Company lists · Data refreshed September 2026

Top 25 IT provider for professional services firms worldwide

Name: IT provider for professional services firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 32,979 companies tracked

RevenueBase identified 32,979 IT provider for professional services firms worldwide as of September 2026 and tracks 566,238 professional contacts across them, including 166,106 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers IT provider for professional services firms 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 IT provider for professional services firms 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

32,979Companies

566,238Contacts tracked

166,106Verified emails

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The 25 largest IT provider for professional services firms worldwide

Ranked by team size

Top 25 of 32,979 IT provider for professional services firms worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to IT provider for professional services firms: 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	Kpmg India	Partial evidence	Gurugram, IndiaHQ checked Sep 21, 2026	10001+	28,997 contacts →
	Partial evidence “KPMG entities in India are established under the laws of India and are owned and managed (as the case may be) by established Indian professionals.” Source: RevenueBase Database · checked Sep 21, 2026
2	BDO	Partial evidence	Brussels, BelgiumHQ checked Sep 21, 2026	10001+	14,003 contacts →
	Partial evidence “BDO is the leading provider of professional services within the mid-tier of our profession.” Source: RevenueBase Database · checked Sep 21, 2026
3	Guidehouse	Partial evidence	Mclean, VA, United StatesHQ checked Sep 21, 2026	10001+	12,815 contacts →
	Partial evidence “Guidehouse is a global AI-led professional services firm delivering advisory, technology, and managed services to the commercial and government sectors.” Source: RevenueBase Database · checked Sep 21, 2026
4	Wolters Kluwer	Partial evidence	Alphen Aan Den Rijn, NetherlandsHQ checked Sep 21, 2026	10001+	11,076 contacts →
	Partial evidence “Wolters Kluwer (EURONEXT: WKL) is a global leader in information, software solutions and services for professionals in healthcare; tax and accounting; financial and corporate…” Source: RevenueBase Database · checked Sep 21, 2026
5	Protiviti	Indirect evidence	Menlo Park, CA, United StatesHQ checked Sep 21, 2026	5,001-10,000	8,779 contacts →
	Indirect evidence “Protiviti is a global consulting firm that delivers deep expertise, objective insights, a tailored approach and unparalleled collaboration to help leaders confidently face the…” Source: RevenueBase Database · checked Sep 21, 2026
6	BDO UK	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	5,001-10,000	6,933 contacts →
	Indirect evidence “BDO LLP is an accountancy and business advisory firm that provides Audit, Tax, Deals, and Consulting, Risk & Outsourcing (CR & O) services to entrepreneurial, growing and…” Source: RevenueBase Database · checked Sep 21, 2026
7	CBIZ	Partial evidence	Independence, OH, United StatesHQ checked Sep 21, 2026	10001+	6,369 contacts →
	Partial evidence “CBIZ, Inc.(NYSE: CBZ) is a leading professional services advisor to middle-market businesses nationwide.” Source: RevenueBase Database · checked Sep 21, 2026
8	BDO India	Partial evidence	Mumbai, IndiaHQ checked Sep 21, 2026	5,001-10,000	6,148 contacts →
	Partial evidence “BDO India is the Indian member firm of BDO, the world’s fifth-largest professional services organisation, operating in 166 countries and territories with a team of over…” Source: RevenueBase Database · checked Sep 21, 2026
9	BDO Canada	Partial evidence	Toronto, ON, CanadaHQ checked Sep 21, 2026	1,001-5,000	4,833 contacts →
	Partial evidence “Canada’s Top 100 Employers 2025 I 2024 I 2023 I 2022 BDO Canada LLP is a leading provider of professional services to clients across a variety of sectors and segments.” Source: RevenueBase Database · checked Sep 21, 2026
10	Wipfli	Indirect evidence	Milwaukee, WI, United StatesHQ checked Sep 21, 2026	1,001-5,000	3,047 contacts →
	Indirect evidence “Always advancing.” Source: RevenueBase Database · checked Sep 21, 2026
11	Citrin Cooperman	Partial evidence	New York, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,996 contacts →
	Partial evidence “Citrin Cooperman is one of the nation’s largest and fastest-growing professional services firms.” Source: RevenueBase Database · checked Sep 21, 2026
12	Armanino	Partial evidence	San Ramon, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,989 contacts →
	Partial evidence “Founded as an alternative to the status quo, Armanino doesn’t just keep up with change, we embrace it.” Source: RevenueBase Database · checked Sep 21, 2026
13	PWC Sweden	Indirect evidence	Stockholm, SwedenHQ checked Sep 21, 2026	1,001-5,000	2,276 contacts →
	Indirect evidence “På PwC hjälper vi våra kunder att bygga förtroende och ställa om sin verksamhet för att öka konkurrenskraften.” Source: RevenueBase Database · checked Sep 21, 2026
14	IT Group, INC	Partial evidence	Quezon City, PhilippinesHQ checked Sep 21, 2026	n/a	2,238 contacts →
	Partial evidence “IT Group, Inc.(also known as ITG), is an Information Technology solutions partner that endeavors to provide growing organizations with solutions that meet the unique needs of…” Source: RevenueBase Database · checked Sep 21, 2026
15	Iris Software Group	Indirect evidence	Slough, United KingdomHQ checked Sep 21, 2026	1,001-5,000	2,218 contacts →
	Indirect evidence “IRIS Software Group is a leading business software and services provider, one of the UK’s largest privately held software companies.” Source: RevenueBase Database · checked Sep 21, 2026
16	Uhy-Us	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,035 contacts →
	Partial evidence “UHY is one of the nation’s largest professional services firms providing audit, tax, consulting and advisory services to clients primarily in the dynamic middle market.” Source: RevenueBase Database · checked Sep 21, 2026
17	Kpmg Philippines	Indirect evidence	Makati City, PhilippinesHQ checked Sep 21, 2026	1,001-5,000	1,888 contacts →
	Indirect evidence “KPMG R.G.” Source: RevenueBase Database · checked Sep 21, 2026
18	Weaver	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,860 contacts →
	Indirect evidence “Weaver has built a nationwide presence on an unwavering commitment to client success, acting with integrity and always striving to transcend expectations.” Source: RevenueBase Database · checked Sep 21, 2026
19	Davies	Partial evidence	City Of London, United KingdomHQ checked Sep 21, 2026	5,001-10,000	1,840 contacts →
	Partial evidence “We are a specialist professional services and technology firm, working in partnership with leading insurance, highly regulated and global businesses.” Source: RevenueBase Database · checked Sep 21, 2026
20	Kpmg Poland	Indirect evidence	Warsaw, PolandHQ checked Sep 21, 2026	1,001-5,000	1,696 contacts →
	Indirect evidence “KPMG jest globalną organizacją niezależnych firm świadczących profesjonalne usługi z zakresu audytu, doradztwa podatkowego, finansowego, prawnego oraz consultingu.” Source: RevenueBase Database · checked Sep 21, 2026
21	Sikich	Partial evidence	Chicago, IL, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,688 contacts →
	Partial evidence “Sikich offers the public and private sectors a diverse platform of professional services across consulting, technology, and compliance.” Source: RevenueBase Database · checked Sep 21, 2026
22	Emagine	Partial evidence	Copenhagen, DenmarkHQ checked Sep 21, 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 21, 2026
23	IDS Infotech Limited	Indirect evidence	Mohali, IndiaHQ checked Sep 21, 2026	1,001-5,000	1,544 contacts →
	Indirect evidence “IDS Infotech empowers global industrial and regulatory enterprises with AI-enabled intelligence and end-to-end execution.” Source: RevenueBase Database · checked Sep 21, 2026
24	BDO In Indonesia	Partial evidence	Jakarta, IndonesiaHQ checked Sep 21, 2026	501-1,000	1,508 contacts →
	Partial evidence “BDO is the leading provider of professional services within the mid-tier of our profession.” Source: RevenueBase Database · checked Sep 21, 2026
25	BPM LLP	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,303 contacts →
	Indirect evidence “Hi there, we're BPM!” 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: IT provider for professional services firms. 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 provider for professional services firms.
Partial evidence: Its own public description names part of IT provider for professional services firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name IT provider for professional services firms. 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 32,979 IT provider for professional services firms worldwide

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IT provider for professional services firms worldwide at a glance

As of Sep 21, 2026

29.3%Verified-email coverage

17.2Average contacts per company

1-10Median size (employees)

1.5%Largest-city concentration · Sao Paulo

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

18,550

11-50

10,417

51-200

2,847

201-500

649

501-1,000

199

1,001-5,000

155

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 IT provider for professional services firms, 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 IT provider for professional services firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “IT provider for professional services firms”. 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 provider for professional services firms), 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 provider for professional services firms, 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, 166,106 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.

IT provider for professional services firms by location

157 lists · largest first

Every IT provider for professional services firms 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 provider for professional services firms, 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 provider for professional services firms are there worldwide?

RevenueBase identified 32,979 IT provider for professional services firms 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?

Kpmg India, headquartered in Gurugram, tops this list with the largest team on record.

Which country has the most IT provider for professional services firms?

The United States leads with 7,676 companies, followed by India (2,323) and Brazil (1,855). Every IT provider for professional services firms list by country and city is linked on this page.

Which city has the most IT provider for professional services firms?

Sao Paulo leads with 490 headquartered companies, followed by London (471) and Paris (243).

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 166,106 verified decision-maker contacts tracked across these 32,979 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.