Company lists · Data refreshed September 2026

Top 25 Accounting firm IT support companies worldwide

Name: Accounting firm IT support companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 69,560 companies tracked

RevenueBase identified 69,560 accounting firm IT support companies worldwide as of September 2026 and tracks 703,309 professional contacts across them, including 278,252 with verified work emails and 132,932 with mobile numbers. The United States is the largest market and Sao Paulo the largest hub.

This list covers accounting firm IT 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 22, 2026. Country and city lists for accounting firm IT 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 22, 2026 86% judged on-target in blind review

69,560Companies

703,309Contacts tracked

278,252Verified emails

132,932Mobile numbers

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The 25 largest accounting firm IT support companies worldwide

Ranked by team size

Top 25 of 69,560 accounting firm IT support companies worldwide, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to accounting firm IT 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	MNP	Partial evidence	Calgary, AB, CanadaHQ checked Sep 22, 2026	5,001-10,000	8,773 contacts →
	Partial evidence “MNP is a leading national accounting, tax and business consulting firm in Canada.” Source: RevenueBase Database · checked Sep 22, 2026
2	BDO UK	Indirect evidence	London, United KingdomHQ checked Sep 22, 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 22, 2026
3	Kpmg France	Indirect evidence	Paris La Défense, FranceHQ checked Sep 22, 2026	10001+	5,839 contacts →
	Indirect evidence “Leader de l'audit, du conseil et de l'expertise comptable, KPMG France est membre de KPMG International, réseau de cabinets indépendants exerçant dans 155 pays.” Source: RevenueBase Database · checked Sep 22, 2026
4	TOA Global	Indirect evidence	Southport, AustraliaHQ checked Sep 22, 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 22, 2026
5	Grant Thornton Ireland	Indirect evidence	Dublin, IrelandHQ checked Sep 22, 2026	1,001-5,000	2,374 contacts →
	Indirect evidence “In Ireland, Grant Thornton Ireland and Grant Thornton Corporate Finance Limited (and their respective subsidiary/affiliate entities) operate under an alternative practice…” Source: RevenueBase Database · checked Sep 22, 2026
6	S&w	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	1,001-5,000	1,930 contacts →
	Partial evidence “As a fast growing UK accounting and advisory firm, we’ve been there, as a trusted partner, helping businesses and individuals meet challenges and seize opportunities across…” Source: RevenueBase Database · checked Sep 22, 2026
7	BDO Brazil	Indirect evidence	Sp, BrazilHQ checked Sep 22, 2026	1,001-5,000	1,791 contacts →
	Indirect evidence “Presidida por Raul Corrêa da Silva, a BDO RCS foi fundada em 2001 e desde então mantém participação expressiva no mercado de auditorias.” Source: RevenueBase Database · checked Sep 22, 2026
8	Grant Thornton Sweden	Indirect evidence	Stockholm, SwedenHQ checked Sep 22, 2026	1,001-5,000	1,724 contacts →
	Indirect evidence “Grant Thornton är ett ledande revisions- och rådgivningsföretag med över 1400 medarbetare som erbjuder tjänster inom revision, skatt, redovisning och specialistrådgivning.” Source: RevenueBase Database · checked Sep 22, 2026
9	Grant Thornton Australia	Partial evidence	Sydney, AustraliaHQ checked Sep 22, 2026	1,001-5,000	1,626 contacts →
	Partial evidence “Your business deserves remarkable support.” Source: RevenueBase Database · checked Sep 22, 2026
10	Beierholm	Indirect evidence	Aalborg, DenmarkHQ checked Sep 22, 2026	1,001-5,000	1,568 contacts →
	Indirect evidence “Beierholm is the preferred auditing and consulting company for small and medium-sized companies in Denmark.” Source: RevenueBase Database · checked Sep 22, 2026
11	BDO Norge	Indirect evidence	Oslo, NorwayHQ checked Sep 22, 2026	1,001-5,000	1,530 contacts →
	Indirect evidence “We see great value in having a local presence and roots, factors which enable us to work closely with our clients.” Source: RevenueBase Database · checked Sep 22, 2026
12	RSM France	Indirect evidence	Paris, FranceHQ checked Sep 22, 2026	1,001-5,000	1,330 contacts →
	Indirect evidence “RSM en France, membre de RSM International, 6ème réseau international d'audit, expertise comptable et conseil, c'est 18 implantations dans les principaux pôles régionaux et près…” Source: RevenueBase Database · checked Sep 22, 2026
13	ASPIA	Indirect evidence	Stockholm, SwedenHQ checked Sep 22, 2026	1,001-5,000	1,280 contacts →
	Indirect evidence “Aspia är Nordeuropas ledande affärspartner för företag som vill ta nästa steg.” Source: RevenueBase Database · checked Sep 22, 2026
14	Mallette	Indirect evidence	Québec, QC, CanadaHQ checked Sep 22, 2026	1,001-5,000	1,268 contacts →
	Indirect evidence “Mallette compte plus de 40 bureaux solidement implantés dans plusieurs régions du Québec et regroupe plus de 1 600 ressources œuvrant dans différents secteurs d’activité.” Source: RevenueBase Database · checked Sep 22, 2026
15	AAB	Indirect evidence	Uk And Ireland, United KingdomHQ checked Sep 22, 2026	1,001-5,000	1,125 contacts →
	Indirect evidence “We provide services that help businesses at every stage of the lifecycle.” Source: RevenueBase Database · checked Sep 22, 2026
16	William Buck	Indirect evidence	Sydney, AustraliaHQ checked Sep 22, 2026	1,001-5,000	1,088 contacts →
	Indirect evidence “William Buck is a leading firm of Accountants and advisors with 150 partners and over 1,100 professional staff.” Source: RevenueBase Database · checked Sep 22, 2026
17	Moore Belgium	Partial evidence	Brussels, BelgiumHQ checked Sep 22, 2026	1,001-5,000	1,087 contacts →
	Partial evidence “Moore Belgium is het grootste onafhankelijke accounting- en consulting bedrijf in België dat ondernemers helpt hun droom te realiseren.” Source: RevenueBase Database · checked Sep 22, 2026
18	Xeinadin	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	1,001-5,000	1,001 contacts →
	Indirect evidence “We are a leading provider of accountancy services and business advice for small and medium-sized enterprises and individuals across the UK and Ireland.” Source: RevenueBase Database · checked Sep 22, 2026
19	Grant Thornton España	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	501-1,000	890 contacts →
	Indirect evidence “En Grant Thornton España ayudamos a que tu empresa vaya más allá.” Source: RevenueBase Database · checked Sep 22, 2026
20	Bernhoeft	Indirect evidence	Recife, BrazilHQ checked Sep 22, 2026	501-1,000	833 contacts →
	Indirect evidence “A Bernhoeft Contadores é uma empresa de atuação nacional que oferece terceirização de serviços contábeis para clientes de diversos portes e segmentos.” Source: RevenueBase Database · checked Sep 22, 2026
21	Orcom Cabinet D'expertise Comptable, Audit ET Conseil	Indirect evidence	Orléans, FranceHQ checked Sep 22, 2026	1,001-5,000	800 contacts →
	Indirect evidence “Pour ORCOM, le conseil est un état d'esprit.” Source: RevenueBase Database · checked Sep 22, 2026
22	Grant Thornton Netherlands	Partial evidence	Alphen Aan Den Rijn, NetherlandsHQ checked Sep 22, 2026	501-1,000	739 contacts →
	Partial evidence “Grant Thornton in the Netherlands is a memberfirm of Grant Thornton International Ltd (GTIL), one of the world's largest networks [#7] of independent accounting and consulting…” Source: RevenueBase Database · checked Sep 22, 2026
23	PKF Littlejohn	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	501-1,000	702 contacts →
	Indirect evidence “We are a fast-growing firm of accountants and business advisers based in London’s Canary Wharf, Leeds and in Manchester.” Source: RevenueBase Database · checked Sep 22, 2026
24	Blick Rothenberg	Partial evidence	Covent Garden, United KingdomHQ checked Sep 22, 2026	501-1,000	701 contacts →
	Partial evidence “Blick Rothenberg is a leading tax, accounting and business advisory firm founded on personal integrity and technical expertise.” Source: RevenueBase Database · checked Sep 22, 2026
25	Pkf-Francis Clark Chartered Accountants & Business Advisers	Indirect evidence	Exeter, United KingdomHQ checked Sep 22, 2026	501-1,000	700 contacts →
	Indirect evidence “Any good accountancy firm can help with your finance, audit, and tax.” Source: RevenueBase Database · checked Sep 22, 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: accounting firm IT 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 accounting firm IT support companies.
Partial evidence: Its own public description names part of accounting firm IT support companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name accounting firm IT 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 69,560 accounting firm IT support companies worldwide

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Accounting firm IT support companies worldwide at a glance

As of Sep 22, 2026

39.6%Verified-email coverage

18.9%Mobile-number coverage

10.1Average contacts per company

1-10Median size (employees)

2.6%Largest-city concentration · Sao Paulo

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

47,146

11-50

19,983

51-200

3,040

201-500

432

501-1,000

138

1,001-5,000

123

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 accounting firm IT 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: 39 countries, largest first: the United States, Brazil, the United Kingdom, Canada, France, Australia, Italy, the Netherlands, South Africa, Germany and 29 more. Country and city lists for accounting firm IT support companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “accounting firm IT 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 accounting firm IT 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 accounting firm IT 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, 278,252 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 22, 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.

Accounting firm IT support companies by location

366 lists · largest first

Every Accounting firm IT 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 accounting firm IT 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 accounting firm IT support companies are there worldwide?

RevenueBase identified 69,560 accounting firm IT 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?

MNP, headquartered in Calgary, tops this list with the largest team on record.

Which country has the most accounting firm IT support companies?

The United States leads with 22,908 companies, followed by Brazil (11,311) and the United Kingdom (7,957). Every accounting firm IT support companies list by country and city is linked on this page.

Which city has the most accounting firm IT support companies?

Sao Paulo leads with 1818 headquartered companies, followed by London (1540) and New York (639).

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 278,252 verified decision-maker contacts tracked across these 69,560 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 22, 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.