company based in Silicon Valley that helps hundreds of leading corporations deliver technology around the…” Source: RevenueBase Database · checked Sep 27, 2026
16	Flatworld Solutions	Indirect evidence	Princeton, NJ, United StatesHQ checked Sep 27, 2026	1,001-5,000	2,494 contacts →
	Indirect evidence “Flatworld Solutions is a diversified BPO and Technology services company with customers across 100+ countries.” Source: RevenueBase Database · checked Sep 27, 2026
17	Simpress	Partial evidence	Sao Paulo, BrazilHQ checked Sep 27, 2026	1,001-5,000	2,414 contacts →
	Partial evidence “Há mais de 20 anos, tornamos a vida do nosso cliente mais fácil, com soluções em outsourcing de equipamentos de TI que oferecem uma rotina mais estratégica e sustentável para as…” Source: RevenueBase Database · checked Sep 27, 2026
18	CTIS	Indirect evidence	Barueri, BrazilHQ checked Sep 27, 2026	5,001-10,000	2,347 contacts →
	Indirect evidence “CTIS, a SONDA Group company, is recognized as one of the largest and most important Brazilian information technology companies.” Source: RevenueBase Database · checked Sep 27, 2026
19	Astreya	Partial evidence	San Jose, CA, United StatesHQ checked Sep 27, 2026	1,001-5,000	2,215 contacts →
	Partial evidence “Astreya is the leading IT solutions provider for some of the world's most recognizable and innovative organizations.” Source: RevenueBase Database · checked Sep 27, 2026
20	Covalen	Indirect evidence	Dublin 4, IrelandHQ checked Sep 27, 2026	1,001-5,000	2,020 contacts →
	Indirect evidence “Hello.” Source: RevenueBase Database · checked Sep 27, 2026
21	Alten Spain	Indirect evidence	Madrid, SpainHQ checked Sep 27, 2026	1,001-5,000	1,958 contacts →
	Indirect evidence “ALTEN es una multinacional europea especializada en proporcionar servicios de consultoría, tecnologías de la información y servicios de ingeniería a las principales compañías del…” Source: RevenueBase Database · checked Sep 27, 2026
22	Nova RIO	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 27, 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 27, 2026
23	SLK Global Solutions	Indirect evidence	TX, United StatesHQ checked Sep 27, 2026	10001+	1,743 contacts →
	Indirect evidence “Coforge Business Process Solutions (or Coforge BPS) offers digital platforms and solutions to multiple industries, including the financial services industry.” Source: RevenueBase Database · checked Sep 27, 2026
24	Infovision INC	Partial evidence	Richardson, TX, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,728 contacts →
	Partial evidence “Infovision, founded in 1995, is a leading global IT services company offering enterprise digital transformation and modernization solutions across business verticals.” Source: RevenueBase Database · checked Sep 27, 2026
25	Emagine	Partial evidence	Copenhagen, DenmarkHQ checked Sep 27, 2026	1,001-5,000	1,636 contacts →
	Partial evidence “emagine is a high-end business & IT consulting company challenging the way businesses leverage high-end expertise.” Source: RevenueBase Database · checked Sep 27, 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: IT 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 IT outsourcing services.
Partial evidence: Its own public description names part of IT outsourcing services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name IT 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 24,285 IT outsourcing services worldwide

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IT outsourcing services worldwide at a glance

As of Sep 27, 2026

21.3%Verified-email coverage

7.7%Mobile-number coverage

22.7Average contacts per company

11-50Median size (employees)

2.8%Largest-city concentration · London

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

11,615

11-50

7,775

51-200

3,298

201-500

857

501-1,000

338

1,001-5,000

220

5,001-10,000

10001+

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 IT 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: 43 countries, largest first: the United States, Brazil, the United Kingdom, Germany, Canada, France, Australia, Italy, Spain, Poland and 33 more. Country and city lists for IT outsourcing services are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “IT 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 IT 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 IT 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, 117,642 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 27, 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.

IT outsourcing services by location

131 lists · largest first

Every IT 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 IT 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 IT outsourcing services are there worldwide?

RevenueBase identified 24,285 IT 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 IT outsourcing services?

The United States leads with 8,715 companies, followed by Brazil (2,176) and the United Kingdom (1,978). Every IT outsourcing services list by country and city is linked on this page.

Which city has the most IT outsourcing services?

London leads with 673 headquartered companies, followed by Sao Paulo (559) and New York (258).

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 117,642 verified decision-maker contacts tracked across these 24,285 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 27, 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.