Company lists · Data refreshed September 2026

Top 25 International tax services worldwide

Name: International tax services worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 14,391 companies tracked

RevenueBase identified 14,391 international tax services worldwide as of September 2026 and tracks 126,686 professional contacts across them, including 40,063 with verified work emails. Germany is the largest market and Sao Paulo the largest hub.

This list covers international tax 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 20, 2026. Country and city lists for international tax 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 20, 2026 86% judged on-target in blind review

14,391Companies

126,686Contacts tracked

40,063Verified emails

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The 25 largest international tax services worldwide

Ranked by team size

Top 25 of 14,391 international tax services worldwide, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to international tax 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	RYAN	Partial evidence	Dallas, TX, United StatesHQ checked Sep 20, 2026	5,001-10,000	6,089 contacts →
	Partial evidence “Ryan, an award-winning global tax services and software provider, is the largest Firm in the world dedicated exclusively to business taxes.” Source: RevenueBase Database · checked Sep 20, 2026
2	Vialto	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	5,001-10,000	5,587 contacts →
	Indirect evidence “Vialto is focused on transforming the global mobility ecosystem to support multinational organizations and their employees.” Source: RevenueBase Database · checked Sep 20, 2026
3	Leyton	Partial evidence	Issy-les-moulineaux, FranceHQ checked Sep 20, 2026	1,001-5,000	3,143 contacts →
	Partial evidence “We are an international consulting firm that helps businesses leverage financial incentives to boost their growth and achieve long-lasting performance.” Source: RevenueBase Database · checked Sep 20, 2026
4	TAX Consultant	Indirect evidence	Brighton, United KingdomHQ checked Sep 20, 2026	n/a	2,042 contacts →
	Indirect evidence “A traditional general practice, with a twist.” Source: RevenueBase Database · checked Sep 20, 2026
5	PKF O'connor Davies	Strong evidence	Harrison, NY, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,730 contacts →
	Strong evidence “PKF O’Connor Davies is a top-tier accounting, tax and advisory practice with a long history of serving domestic and international clients.” Source: RevenueBase Database · checked Sep 20, 2026
6	Moore Kingston Smith	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	501-1,000	1,151 contacts →
	Indirect evidence “At Moore Kingston Smith, we believe in the potential of people to make a positive impact, fuelled by the power of genuine understanding.” Source: RevenueBase Database · checked Sep 20, 2026
7	WTS Deutschland	Indirect evidence	München, GermanyHQ checked Sep 20, 2026	1,001-5,000	882 contacts →
	Indirect evidence “WTS ist ein globaler Full-Service Anbieter für Steuerberatungsleistungen und Financial & Deal Advisory.” Source: RevenueBase Database · checked Sep 20, 2026
8	DMA	Partial evidence	Fort Wayne, IN, United StatesHQ checked Sep 20, 2026	501-1,000	861 contacts →
	Partial evidence “Great Place to Work® Certified™ DMA, a proudly employee-owned company, has been solving corporate tax challenges for its clients since 1972.” Source: RevenueBase Database · checked Sep 20, 2026
9	PWC Hungary	Indirect evidence	Budapest, HungaryHQ checked Sep 20, 2026	501-1,000	749 contacts →
	Indirect evidence “A PwC Magyarország közel három évtizede nyújt ügyfeleinek nemzetközi színvonalú szolgáltatást könyvvizsgálat, adótanácsadás és üzleti tanácsadás területeken.” Source: RevenueBase Database · checked Sep 20, 2026
10	Deloitte Société D'avocats	Strong evidence	Paris La Défense, FranceHQ checked Sep 20, 2026	501-1,000	690 contacts →
	Strong evidence “Deloitte Société d'Avocats is one of the leading French law firms, specializing in international tax and legal strategies.” Source: RevenueBase Database · checked Sep 20, 2026
11	Chevez Ruiz Zamarripa	Indirect evidence	Ciudad De Mexico, MexicoHQ checked Sep 20, 2026	501-1,000	683 contacts →
	Indirect evidence “Chevez Ruiz Zamarripa, es una firma especializada en la Asesoría y Consultoría Fiscal de alto nivel, que se distingue por prestar servicios personalizados con total…” Source: RevenueBase Database · checked Sep 20, 2026
12	Kpmg Avocats	Indirect evidence	Courbevoie, FranceHQ checked Sep 20, 2026	501-1,000	669 contacts →
	Indirect evidence “Les entreprises de toutes tailles sont exposées à des dispositions de plus en plus complexes en matière de réglementations fiscales et juridiques sur leur territoire national et…” Source: RevenueBase Database · checked Sep 20, 2026
13	Kpmg Global Services Hungary	Partial evidence	Budapest, HungaryHQ checked Sep 20, 2026	501-1,000	562 contacts →
	Partial evidence “KPMG Global Services Hungary (KGSH) provides centralised tax compliance services to multinational companies.” Source: RevenueBase Database · checked Sep 20, 2026
14	Lisicki Litvin & Asociados	Indirect evidence	Ciudad Autónoma De Buenos Aires, ArgentinaHQ checked Sep 20, 2026	501-1,000	553 contacts →
	Indirect evidence “Somos una firma de profesionales altamente especializados y comprometidos con las necesidades de nuestros clientes.” Source: RevenueBase Database · checked Sep 20, 2026
15	Knav India	Partial evidence	Mumbai, IndiaHQ checked Sep 20, 2026	51-200	510 contacts →
	Partial evidence “KNAV is a dynamic global accounting and consulting firm, offering a comprehensive range of services including accounting, assurance, taxation, international transfer pricing…” Source: RevenueBase Database · checked Sep 20, 2026
16	K C Mehta & CO LLP	Indirect evidence	Vadodara, IndiaHQ checked Sep 20, 2026	201-500	504 contacts →
	Indirect evidence “K C Mehta & Co LLP (KCM) is a team of passionate professionals.” Source: RevenueBase Database · checked Sep 20, 2026
17	Sensiba LLP	Partial evidence	San Jose, CA, United StatesHQ checked Sep 20, 2026	501-1,000	493 contacts →
	Partial evidence “Sensiba’s comprehensive accounting, tax, and consulting services help businesses and people solve problems, navigate complexity, and build a foundation for sustainable growth.” Source: RevenueBase Database · checked Sep 20, 2026
18	AKM Global	Partial evidence	Gurgaon, IndiaHQ checked Sep 20, 2026	501-1,000	424 contacts →
	Partial evidence “AKM Global is a premier professional services firm, with specialization in tax, consulting and outsourcing services.” Source: RevenueBase Database · checked Sep 20, 2026
19	Smith Howard	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 20, 2026	501-1,000	413 contacts →
	Partial evidence “Smith + Howard is a tax, accounting, advisory, and consulting firm headquartered in Atlanta, with a global presence.” Source: RevenueBase Database · checked Sep 20, 2026
20	IBFD	Indirect evidence	Amsterdam, NetherlandsHQ checked Sep 20, 2026	201-500	413 contacts →
	Indirect evidence “Our mission is to advance the dissemination and understanding of information on cross-border taxation.” Source: RevenueBase Database · checked Sep 20, 2026
21	Dhruva Advisors India Pvt. LTD	Partial evidence	Mumbai, IndiaHQ checked Sep 20, 2026	501-1,000	408 contacts →
	Partial evidence “Dhruva Advisors, a Ryan LLC affiliate, delivers strategic tax and regulatory solutions to clients across India and around the world.” Source: RevenueBase Database · checked Sep 20, 2026
22	CRIDO	Indirect evidence	Warszawa, PolandHQ checked Sep 20, 2026	201-500	407 contacts →
	Indirect evidence “We are a leading Polish consulting firm committed to helping businesses make informed decisions.” Source: RevenueBase Database · checked Sep 20, 2026
23	Apercen Partners LLC	Partial evidence	Palo Alto, CA, United StatesHQ checked Sep 20, 2026	201-500	399 contacts →
	Partial evidence “Originating from the English and Latin roots of “apercu,” an act of insight, and “census,” an applied study of wealth and property, Apercen is a tax consulting firm offering high…” Source: RevenueBase Database · checked Sep 20, 2026
24	VLH	Indirect evidence	Neustadt An Der Weinstrasse, GermanyHQ checked Sep 20, 2026	1,001-5,000	373 contacts →
	Indirect evidence “Deutschlands Nr.” Source: RevenueBase Database · checked Sep 20, 2026
25	Cohesive	Indirect evidence	Exton, PA, United StatesHQ checked Sep 20, 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 20, 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: international tax 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 international tax services.
Partial evidence: Its own public description names part of international tax services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name international tax 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 14,391 international tax services worldwide

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International tax services worldwide at a glance

As of Sep 20, 2026

31.6%Verified-email coverage

8.8Average contacts per company

1-10Median size (employees)

1.6%Largest-city concentration · Sao Paulo

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

8,421

11-50

4,601

51-200

866

201-500

160

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 international tax 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 international tax services are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “international tax 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 international tax 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 international tax 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, 40,063 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 20, 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.

International tax services by location

63 lists · largest first

Every International tax 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 international tax 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 international tax services are there worldwide?

RevenueBase identified 14,391 international tax 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?

RYAN, headquartered in Dallas, tops this list with the largest team on record.

Which country has the most international tax services?

Germany leads with 3,129 companies, followed by the United States (1,893) and Brazil (930). Every international tax services list by country and city is linked on this page.

Which city has the most international tax services?

Sao Paulo leads with 233 headquartered companies, followed by Berlin (186) and London (168).

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 40,063 verified decision-maker contacts tracked across these 14,391 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 20, 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.