Company lists · Data refreshed September 2026

Top 25 Accounting back office outsourcing companies based in New York, United States

Name: Accounting back office outsourcing companies based in New York, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 165 companies tracked

RevenueBase identified 165 accounting back office outsourcing companies headquartered in New York, United States as of September 2026 and tracks 2,482 professional contacts across them, including 586 with verified work emails. New York is the largest hub.

This list covers accounting back office outsourcing companies headquartered in New York, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 21, 2026 86% judged on-target in blind review

165Companies

2,482Contacts tracked

586Verified emails

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The 25 largest accounting back office outsourcing companies based in New York, United States

Ranked by team size

Top 25 of 165 accounting back office outsourcing companies based in New York, United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to accounting back office 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	Outsource Partners International Alumni	Strong evidence	New York, NY, United StatesHQ checked Sep 21, 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 21, 2026
2	OHI	Strong evidence	New York, United StatesHQ checked Sep 21, 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 21, 2026
3	Finsmart Accounting	Strong evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	155 contacts →
	Strong evidence “Accounting Outsourcing to Drive Growth for Global CPA Firms & MNCs.” Source: RevenueBase Database · checked Sep 21, 2026
4	Capactix Business Solutions	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	92 contacts →
	Partial evidence “We are one of the leading offshore companies that offer the best in the industry staffing solutions to CPAs, accounting firms, and other companies.” Source: RevenueBase Database · checked Sep 21, 2026
5	BTQ Financial	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	88 contacts →
	Indirect evidence “Consero Global Acquires BTQ Financial, Expanding Its Reach to the Non-Profit World With a Leading Provider of Finance as a Service to the Sector.” Source: RevenueBase Database · checked Sep 21, 2026
6	Karma CPA Services LLP	Partial evidence	New York, United StatesHQ checked Sep 21, 2026	51-200	64 contacts →
	Partial evidence “Our accounting team utilizes online technology to help scale up your business by managing your Bookkeeping and Accounting, with a personalized touch.” Source: RevenueBase Database · checked Sep 21, 2026
7	Crsp Connect	Strong evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	62 contacts →
	Strong evidence “Welcome to CRSP Connect, your trusted partner in outsourcing and offshore staffing solutions, tailored for Certified Public Accountants, Enrolled Agents, accounting firms, and…” Source: RevenueBase Database · checked Sep 21, 2026
8	Better Accounting Solutions	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	62 contacts →
	Partial evidence “We offer a wide range of custom accounting, bookkeeping and consulting services: Tax Accounting Services, Bookkeeping, Consulting Services, Payroll, Report Generation, QuickBooks…” Source: RevenueBase Database · checked Sep 21, 2026
9	Sourcedesk Global Private Limited	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	201-500	58 contacts →
	Indirect evidence “We take the complication out of any business.” Source: RevenueBase Database · checked Sep 21, 2026
10	Nexfirm	Strong evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	43 contacts →
	Strong evidence “NexFirm provides outsourced back office services to small and midsized law firms.” Source: RevenueBase Database · checked Sep 21, 2026
11	Unloop Accounting	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	43 contacts →
	Partial evidence “Unloop is the first and only accounting firm exclusively servicing ecommerce and inventory businesses in the US and Canada.” Source: RevenueBase Database · checked Sep 21, 2026
12	Nyctaxguys, INC	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	n/a	42 contacts →
	Partial evidence “We provide individuals and small businesses with professional accounting services.” Source: RevenueBase Database · checked Sep 21, 2026
13	Caroprese & Company	Strong evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	31 contacts →
	Strong evidence “Caroprese & Company is a strategic certified public accounting firm delivering tailored accounting, tax, advisory, and business process outsourcing solutions that help businesses…” Source: RevenueBase Database · checked Sep 21, 2026
14	Nongmin Consultancy Services Hirencs	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	31 contacts →
	Partial evidence “Nongmin Consultancy Services (HireNCS) is a trusted partner for small and medium businesses, offering expert accounting & bookkeeping services.” Source: RevenueBase Database · checked Sep 21, 2026
15	The RMG Group	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	24 contacts →
	Partial evidence “The RMG Group provides comprehensive internal accounting support for small to mid-market businesses, startups, entrepreneurs, and sole proprietors.” Source: RevenueBase Database · checked Sep 21, 2026
16	Mighty Digits Accounting	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	23 contacts →
	Partial evidence “We help great businesses get their Finance & Accounting in order.” Source: RevenueBase Database · checked Sep 21, 2026
17	Ursa Consultants	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	19 contacts →
	Indirect evidence “Working with Ursa Consultants is more than a partnership.” Source: RevenueBase Database · checked Sep 21, 2026
18	K9 Bookkeeping	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	19 contacts →
	Indirect evidence “There's a reason so many people are choosing to scuttle their billing departments and move to a virtual bookkeeping solution: it's more efficient and cost effective.” Source: RevenueBase Database · checked Sep 21, 2026
19	Empire TAX Professionals	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1-10	17 contacts →
	Indirect evidence “Here at Empire Tax Professionals, we care about your wealth.” Source: RevenueBase Database · checked Sep 21, 2026
20	Profitline	Strong evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	11 contacts →
	Strong evidence “The Profit Line is a leading bookkeeping firm in NYC, specializing in outsourced bookkeeping, accounting, back office & controller services to small businesses and nonprofits.” Source: RevenueBase Database · checked Sep 21, 2026
21	Applied Fund Solutions, LLC	Strong evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1-10	11 contacts →
	Strong evidence “Applied Fund Solutions (AFS) provides CFO, shadow accounting, middle- and back-office solutions to alternative investment funds.” Source: RevenueBase Database · checked Sep 21, 2026
22	Cubepros	Strong evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	10 contacts →
	Strong evidence “Cubepros is a cloud-based back office services firm for small businesses.” Source: RevenueBase Database · checked Sep 21, 2026
23	Hammock	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	10 contacts →
	Indirect evidence “At Hammock, we believe entrepreneurs and business owners prefer finance services that are simple, insightful, and supported by data.” Source: RevenueBase Database · checked Sep 21, 2026
24	AJOY	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1-10	10 contacts →
	Partial evidence “At AJOY, we believe accounting, tax preparation, payroll and financial management don’t have to be a hassle.” Source: RevenueBase Database · checked Sep 21, 2026
25	Financeplususa	Strong evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	9 contacts →
	Strong evidence “FinanceplusUSA is WPP’s internal Financial Shared Service organization, providing transactional back-office financial services to WPP companies in the US.” Source: RevenueBase Database · checked Sep 21, 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 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 165 accounting back office outsourcing companies based in New York, United States

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Accounting back office outsourcing companies based in New York, United States at a glance

As of Sep 21, 2026

23.6%Verified-email coverage

15.0Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · New York

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for New York, so it is reported there. Company counts and contact totals on this page are exact for New York, over 165 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 New York, 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 New York 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, 586 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 in the United States

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 New York, United States?

RevenueBase identified 165 accounting back office outsourcing companies headquartered in New York, 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?

Outsource Partners International Alumni, headquartered in New York, 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 586 verified decision-maker contacts tracked across these 165 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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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.