Company lists · Data refreshed September 2026
Top 25 Irs compliance software companies based in the United States
RevenueBase identified 222 irs compliance software companies headquartered in the United States as of September 2026 and tracks 13,288 professional contacts across them, including 7,200 with verified work emails and 4,662 with mobile numbers. New York is the largest hub.
This list covers irs compliance software companies headquartered in the United States, 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, how directly it supports the match, and when it was last checked. Data refreshed September 4, 2026.
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.
The 25 largest irs compliance software companies based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 6,055 | ||||
“Ryan, an award-winning global tax services and software provider, is the largest Firm in the world dedicated exclusively to business taxes.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 2 | Vertex INCIndirect evidence | 2,060 | |||
“The rapid changes taking place in today’s global business, technology, and regulatory environments are having a compounding effect on the complexity of indirect tax management and…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 3 | 1,592 | ||||
“Wolters Kluwer Tax & Accounting U.S.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 4 | 560 | ||||
“Drake Software, a private company founded in 1977, provides software solutions to over tax and accounting firms that file more than 40 million tax returns every year.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 5 | 306 | ||||
“TTI’s flagship product, Tax Series, is an all-inclusive SaaS solution that can handle all aspects of U.S.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 6 | 287 | ||||
“SurePrep was founded in 2002 and is the leader in 1040 productivity for CPA firms.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 7 | Zenwork, INCPartial evidence | 200 | |||
“Zenwork, through its Tax1099 and Compliancely brands, is a fast-growing digital tax compliance and regulatory reporting technology company, with 10+ years of experience powering…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 8 | 137 | ||||
“Taxwell is a leading digital tax filing platform formed in 2022 from the combination of Drake Software® and TaxAct®.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 9 | 136 | ||||
“CrossLink Professional Tax Solutions (CPTS) is a leading provider of professional tax software solutions for professional tax preparers across the United States.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 10 | 136 | ||||
“Instead is where tax work gets done.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 11 | 122 | ||||
“Greatland is a rapidly growing company of more than 135 employee-owners, all focused on building on our position as the leading provider of W-2 and 1099 reporting solutions for…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 12 | KintsugiIndirect evidence | 108 | |||
“Kintsugi is automating sales tax for every company globally.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 13 | 107 | ||||
“Tax Preparer is a financial services company based out of 25 Washington St, Newbury, New Hampshire, United States.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 14 | 98 | ||||
“Holistiplan, a tax planning software solution, helps financial planners be more comprehensive AND more efficient.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 15 | 72 | ||||
“Sigma Tax Pro serves professional Tax Preparers, Accountants, and CPAs with industry-leading software solutions.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 16 | 57 | ||||
“TTR, The Tax Research Company, provides everything sales, use, and transaction tax-related.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 17 | 56 | ||||
“CereTax is the first tax automation solution built to take advantage of the countless technological advancements over the last decade and engineered in a way that truly transforms…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 18 | 54 | ||||
“Founded by tax experts and backed by proprietary technology, Arvo is the only holistic approach that brings together the ability to develop and document a tax strategy with tax…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 19 | 52 | ||||
“Located in Grand Forks, ND, Aatrix Software, a Sovos Company has been developing innovative accounting software solutions since 1986.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 20 | 36 | ||||
“IRS Solutions® is a full-service tax resolution and IRS monitoring platform that helps CPAs, attorneys, and enrolled agents earn more in fewer hours at their desks.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 21 | Sattar & Associates, INCIndirect evidence | 35 | |||
“At Sattar & Associates, we provide relevant, timely, and innovative solutions to address the mounting jurisdictional demands in multi-state Sales and Use Tax, and business…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 22 | 25 | ||||
“FileYourTaxes.com is a faster, convenient, contemporary, and hassle-free way to file taxes.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 23 | 22 | ||||
“Who Are We?” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 24 | Taxjar A Stripe CompanyIndirect evidence | 21 | |||
“TaxJar was founded in 2013 to help e-commerce companies automate the entire sales tax lifecycle from calculations and nexus tracking to reporting and filing.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 25 | neo.taxPartial evidence | 17 | |||
“Neo.Tax is building the easiest and most accurate tax filing and automation software.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 222 irs compliance software companies based in the United States
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Irs compliance software companies based in the United States at a glance
As of Sep 4, 2026Companies by employee count
Verified emails by last verification
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 irs compliance software companies, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United States whose own description of what they do matches “irs compliance software companies”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among irs compliance software companies, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
- 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 an evidence 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, 7,200 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 4, 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.
Frequently asked
How many irs compliance software companies are there based in the United States?
RevenueBase identified 222 irs compliance software companies headquartered in the United States 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 Atlanta, tops this list with the largest team on record.
Which city has the most irs compliance software companies?
New York leads with 7 headquartered companies, followed by Chicago (6) and Houston (5).
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 7,200 verified decision-maker contacts tracked across these 222 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 4, 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.
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