Company lists · Data refreshed September 2026

Top 25 Accounting process outsourcing firms based in the United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 5,505 companies tracked

RevenueBase identified 5,505 accounting process outsourcing firms headquartered in the United States as of September 2026 and tracks 29,853 professional contacts across them, including 8,775 with verified work emails. New York is the largest hub.

This list covers accounting process outsourcing firms 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 September 27, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 27, 2026 86% judged on-target in blind review

5,505Companies

29,853Contacts tracked

8,775Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest accounting process outsourcing firms based in the United States

Ranked by team size

Top 25 of 5,505 accounting process outsourcing firms based in the United States, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to accounting process outsourcing firms: 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	Personiv	Partial evidence	Austin, TX, United StatesHQ checked Sep 27, 2026	10001+	2,231 contacts →
	Partial evidence “OUR PEOPLE, YOUR PRIORITIES Streamline your finance & accounting team at 50% cost savings with a team as small as one.” Source: RevenueBase Database · checked Sep 27, 2026
2	Metriqe Solutions	Partial evidence	Irving, TX, United StatesHQ checked Sep 27, 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 27, 2026
3	Bennett Thrasher	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 27, 2026	201-500	558 contacts →
	Partial evidence “Bennett Thrasher provides proven guidance for financial confidence through premier tax, audit, advisory, and outsourcing solutions.” Source: RevenueBase Database · checked Sep 27, 2026
4	Supporting Strategies	Indirect evidence	Beverly, MA, United StatesHQ checked Sep 27, 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 27, 2026
5	Outsource Partners International Alumni	Strong evidence	New York, NY, United StatesHQ checked Sep 27, 2026	1,001-5,000	397 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 Sep 27, 2026
6	OHI	Strong evidence	New York, United StatesHQ checked Sep 27, 2026	201-500	339 contacts →
	Strong evidence “OHI is a specialized finance and real estate accounting outsourcing service provider with operations out of New Delhi (India) since 2006.” Source: RevenueBase Database · checked Sep 27, 2026
7	Makosi	Partial evidence	New York, NY, United StatesHQ checked Sep 27, 2026	201-500	324 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 Sep 27, 2026
8	Unison Globus	Strong evidence	Coral Springs, FL, United StatesHQ checked Sep 27, 2026	201-500	320 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 Sep 27, 2026
9	Montpac	Partial evidence	Granite Bay, CA, United StatesHQ checked Sep 27, 2026	201-500	298 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 Sep 27, 2026
10	SAPRO	Strong evidence	New York, NY, United StatesHQ checked Sep 27, 2026	501-1,000	252 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 Sep 27, 2026
11	TGG	Indirect evidence	San Antonio, TX, United StatesHQ checked Sep 27, 2026	51-200	249 contacts →
	Indirect evidence “The true performance of your business shouldn’t be a mystery.” Source: RevenueBase Database · checked Sep 27, 2026
12	Finadvantage	Partial evidence	Chicago, IL, United StatesHQ checked Sep 27, 2026	201-500	239 contacts →
	Partial evidence “FinAdvantage is a tech-powered boutique finance and accounting operations firm offering a full suite of services for over a decade.” Source: RevenueBase Database · checked Sep 27, 2026
13	Indinero	Indirect evidence	Los Angeles, United StatesHQ checked Sep 27, 2026	201-500	175 contacts →
	Indirect evidence “Indinero is on a mission to help every business realize its potential.” Source: RevenueBase Database · checked Sep 27, 2026
14	Infinity Globus, A Springline Company	Strong evidence	Dallas, TX, United StatesHQ checked Sep 27, 2026	201-500	168 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 Sep 27, 2026
15	Geffen Mesher	Partial evidence	Portland, OR, United StatesHQ checked Sep 27, 2026	51-200	160 contacts →
	Partial evidence “We’re a Portland-based accounting firm with a 90+ year legacy, and we’re continuing to grow and evolve every day.” Source: RevenueBase Database · checked Sep 27, 2026
16	Finsmart Accounting	Strong evidence	New York, NY, United StatesHQ checked Sep 27, 2026	51-200	155 contacts →
	Strong evidence “Accounting Outsourcing to Drive Growth for Global CPA Firms & MNCs.” Source: RevenueBase Database · checked Sep 27, 2026
17	Vertaccount	Strong evidence	Honolulu, HI, United StatesHQ checked Sep 27, 2026	51-200	134 contacts →
	Strong evidence “Vertaccount is a boutique Finance and Accounting Outsourcing provider with offices and affiliates in the United States, Australia, Singapore and the Philippines.” Source: RevenueBase Database · checked Sep 27, 2026
18	Cloudit Automation & Accounting Services LLC	Partial evidence	New York, NY, United StatesHQ checked Sep 27, 2026	201-500	130 contacts →
	Partial evidence “If you are running your own accounting and tax consulting practice, you must like this by all means.” Source: RevenueBase Database · checked Sep 27, 2026
19	Propio	Partial evidence	Seattle, WA, United StatesHQ checked Sep 27, 2026	n/a	130 contacts →
	Partial evidence “Propio is the all-in-one accounting platform that does the work.” Source: RevenueBase Database · checked Sep 27, 2026
20	Glocal Accounting	Partial evidence	Delaware, DE, United StatesHQ checked Sep 27, 2026	501-1,000	115 contacts →
	Partial evidence “Welcome to GLOCAL Accounting.” Source: RevenueBase Database · checked Sep 27, 2026
21	Boston Financial Advisory Group	Partial evidence	Monroeville, PA, United StatesHQ checked Sep 27, 2026	51-200	109 contacts →
	Partial evidence “Boston Financial Advisory Group is a one-stop-shop solution for all your Accounting and Financial consulting needs.” Source: RevenueBase Database · checked Sep 27, 2026
22	Crystalvoxx LLC Accounting Services	Partial evidence	Dallas, TX, United StatesHQ checked Sep 27, 2026	51-200	108 contacts →
	Partial evidence “CrystalVoxx offers a wide range of accounting and payroll services to suit diverse customer needs [Accounting & Payroll, EMR Integrated Transcription, Revenue Cycle Management,].” Source: RevenueBase Database · checked Sep 27, 2026
23	Indevia Accounting, INC	Partial evidence	Coronado, CA, United StatesHQ checked Sep 27, 2026	51-200	104 contacts →
	Partial evidence “Running a multi-unit franchise business is complex, your accounting shouldn’t be.” Source: RevenueBase Database · checked Sep 27, 2026
24	Pacific Accounting & Business Services INC	Partial evidence	Irving, TX, United StatesHQ checked Sep 27, 2026	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 Sep 27, 2026
25	Entigrity	Partial evidence	Sugar Land, TX, United StatesHQ checked Sep 27, 2026	1,001-5,000	95 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 Sep 27, 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 process outsourcing firms. 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 process outsourcing firms.
Partial evidence: Its own public description names part of accounting process outsourcing firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name accounting process outsourcing firms. 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 5,505 accounting process outsourcing firms based in the United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 8,775 reachable decision-makers.

Free signup · no credit card

View the full list →

Accounting process outsourcing firms based in the United States at a glance

As of Sep 27, 2026

29.4%Verified-email coverage

5.4Average contacts per company

1-10Median size (employees)

2.6%Largest-city concentration · New York

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

4,531

11-50

767

51-200

149

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 5,505 companies.

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 process outsourcing firms, 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 process outsourcing firms”. 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 process outsourcing firms), 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 process outsourcing firms, 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, 8,775 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 27, 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 process outsourcing firms 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 process outsourcing firms, 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 process outsourcing firms are there based in the United States?

RevenueBase identified 5,505 accounting process outsourcing firms 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?

Personiv, headquartered in Austin, tops this list with the largest team on record.

Which city has the most accounting process outsourcing firms?

New York leads with 145 headquartered companies, followed by Houston (99) and Los Angeles (92).

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 8,775 verified decision-maker contacts tracked across these 5,505 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 27, 2026.

Ready to reach these companies? Verified emails and direct dials for all 5,505 accounting process outsourcing firms based in the United States. Start with a free account, no credit card.

Download this list →

Related lists

Accounting process outsourcing firms by geography

Browse the directory

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.