Company lists · Data refreshed August 2026

Top 25 Accounting services outsourcing companies based in the United States

Name: Accounting services outsourcing companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Aug 30, 2026 12,216 companies tracked

RevenueBase identified 12,216 accounting services outsourcing companies headquartered in the United States as of August 2026 and tracks 57,585 professional contacts across them, including 18,423 with verified work emails and 18,541 with mobile numbers. New York is the largest hub.

This list covers accounting services outsourcing 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed August 30, 2026.

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

12,216Companies

57,585Contacts tracked

18,423Verified emails

18,541Mobile numbers

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The 25 largest accounting services outsourcing companies based in the United States

Ranked by team size

Top 25 of 12,216 accounting services outsourcing companies based in the United States, 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	Pacific Group Of Companies	Partial evidence	Irvine, CA, United States	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
2	KMK	Partial evidence	Los Angeles, CA, United States	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
3	Metriqe Solutions	Partial evidence	Irving, TX, United States	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
4	Bennett Thrasher	Partial evidence	Denver, CO, United States	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
5	NOW CFO	Indirect evidence	Fresno, CA, United States	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
6	Outsource Partners International Alumni	Strong evidence	New York, NY, United States	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
7	Bench Accounting By Mainstreet	Indirect evidence	San Francisco, CA, United States	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
8	Advantage ONE TAX Consulting	Indirect evidence	Sterling, VA, United States	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
9	Makosi	Partial evidence	New York, NY, United States	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
10	Unison Globus	Strong evidence	Coral Springs, FL, United States	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
11	Montpac	Partial evidence	Granite Bay, CA, United States	201-500	294 contacts →
	Partial evidence “Montgomery Pacific Corporation (MontPac) is an outsourced accounting and financial management firm with personnel in the US, UK, and the Philippines.” Source: RevenueBase Database · checked Aug 30, 2026
12	Mayatax	Indirect evidence	Houston, TX, United States	501-1,000	268 contacts →
	Indirect evidence “Most growing businesses aren’t losing money because of revenue, they’re losing it through inefficient tax structures, missed credits, operational inefficiencies, and a lack of…” Source: RevenueBase Database · checked Aug 30, 2026
13	SAPRO	Strong evidence	New York, NY, United States	501-1,000	259 contacts →
	Strong evidence “SAPRO is a global, tech-enabled talent outsourcing firm specializing in Assurance, Tax, Advisory, and Client Accounting Services (CAS).” Source: RevenueBase Database · checked Aug 30, 2026
14	Oremus Corporate Services	Partial evidence	Crawfordsville, IN, United States	201-500	258 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 Aug 30, 2026
15	TJT	Indirect evidence	Wilmington, NC, United States	201-500	229 contacts →
	Indirect evidence “Thomas, Judy and Tucker, P.A.” Source: RevenueBase Database · checked Aug 30, 2026
16	Larson Gross	Partial evidence	Yakima, WA, United States	201-500	183 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 Aug 30, 2026
17	Indinero	Indirect evidence	Los Angeles, United States	201-500	179 contacts →
	Indirect evidence “Indinero is on a mission to help every business realize its potential.” Source: RevenueBase Database · checked Aug 30, 2026
18	Infinity Globus, A Springline Company	Strong evidence	Dallas, TX, United States	201-500	173 contacts →
	Strong evidence “Infinity Globus, a Springline company, is a leading accounting outsourcing firm with over two decades of industry experience, providing tailored taxation and accounting services…” Source: RevenueBase Database · checked Aug 30, 2026
19	Siglo BPO	Partial evidence	Miami, FL, United States	501-1,000	151 contacts →
	Partial evidence “Outsourcing estratégico para empresas globales Siglo BPO cuenta con presencia en más de 14 países, más de 27 años ayudando a empresas a optimizar sus procesos y mejorar su…” Source: RevenueBase Database · checked Aug 30, 2026
20	Meru Accounting	Partial evidence	Ocala, FL, United States	201-500	149 contacts →
	Partial evidence “Meru Accounting is the Accounting firm running under the leadership of CA Rushabh Shah and CA Harnish Shah providing accounting and bookkeeping services across Australia, US…” Source: RevenueBase Database · checked Aug 30, 2026
21	Mize Cpas INC	Partial evidence	Topeka, KS, United States	1,001-5,000	143 contacts →
	Partial evidence “Mize CPAs is now part of Aprio, a Top 25 premier, full-service business advisory and accounting firm that’s passionate for what’s next.” Source: RevenueBase Database · checked Aug 30, 2026
22	Sourcein	Partial evidence	New York, NY, United States	201-500	143 contacts →
	Partial evidence “SourceIN helps global businesses build finance and accounting operations they can trust.” Source: RevenueBase Database · checked Aug 30, 2026
23	Glocal Accounting	Partial evidence	Delaware, DE, United States	501-1,000	115 contacts →
	Partial evidence “Welcome to GLOCAL Accounting.” Source: RevenueBase Database · checked Aug 30, 2026
24	Pacific Accounting & Business Services INC	Partial evidence	Irvine, CA, United States	1,001-5,000	97 contacts →
	Partial evidence “Anand Tated a seasoned chartered accountant and the CEO of Pacific Accounting & Business Services (PABS) started PABS with his vision to customize modern solutions and deliver…” Source: RevenueBase Database · checked Aug 30, 2026
25	Entigrity	Partial evidence	Sugar Land, TX, United States	1,001-5,000	97 contacts →
	Partial evidence “As a leading solutions provider for more than 850 CPAs and Accounting firms, Entigrity specializes in building offshore teams, offering M&A advisory, coaching, and partnering with…” 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 12,216 accounting services outsourcing companies based in the United States

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Accounting services outsourcing companies based in the United States at a glance

As of Aug 30, 2026

32.0%Verified-email coverage

32.2%Mobile-number coverage

4.7Average contacts per company

1-10Median size (employees)

2.3%Largest-city concentration · New York

Aug 30, 2026Page data refreshed

Companies by employee count

1-10

9,804

11-50

1,919

51-200

301

201-500

501-1,000

1,001-5,000

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.
What qualifies: Companies headquartered in the United States 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. 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 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, 18,423 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 metro

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 based in the United States?

RevenueBase identified 12,216 accounting services outsourcing companies headquartered in the United States 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?

Pacific Group Of Companies, headquartered in Irvine, tops this list with the largest team on record.

Which city has the most accounting services outsourcing companies?

New York leads with 277 headquartered companies, followed by Houston (209) and Los Angeles (164).

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 18,423 verified decision-maker contacts tracked across these 12,216 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.