Company lists · Data refreshed September 2026
Top 25 Accounting back office outsourcing companies based in the United States
RevenueBase identified 6,816 accounting back office outsourcing companies headquartered in the United States as of September 2026 and tracks 44,964 professional contacts across them, including 10,914 with verified work emails. New York is the largest hub.
This list covers accounting back office 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 September 21, 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.
The 25 largest accounting back office outsourcing companies based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,237 contacts → | ||||
Indirect evidence “SEBPO transforms operational complexity into a seamless, strategic advantage.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 913 contacts → | ||||
Indirect evidence “B Consulting provides a plug-and-play financial operations team for high-growth startups.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 676 contacts → | ||||
Strong evidence “Data Entry Solution is one of the leading back office solution providers based in California.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 571 contacts → | ||||
Partial evidence “Founded in 2007, Metriqe Solutions started out as a Hotel Accounting firm in USA.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 6 | 496 contacts → | ||||
Strong evidence “Crane Consulting & Outsourcing (CCO) is a global provider of back-office support services to a myriad of financial service organizations.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 447 contacts → | ||||
Indirect evidence “Velan Info Services is a leading multidisciplinary service provider with its clients across the globe.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 9 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 367 contacts → | ||||
Indirect evidence “If you’re like us, you’re in business to do what you love, build great products, teams, and customer relationships.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 13 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 249 contacts → | ||||
Indirect evidence “The true performance of your business shouldn’t be a mystery.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 16 | 187 contacts → | ||||
Partial evidence “We are a leading global outsourcing services company with highly skilled professionals working for our clients and partners.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 17 | 182 contacts → | ||||
Indirect evidence “Providing bookkeeping functions for oil and gas operator, investor, and royalty management entities.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 18 | 179 contacts → | ||||
Indirect evidence “On May 1, 2026, NeoSystems Enterprise Solutions Group (ESG) was acquired by BlueStreet Solutions Inc.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 175 contacts → | ||||
Indirect evidence “Indinero is on a mission to help every business realize its potential.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 20 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 21 | 162 contacts → | ||||
Partial evidence “Virrtue is a leading finance and accounting business process services team focused on delivering transformational financial outcomes to our customers.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 22 | 160 contacts → | ||||
Partial evidence “Countsy provides outsourced Accounting, HR/People Operations, Equity Administration, FP & A, and more for startups, scaleups, and spinouts.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 155 contacts → | ||||
Strong evidence “Accounting Outsourcing to Drive Growth for Global CPA Firms & MNCs.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 149 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 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 21, 2026Thanks. The Data Team will review it. | |||||
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 back office 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 back office outsourcing companies.
- Partial evidence
- Its own public description names part of accounting back office 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 back office 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 6,816 accounting back office outsourcing companies based in the United States
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Accounting back office outsourcing companies based in the United States at a glance
As of Sep 21, 2026Companies by employee count
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 6,816 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 back office 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 back office 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 back office 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 back office 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, 10,914 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 21, 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 back office outsourcing companies by metro
- Accounting back office outsourcing companies in New York165
- Accounting back office outsourcing companies in Houston124
- Accounting back office outsourcing companies in Los Angeles105
- Accounting back office outsourcing companies in Austin93
- Accounting back office outsourcing companies in Atlanta74
- Accounting back office outsourcing companies in Dallas72
- Accounting back office outsourcing companies in Miami71
- Accounting back office outsourcing companies in San Diego68
- Accounting back office outsourcing companies in Chicago66
- Accounting back office outsourcing companies in Denver59
- Accounting back office outsourcing companies in Las Vegas46
- Accounting back office outsourcing companies in San Antonio44
- Accounting back office outsourcing companies in Phoenix43
- Accounting back office outsourcing companies in Tampa43
- Accounting back office outsourcing companies in Orlando42
- Accounting back office outsourcing companies in San Francisco42
- Accounting back office outsourcing companies in Sheridan40
- Accounting back office outsourcing companies in Portland39
- Accounting back office outsourcing companies in Seattle37
- Accounting back office outsourcing companies in Charlotte36
- Accounting back office outsourcing companies in Raleigh29
- Accounting back office outsourcing companies in Washington28
- Accounting back office outsourcing companies in Boston27
- Accounting back office outsourcing companies in Salt Lake City27
- Accounting back office outsourcing companies in Wilmington27
- Accounting back office outsourcing companies in Irvine25
- Accounting back office outsourcing companies in Minneapolis25
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 back office 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 back office outsourcing companies are there based in the United States?
RevenueBase identified 6,816 accounting back office outsourcing 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?
Personiv, headquartered in Austin, tops this list with the largest team on record.
Which city has the most accounting back office outsourcing companies?
New York leads with 165 headquartered companies, followed by Houston (124) and Los Angeles (105).
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 10,914 verified decision-maker contacts tracked across these 6,816 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 21, 2026.
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Accounting back office outsourcing companies by geography
- Accounting back office outsourcing companies based in Brazil
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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.
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