Company lists · Data refreshed August 2026

Top 25 Accounting services outsourcing companies worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Aug 30, 2026 32,128 companies tracked

RevenueBase identified 32,128 accounting services outsourcing companies worldwide as of August 2026 and tracks 179,929 professional contacts across them, including 45,102 with verified work emails and 21,756 with mobile numbers. The United States is the largest market and Sao Paulo the largest hub.

This list covers accounting services outsourcing 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 August 30, 2026. Country and city lists for accounting services outsourcing 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 RevenueBase Smart Search rating on every row Refreshed Aug 30, 2026 86% judged on-target in blind review

32,128Companies

179,929Contacts tracked

45,102Verified emails

21,756Mobile numbers

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The 25 largest accounting services outsourcing companies worldwide

Ranked by team size

Top 25 of 32,128 accounting services outsourcing companies worldwide, ranked by team size, largest first. Data refreshed Aug 30, 2026. RevenueBase Smart Search rates how each company's information relates to accounting services outsourcing 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	Fiducial	Indirect evidence	La Defense Cedex, FR	10001+	4,618 contacts →
	Indirect evidence “Fiducial is a major international provider of professional services to small businesses.” Source: RevenueBase Database · checked Aug 30, 2026
2	TOA Global	Indirect evidence	Southport, AU	1,001-5,000	3,896 contacts →
	Indirect evidence “Don’t wait until understaffing eats away at your productivity and client satisfaction.” Source: RevenueBase Database · checked Aug 30, 2026
3	BDO Brazil	Indirect evidence	Belo Horizonte, BR	1,001-5,000	1,779 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 Aug 30, 2026
4	Grant Thornton España	Indirect evidence	Madrid, ES	501-1,000	880 contacts →
	Indirect evidence “En Grant Thornton España ayudamos a que tu empresa vaya más allá.” Source: RevenueBase Database · checked Aug 30, 2026
5	Bernhoeft	Indirect evidence	Sao Paulo, BR	501-1,000	843 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 Aug 30, 2026
6	Pacific Group Of Companies	Partial evidence	Irvine, CA, US	1,001-5,000	801 contacts →
	Partial evidence “Established in 2008, Pacific was formed to serve the clients with the best services in the field of outsourced accounting.” Source: RevenueBase Database · checked Aug 30, 2026
7	Domingues E Pinho Contadores	Indirect evidence	Sao Paulo, BR	501-1,000	668 contacts →
	Indirect evidence “Fundada em 1984, a Domingues e Pinho Contadores conta com uma trajetória de sucesso, baseada na ética e na excelência dos serviços prestados.” Source: RevenueBase Database · checked Aug 30, 2026
8	KMK	Partial evidence	Los Angeles, CA, US	1,001-5,000	612 contacts →
	Partial evidence “KMK Ventures is a leading Outsourced Accounting & Tax solutions company providing services to clients based out of USA.” Source: RevenueBase Database · checked Aug 30, 2026
9	BDO Luxembourg	Indirect evidence	Diekirch, LU	501-1,000	606 contacts →
	Indirect evidence “BDO Luxembourg is one of the largest firms of accountants, auditors and consultants in Luxembourg.” Source: RevenueBase Database · checked Aug 30, 2026
10	Accsource	Strong evidence	Pymble, AU	201-500	572 contacts →
	Strong evidence “AccSource is an ISO27001-certified business process outsourcing company specialising in accounting, operational, administrative and compliance business processes for all small to…” Source: RevenueBase Database · checked Aug 30, 2026
11	Metriqe Solutions	Partial evidence	Irving, TX, US	201-500	571 contacts →
	Partial evidence “Founded in 2007, Metriqe Solutions started out as a Hotel Accounting firm in USA.” Source: RevenueBase Database · checked Aug 30, 2026
12	Bennett Thrasher	Partial evidence	Denver, CO, US	201-500	546 contacts →
	Partial evidence “Bennett Thrasher provides proven guidance for financial confidence through premier tax, audit, advisory, and outsourcing solutions.” Source: RevenueBase Database · checked Aug 30, 2026
13	BDO Sverige	Indirect evidence	Stockholm, SE	501-1,000	505 contacts →
	Indirect evidence “BDO – en global byrå med nöjdast kunder i revisionsbranschen BDO är en revisions- och rådgivningsbyrå som finns med dig hela vägen.” Source: RevenueBase Database · checked Aug 30, 2026
14	NOW CFO	Indirect evidence	Fresno, CA, US	201-500	488 contacts →
	Indirect evidence “We specialize in providing full-service CFOs, controllers, and operational accountants to consult with our clients.” Source: RevenueBase Database · checked Aug 30, 2026
15	Outbooks	Strong evidence	London, GB	201-500	475 contacts →
	Strong evidence “Outbooks is a leading provider of outsourcing services to accounting and bookkeeping firms.” Source: RevenueBase Database · checked Aug 30, 2026
16	Outsource Partners International Alumni	Strong evidence	New York, NY, US	1,001-5,000	398 contacts →
	Strong evidence “Outsource Partners International (OPI) is a professional services firm dedicated to the outsourcing of finance, accounting, and analytics business processes.” Source: RevenueBase Database · checked Aug 30, 2026
17	Bench Accounting By Mainstreet	Indirect evidence	San Francisco, CA, US	201-500	376 contacts →
	Indirect evidence “At Bench by Mainstreet, we believe small business owners deserve more than just software - they deserve real financial support.” Source: RevenueBase Database · checked Aug 30, 2026
18	BDO México	Indirect evidence	Cuauhtemoc, MX	501-1,000	365 contacts →
	Indirect evidence “Somos la quinta firma de contadores públicos y consultores de negocio a nivel mundial, proporcionamos los servicios profesionales de Auditoría; Impuestos y Consultoría Fiscal…” Source: RevenueBase Database · checked Aug 30, 2026
19	Cohesive	Indirect evidence	Croydon, GB	501-1,000	360 contacts →
	Indirect evidence “Cohesive is a leading solutions provider and systems integrator for IBM Maximo.” Source: RevenueBase Database · checked Aug 30, 2026
20	Hammerjack	Partial evidence	Sydney, AU	501-1,000	356 contacts →
	Partial evidence “Outsource Solutions For Business hammerjack is an Australian & Philippine owned and operated offshore outsourcing services provider.” Source: RevenueBase Database · checked Aug 30, 2026
21	Advantage ONE TAX Consulting	Indirect evidence	Sterling, VA, US	201-500	348 contacts →
	Indirect evidence “Advantage One Tax Consulting is a multi-disciplinary group of highly experienced tax professionals who understand the tax practice in its true spirit, examine the issues it faces…” Source: RevenueBase Database · checked Aug 30, 2026
22	Makosi	Partial evidence	New York, NY, US	201-500	340 contacts →
	Partial evidence “For over 15 years, Makosi has been redefining what’s possible in the accounting and audit industry with cutting-edge, tech-powered workforce solutions.” Source: RevenueBase Database · checked Aug 30, 2026
23	Process Solutions	Strong evidence	Bucharest, RO	201-500	335 contacts →
	Strong evidence “Process Solutions (PS) is a group providing Business Process Outsourcing services, operating an independent accounting business in the Central European region.” Source: RevenueBase Database · checked Aug 30, 2026
24	Unison Globus	Strong evidence	Coral Springs, FL, US	201-500	325 contacts →
	Strong evidence “Unison Globus is a global accounting outsourcing and offshore staffing partner dedicated to supporting CPA firms and accounting professionals.” Source: RevenueBase Database · checked Aug 30, 2026
25	SKS Business Services	Indirect evidence	London, GB	501-1,000	321 contacts →
	Indirect evidence “At SKS, we pride ourselves on being different.” Source: RevenueBase Database · checked Aug 30, 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 services outsourcing 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 services outsourcing companies.
Partial evidence: Its own public description names part of accounting services outsourcing companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name accounting services outsourcing 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 32,128 accounting services outsourcing companies worldwide

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Accounting services outsourcing companies worldwide at a glance

As of Aug 30, 2026

25.1%Verified-email coverage

12.1%Mobile-number coverage

5.6Average contacts per company

1-10Median size (employees)

2.8%Largest-city concentration · Sao Paulo

Aug 30, 2026Page data refreshed

Companies by employee count

1-10

23,914

11-50

6,494

51-200

852

201-500

135

501-1,000

1,001-5,000

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 services outsourcing 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: 40 countries, largest first: the United States, Brazil, the United Kingdom, Canada, Australia, France, the Netherlands, South Africa, Sweden, Poland and 30 more. Country and city lists for accounting services outsourcing companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “accounting services outsourcing 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 services outsourcing 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 services outsourcing 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, 45,102 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 August 30, 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 services outsourcing companies by location

92 lists · largest first

Every Accounting services outsourcing 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 services outsourcing 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 services outsourcing companies are there worldwide?

RevenueBase identified 32,128 accounting services outsourcing companies worldwide as of August 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?

Fiducial, headquartered in La Defense Cedex, tops this list with the largest team on record.

Which country has the most accounting services outsourcing companies?

The United States leads with 12,216 companies, followed by Brazil (5,460) and the United Kingdom (2,727). Every accounting services outsourcing companies list by country and city is linked on this page.

Which city has the most accounting services outsourcing companies?

Sao Paulo leads with 894 headquartered companies, followed by London (543) and New York (277).

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 45,102 verified decision-maker contacts tracked across these 32,128 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on August 30, 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.