Company lists · Data refreshed August 2026

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

There are 277 accounting services outsourcing companies headquartered in New York, United States (RevenueBase, August 2026). RevenueBase tracks 3,086 professional contacts across them, including 839 with verified work emails and 559 with mobile numbers. New York is the largest hub.

This list covers accounting services 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, how directly it supports the match, and when it was last checked. Data refreshed August 30, 2026.

277Companies
3,086Contacts tracked
839Verified emails
559Mobile numbers
Unlock all 277 companies Free account · no credit card · 2 minutes

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

Ranked by team size
Top 25 of 277 accounting services outsourcing companies based in New York, United States, ranked by team size, largest first. Data refreshed Aug 30, 2026. Evidence rates how directly each company's own description names accounting services outsourcing companies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContactsVerified emails
1

“Outsource Partners International (OPI) is a professional services firm dedicated to the outsourcing of finance, accounting, and analytics business processes.”

Source: company website · checked Aug 30, 2026
New York, NY, United States1,001-5,0003986
2
MakosiPartial 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: company website · checked Aug 30, 2026
New York, NY, United States201-500340125
3
SAPROStrong evidence

“SAPRO is a global, tech-enabled talent outsourcing firm specializing in Assurance, Tax, Advisory, and Client Accounting Services (CAS).”

Source: company website · checked Aug 30, 2026
New York, NY, United States501-1,00025980
4
WilkinguttenplanIndirect evidence
Source: company website · checked Aug 30, 2026
New York, NY, United States51-200169131
5
Mindspace OutsourcingStrong evidence

“Mindspace Outsourcing, established in 2007, and offers bookkeeping outsourcing and accounting services to individuals and small to medium-sized businesses in the United States…”

Source: company website · checked Aug 30, 2026
New York, NY, United States51-2001552
6
SourceinPartial evidence

“SourceIN helps global businesses build finance and accounting operations they can trust.”

Source: company website · checked Aug 30, 2026
New York, NY, United States201-50014380
7

“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: company website · checked Aug 30, 2026
New York, NY, United States51-200926
8
BTQ FinancialIndirect 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: company website · checked Aug 30, 2026
New York, NY, United States51-2008739
9
Fasten Halberstam LLPPartial evidence

“Fasten Halberstam LLP is a full service accounting firm offering a broad range of services for a diversified clientele representing a variety of industries.”

Source: company website · checked Aug 30, 2026
New York, NY, United States51-2007449
10
Karma CPA Services LLPPartial evidence

“Our accounting team utilizes online technology to help scale up your business by managing your Bookkeeping and Accounting, with a personalized touch.”

Source: company website · checked Aug 30, 2026
New York, United States51-200642
11

“We offer a wide range of custom accounting, bookkeeping and consulting services: Tax Accounting Services, Bookkeeping, Consulting Services, Payroll, Report Generation, QuickBooks…”

Source: company website · checked Aug 30, 2026
New York, NY, United States51-2006319
12

“We take the complication out of any business.”

Source: company website · checked Aug 30, 2026
New York, NY, United States201-5006141
13
Unloop AccountingPartial evidence

“Unloop is the first and only accounting firm exclusively servicing ecommerce and inventory businesses in the US and Canada.”

Source: company website · checked Aug 30, 2026
New York, NY, United States11-50432
14
SMGPartial evidence

“SMG ABA LLC - Accountants, Bookkeepers & Advisors provide provide innovative tax and accounting services to diverse businesses and individuals.”

Source: company website · checked Aug 30, 2026
New York, NY, United States11-503919
15
Caroprese & CompanyStrong evidence

“Caroprese & Company is a strategic certified public accounting firm delivering tailored accounting, tax, advisory, and business process outsourcing solutions that help businesses…”

Source: company website · checked Aug 30, 2026
New York, NY, United States11-502918
16
The RMG GroupPartial evidence

“The RMG Group provides comprehensive internal accounting support for small to mid-market businesses, startups, entrepreneurs, and sole proprietors.”

Source: company website · checked Aug 30, 2026
New York, NY, United States11-502515
17
Mighty Digits AccountingPartial evidence

“We help great businesses get their Finance & Accounting in order.”

Source: company website · checked Aug 30, 2026
New York, NY, United States11-502310
18
K9 BookkeepingIndirect 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: company website · checked Aug 30, 2026
New York, NY, United States51-200193
19
Ursa ConsultantsIndirect evidence

“Working with Ursa Consultants is more than a partnership.”

Source: company website · checked Aug 30, 2026
New York, NY, United States11-501812
20
ProfitlinePartial 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: company website · checked Aug 30, 2026
New York, NY, United States11-50117
21
QMK ConsultingIndirect evidence

“QMK Consulting, LLC is a professional services firm, our main headquarters is located at 401 Park Avenue South 10th floor NY 10016.”

Source: company website · checked Aug 30, 2026
New York, NY, United States11-50115
22
HammockIndirect evidence

“At Hammock, we believe entrepreneurs and business owners prefer finance services that are simple, insightful, and supported by data.”

Source: company website · checked Aug 30, 2026
New York, NY, United States11-50106
23
Shay CPA P.CIndirect evidence
Source: company website · checked Aug 30, 2026
New York, NY, United States11-5087
24
Relig Solutions INCIndirect evidence

“RELIG is an abbreviation of the word Religion.”

Source: company website · checked Aug 30, 2026
New York, NY, United States201-50074
25

“Since 1969, Pace Accounting has helped clients with all their bookkeeping, payroll, and tax needs-personal and business.”

Source: company website · checked Aug 30, 2026
New York, United States11-5074

Showing 25 of 277 accounting services outsourcing companies based in New York, United States

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

As of Aug 30, 2026
1-10Median size (employees)
New YorkLargest hub · 277 HQs
559Contacts with mobile numbers
Aug 30, 2026Data refreshed

Companies by employee count

1-10
179
11-50
65
51-200
22
201-500
5
501-1,000
1
1,001-5,000
1

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 evidence rating on every row are there so you can check each match yourself.

Source
The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
What qualifies
Companies headquartered in New York, 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.
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 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 an evidence rating so you can judge each match yourself.
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, 839 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.

Frequently asked

How many accounting services outsourcing companies are there based in New York, United States?

There are 277 accounting services outsourcing companies headquartered in New York, United States as of August 2026 (RevenueBase).

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 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 839 verified decision-maker contacts tracked across these 277 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 contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.