Company lists · Data refreshed September 2026

Top 25 B2B accounting services worldwide

Name: B2B accounting services worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 34,439 companies tracked

RevenueBase identified 34,439 B2B accounting services worldwide as of September 2026 and tracks 159,631 professional contacts across them, including 36,767 with verified work emails. The United States is the largest market and London the largest hub.

This list covers B2B accounting 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 B2B accounting 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

34,439Companies

159,631Contacts tracked

36,767Verified emails

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The 25 largest B2B accounting services worldwide

Ranked by team size

Top 25 of 34,439 B2B accounting services worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to B2B accounting 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	IQ Backoffice	Partial evidence	Manila, PhilippinesHQ checked Sep 21, 2026	501-1,000	831 contacts →
	Partial evidence “IQ BackOffice is the leading accounting Business Process Outsourcing and Automation provider, offering 99.97% quality and up to 68% savings to companies around the globe.” Source: RevenueBase Database · checked Sep 21, 2026
2	Metriqe Solutions	Partial evidence	Irving, TX, United StatesHQ checked Sep 21, 2026	201-500	571 contacts →
	Partial evidence “Founded in 2007, Metriqe Solutions started out as a Hotel Accounting firm in USA.” Source: RevenueBase Database · checked Sep 21, 2026
3	Outbooks	Partial evidence	Harrow, United KingdomHQ checked Sep 21, 2026	201-500	477 contacts →
	Partial evidence “Outbooks is a leading provider of outsourcing services to accounting and bookkeeping firms.” Source: RevenueBase Database · checked Sep 21, 2026
4	Share Microfin LTD	Partial evidence	Hyderabad, IndiaHQ checked Sep 21, 2026	1,001-5,000	477 contacts →
	Partial evidence “Share Microfin Ltd is an Accounting company located in 1-224/58, Rajeev Nagar, Nacharam, Hyderabad, Andhra Pradesh, India.” Source: RevenueBase Database · checked Sep 21, 2026
5	Global FPO	Partial evidence	Noida, IndiaHQ checked Sep 21, 2026	501-1,000	474 contacts →
	Partial evidence “Global FPO is an Accounting, Bookkeeping and Tax Consulting, and outsourcing company that helps CPAs, accounting firms, small and mid-sized businesses, and startups strengthen…” Source: RevenueBase Database · checked Sep 21, 2026
6	Supporting Strategies	Indirect evidence	Beverly, MA, United StatesHQ checked Sep 21, 2026	51-200	415 contacts →
	Indirect evidence “Outsourced Bookkeeping and Controller Services Supporting Strategies provides outsourced bookkeeping services, controller services and operational support to growing businesses.” Source: RevenueBase Database · checked Sep 21, 2026
7	Administratiekantoor Tidak B.V	Indirect evidence	Alphen Aan Den Rijn, NetherlandsHQ checked Sep 21, 2026	n/a	377 contacts →
	Indirect evidence “Tidak in Alphen aan den Rijn is het administratiekantoor voor startende ondernemers, zzp'ers, mkb en particulieren.” Source: RevenueBase Database · checked Sep 21, 2026
8	Cohesive	Indirect evidence	Exton, PA, United StatesHQ checked Sep 21, 2026	501-1,000	364 contacts →
	Indirect evidence “Cohesive is a leading solutions provider and systems integrator for IBM Maximo.” Source: RevenueBase Database · checked Sep 21, 2026
9	Advantage ONE TAX Consulting	Indirect evidence	Sterling, VA, United StatesHQ checked Sep 21, 2026	201-500	347 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 Sep 21, 2026
10	Process Solutions	Partial evidence	Budapest, HungaryHQ checked Sep 21, 2026	201-500	328 contacts →
	Partial 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 Sep 21, 2026
11	Alianzo	Indirect evidence	Goiânia, BrazilHQ checked Sep 21, 2026	201-500	320 contacts →
	Indirect evidence “Movidos pela alta performance, resultados financeiros, contábeis e operacionais excepcionais para nossos clientes, a Alianzo é feita por pessoas.” Source: RevenueBase Database · checked Sep 21, 2026
12	BDO Solutions	Indirect evidence	Moka, MauritiusHQ checked Sep 21, 2026	501-1,000	310 contacts →
	Indirect evidence “BDO Solutions is a Business Services & Outsourcing company located in Mauritius and forms part of the international BDO network, which extends across 166 countries and…” Source: RevenueBase Database · checked Sep 21, 2026
13	Mayatax	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	501-1,000	269 contacts →
	Indirect evidence “Growth exposes financial weakness.” Source: RevenueBase Database · checked Sep 21, 2026
14	Oremus Corporate Services	Partial evidence	Hyderabad, IndiaHQ checked Sep 21, 2026	201-500	260 contacts →
	Partial evidence “At Oremus Corporate Services, we specialize in delivering top-notch Accounting and Bookkeeping, Secretarial Compliance, Payroll, Tax, HR, and Business Advisory Services.” Source: RevenueBase Database · checked Sep 21, 2026
15	Kindercare Learing Center	Partial evidence	Portland, OR, United StatesHQ checked Sep 21, 2026	n/a	257 contacts →
	Partial evidence “Kindercare Learing Center is an Accounting company located in 650 NE Holladay St # 1400, Portland, Oregon, United States.” Source: RevenueBase Database · checked Sep 21, 2026
16	Mercurius Advisory Services	Partial evidence	New Delhi, IndiaHQ checked Sep 21, 2026	201-500	249 contacts →
	Partial evidence “Mercurius Advisory Services (MAS) provides comprehensive suite of accounting, bookkeeping and taxation services to small, medium and large enterprises.” Source: RevenueBase Database · checked Sep 21, 2026
17	TGG	Indirect evidence	San Antonio, TX, United StatesHQ checked Sep 21, 2026	51-200	249 contacts →
	Indirect evidence “The true performance of your business shouldn’t be a mystery.” Source: RevenueBase Database · checked Sep 21, 2026
18	SK Enterprises	Partial evidence	Artesia, CA, United StatesHQ checked Sep 21, 2026	n/a	240 contacts →
	Partial evidence “We are a full-service Accounting firm.” Source: RevenueBase Database · checked Sep 21, 2026
19	Small Business Services	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 21, 2026	n/a	229 contacts →
	Partial evidence “Founded in 1990 in Atlanta, Georgia, Small Business Services is part of LedgerWay, a tax, accounting, and advisory firm built for small businesses and entrepreneurs who are…” Source: RevenueBase Database · checked Sep 21, 2026
20	Baltic Assist	Partial evidence	Vilnius, LithuaniaHQ checked Sep 21, 2026	201-500	207 contacts →
	Partial evidence “Baltic Assist is a rapidly growing B2B organization that provides financial, business consulting, and virtual assistant services globally.” Source: RevenueBase Database · checked Sep 21, 2026
21	Fiduciaire	Indirect evidence	Beaufays, BelgiumHQ checked Sep 21, 2026	n/a	198 contacts →
	Indirect evidence “Bonjour et bienvenue sur la page entreprise de la Fiduciaire au Carré - Une équipe dynamique à votre service- Assistance efficace et conseils individualisés tant aux personnes…” Source: RevenueBase Database · checked Sep 21, 2026
22	Porte Brown LLC	Partial evidence	Elk Grove Village, IL, United StatesHQ checked Sep 21, 2026	51-200	191 contacts →
	Partial evidence “Porte Brown LLC is a full service accounting and consulting firm headquartered in the Chicago suburb of Elk Grove Village, Illinois.” Source: RevenueBase Database · checked Sep 21, 2026
23	Larson Gross	Partial evidence	Bellingham, WA, United StatesHQ checked Sep 21, 2026	201-500	186 contacts →
	Partial evidence “Larson Gross is a full-service firm providing comprehensive accounting, bookkeeping, tax, and consulting services to clients throughout the United States and Canada.” Source: RevenueBase Database · checked Sep 21, 2026
24	Indinero	Indirect evidence	Los Angeles, United StatesHQ checked Sep 21, 2026	201-500	175 contacts →
	Indirect evidence “Indinero is on a mission to help every business realize its potential.” Source: RevenueBase Database · checked Sep 21, 2026
25	Finance & Accounting For Business	Indirect evidence	Rushden, United KingdomHQ checked Sep 21, 2026	n/a	166 contacts →
	Indirect evidence “For your business to succeed.” 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: B2B accounting 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 B2B accounting services.
Partial evidence: Its own public description names part of B2B accounting services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name B2B accounting 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 34,439 B2B accounting services worldwide

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B2B accounting services worldwide at a glance

As of Sep 21, 2026

23.0%Verified-email coverage

4.6Average contacts per company

1-10Median size (employees)

1.3%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

26,910

11-50

6,361

51-200

734

201-500

113

501-1,000

1,001-5,000

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 B2B accounting 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 B2B accounting services are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “B2B accounting 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 B2B accounting 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 B2B accounting 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, 36,767 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.

B2B accounting services by location

120 lists · largest first

Every B2B accounting 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 B2B accounting 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 B2B accounting services are there worldwide?

RevenueBase identified 34,439 B2B accounting 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?

IQ Backoffice, headquartered in Taguig Manila, tops this list with the largest team on record.

Which country has the most B2B accounting services?

The United States leads with 11,844 companies, followed by Brazil (2,687) and the United Kingdom (2,389). Every B2B accounting services list by country and city is linked on this page.

Which city has the most B2B accounting services?

London leads with 452 headquartered companies, followed by Sao Paulo (381) and New York (238).

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 36,767 verified decision-maker contacts tracked across these 34,439 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.