Company lists · Data refreshed November 2026

Top 14 Tax id providers worldwide

RevenueBase identified 98 company matches for tax id providers worldwide as of November 2026 and tracks 812 professional contacts across them, including 213 with verified work emails. The United States is the largest market and Hyderabad the largest hub.

This list covers company matches for tax id providers worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026. Country and city lists for tax id providers follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
98Companies
812Contacts tracked
213Verified emails
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The 14 largest tax id providers worldwide

Ranked by team size
Top 14 of 98 company matches for tax id providers worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchFlorence, SC, United StatesHQ recorded Nov 6, 2026201-500213 contacts →

Exact match

“Synergi specializes in processing federal and state tax credits for employers across the United States and Puerto Rico.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchHyderabad, IndiaHQ recorded Nov 6, 202651-20018 contacts →

Exact match

“US Tax Services for Individuals, Self Employed, Business, Tax Planning, Estimated tax assessment, Amendment, ITIN services, Representation, FBAR.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchMiami Beach, FL, United StatesHQ recorded Nov 6, 202611-5014 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-507 contacts →

Exact match

“American Tax Returns Ltd prepares American tax returns and provides sensible, practical, “joined-up” US and UK tax advice to individuals and their advisers; all for a fee agreed…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchWI, United StatesHQ recorded Nov 6, 2026201-5006 contacts →

Exact match

“Our mission at HNI Tax Filer is to offer a hassle-free global tax filing experience, ensuring maximum refunds and accurate deductions.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchEdina, MN, United StatesHQ recorded Nov 6, 20261-105 contacts →

Exact match

“If you are a foreign national visiting the United States, this is your headquarters for tax information.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchCoral Springs, FL, United StatesHQ recorded Nov 6, 20261-104 contacts →

Exact match

“At IBA Tax Group we are dedicated to providing outstanding service to our clients.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchMinneapolis, MN, United StatesHQ recorded Nov 6, 20261-103 contacts →

Exact match

“Integrity Professional Services is a company that offers Income tax services, business advice, rent, contractors, accounting services, payroll, obtain and renewing ITINS, all…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchOrem, UT, United StatesHQ recorded Nov 6, 20261-102 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchDowney, CA, United StatesHQ recorded Nov 6, 20261-102 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchDublin, IrelandHQ recorded Nov 6, 20261-101 contacts →

Exact match

“American tax specialists based in Dublin • Advising individuals, businesses, investors, and estates on U.S.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchMiami, FL, United StatesHQ recorded Nov 6, 20261-101 contacts →

Exact match

“Business Taxes, Personal Taxes, Foreign Taxes, ITIN’s applications, Bookkeeping, Sales Taxes and much more…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchRiverdale, GA, United StatesHQ recorded Nov 6, 20261-101 contacts →

Exact match

“OUR SERVICES Individual & Business Tax Preparation Individual & Business Financial Consulting.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchFlorence, KY, United StatesHQ recorded Nov 6, 20261-101 contacts →

Exact match

“Corporate and Personal Tax Preparation Services | ITIN/EIN Application and Renewal | Business Formation (Sole Proprietorship, LLCs, Corporations)| Optimization (Registration…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 14 of 98 tax id providers worldwide

See the full list, filter by size, metro and specialty, and access 213 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Tax id providers worldwide at a glance

As of Nov 6, 2026
26.2%Verified-email coverage
8.3Average contacts per company
1-10Median size (employees)
4.1%Largest-city concentration · Hyderabad
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
69
11-50
20
51-200
4
201-500
2
1,001-5,000
1

Email recency is reported on each country list linked below.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
Coverage
Every country. Country and city lists for tax id providers are linked below.
What qualifies
Company records worldwide whose business descriptions match “tax id providers” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 213 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Tax id providers by location

1 lists · largest first

Every Tax id providers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “tax id providers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many tax id providers are there worldwide?

RevenueBase identified 98 company matches for tax id providers worldwide as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Synergi tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most tax id providers?

The United States leads with 64 companies. Every tax id providers list by country and city is linked on this page.

Which city has the most tax id providers?

Hyderabad leads with 4 company records, followed by Florence (2) and Karachi (2).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 213 professional contacts with verified work emails tracked across these 98 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 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 SmartSearch, 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.