Company lists · Data refreshed September 2026

Top 25 Accountancy outsourcing services based in Singapore

Name: Accountancy outsourcing services based in Singapore
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 152 companies tracked

RevenueBase identified 152 accountancy outsourcing services headquartered in Singapore as of September 2026 and tracks 1,933 professional contacts across them, including 386 with verified work emails. Singapore is the largest hub.

This list covers accountancy outsourcing services headquartered in Singapore, 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

152Companies

1,933Contacts tracked

386Verified emails

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

The 25 largest accountancy outsourcing services based in Singapore

Ranked by team size

Top 25 of 152 accountancy outsourcing services based in Singapore, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to accountancy outsourcing services: 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	OSOME	Partial evidence	Central Business District, SingaporeHQ checked Sep 21, 2026	201-500	457 contacts →
	Partial evidence “Expert accountants + simple software = financial admin, done.” Source: RevenueBase Database · checked Sep 21, 2026
2	Baker Tilly Singapore	Indirect evidence	SingaporeHQ checked Sep 21, 2026	201-500	372 contacts →
	Indirect evidence “Baker Tilly is a top 10 global professional services firm delivering accounting, corporate and financial advisory services across the business lifecycle.” Source: RevenueBase Database · checked Sep 21, 2026
3	Nexia Singapore PAC	Indirect evidence	SingaporeHQ checked Sep 21, 2026	51-200	126 contacts →
	Indirect evidence “Nexia Singapore is a public accounting (PAC) firm with a single purpose – we create long term value for our clients by meeting their needs at any point of their growth journey…” Source: RevenueBase Database · checked Sep 21, 2026
4	Ledgen	Indirect evidence	SingaporeHQ checked Sep 21, 2026	51-200	50 contacts →
	Indirect evidence “We are LEDGEN.” Source: RevenueBase Database · checked Sep 21, 2026
5	Agilience Asia	Partial evidence	SingaporeHQ checked Sep 21, 2026	11-50	38 contacts →
	Partial evidence “Professional service provider for Accounting and Business Process Outsourcing & Deal Advisory” Source: RevenueBase Database · checked Sep 21, 2026
6	Angel Services	Indirect evidence	SingaporeHQ checked Sep 21, 2026	n/a	38 contacts →
	Indirect evidence “We are corporate and accounting professionals who ensure your business is well recorded, regulated and reported.” Source: RevenueBase Database · checked Sep 21, 2026
7	Onestop Professional	Partial evidence	SingaporeHQ checked Sep 21, 2026	11-50	37 contacts →
	Partial evidence “About Us OneStop professional team has established its presence in the corporate community as a firm of Chartered Accountants with a sense of solving customers corporate business…” Source: RevenueBase Database · checked Sep 21, 2026
8	Singapore Corporate Services PTE LTD	Indirect evidence	SingaporeHQ checked Sep 21, 2026	11-50	36 contacts →
	Indirect evidence “Singapore based CPA firm with over 20 years of combined experience.” Source: RevenueBase Database · checked Sep 21, 2026
9	Accounting Superhero	Indirect evidence	SingaporeHQ checked Sep 21, 2026	11-50	36 contacts →
	Indirect evidence “Celebrating Our Journey Together \| 25 Years of Excellence Accounting X Technology X Advisory Finance and accounting services to support your Company, analyse operations and guide…” Source: RevenueBase Database · checked Sep 21, 2026
10	Heng LEE Seng LLP	Partial evidence	SingaporeHQ checked Sep 21, 2026	51-200	30 contacts →
	Partial evidence “We are a medium-sized firm of Chartered Accountants (CA) in practice for over the past 40 years.” Source: RevenueBase Database · checked Sep 21, 2026
11	CAP Advisory Group Pte. LTD	Indirect evidence	SingaporeHQ checked Sep 21, 2026	11-50	29 contacts →
	Indirect evidence “About CAP CAP is a full-fledged accounting firm for emerging brands and businesses, providing a range of professional services from corporate secretarial services, accounting and…” Source: RevenueBase Database · checked Sep 21, 2026
12	Eisneramper Singapore	Indirect evidence	SingaporeHQ checked Sep 21, 2026	51-200	28 contacts →
	Indirect evidence “At EisnerAmper Singapore, we create business, corporate solutions and provide advisory services.” Source: RevenueBase Database · checked Sep 21, 2026
13	Reanda Adept PAC	Indirect evidence	SingaporeHQ checked Sep 21, 2026	11-50	25 contacts →
	Indirect evidence “Reanda Adept PAC is a public accounting corporation incorporated with the Accounting and Corporate Regulatory Authority (ACRA) of Singapore.” Source: RevenueBase Database · checked Sep 21, 2026
14	Robert YAM & CO PAC	Partial evidence	SingaporeHQ checked Sep 21, 2026	51-200	22 contacts →
	Partial evidence “The firm of ROBERT YAM & CO PAC, with a history of more than 43 years, has been established in Singapore since the 1st of July 1977 as a firm of Chartered Accountants and…” Source: RevenueBase Database · checked Sep 21, 2026
15	OA Assurance PAC	Indirect evidence	SingaporeHQ checked Sep 21, 2026	11-50	22 contacts →
	Indirect evidence “Singapore based CPA firm with over 20 years of combined experience.” Source: RevenueBase Database · checked Sep 21, 2026
16	Tassure Group	Indirect evidence	SingaporeHQ checked Sep 21, 2026	11-50	15 contacts →
	Indirect evidence “Tassure Group is a top-notch public accounting firm in Singapore with a team of more than 30 qualified and dedicated professionals with the utmost integrity to provide a full…” Source: RevenueBase Database · checked Sep 21, 2026
17	Flexxo PTE LTD	Partial evidence	SingaporeHQ checked Sep 21, 2026	11-50	13 contacts →
	Partial evidence “FLEXXO - OUTSOURCING THAT EMPOWERS BUSINESS Accounting, taxation, audit, corporate secretary, human resources and payroll - we're here to support your business needs.” Source: RevenueBase Database · checked Sep 21, 2026
18	Unity Assurance PAC	Partial evidence	SingaporeHQ checked Sep 21, 2026	11-50	13 contacts →
	Partial evidence “Unity Assurance PAC is a Public Accounting Corporation with core expertise in audit and assurance, corporate and individual tax, business advisory and outsourcing services and…” Source: RevenueBase Database · checked Sep 21, 2026
19	Thong & LIM Chartered Accountants	Partial evidence	SingaporeHQ checked Sep 21, 2026	11-50	10 contacts →
	Partial evidence “Established in 1984, Thong & Lim is a partnership of highly trained and experienced chartered accountants and professionals.” Source: RevenueBase Database · checked Sep 21, 2026
20	Aura Partners Singapore PTE LTD	Indirect evidence	SingaporeHQ checked Sep 21, 2026	51-200	10 contacts →
	Indirect evidence “Recognized for its expertise and experience from the top 4 international accounting firms, Aura Partners Singapore is a leading accounting firm in Singapore.” Source: RevenueBase Database · checked Sep 21, 2026
21	IAN & SON LLP	Indirect evidence	SingaporeHQ checked Sep 21, 2026	11-50	10 contacts →
	Indirect evidence “I&S is a thought-leading professional and accounting services firm with an in-depth focus in the SME space in Singapore.” Source: RevenueBase Database · checked Sep 21, 2026
22	U Ventures Pte. LTD	Indirect evidence	SingaporeHQ checked Sep 21, 2026	11-50	9 contacts →
	Indirect evidence “U Ventures is an established company consisting of a team of young professionals.” Source: RevenueBase Database · checked Sep 21, 2026
23	Onemillennium PAC	Partial evidence	SingaporeHQ checked Sep 21, 2026	11-50	9 contacts →
	Partial evidence “ONEMillennium PAC is an accountancy firm delivering traditional accounting services combined with strategic commercial thinking.” Source: RevenueBase Database · checked Sep 21, 2026
24	BZE Accounting	Indirect evidence	SingaporeHQ checked Sep 21, 2026	1-10	7 contacts →
	Indirect evidence “Specialising in Accounting, Book-Keeping, Secretarial Services, Tax, Company Incorporation Services and more.” Source: RevenueBase Database · checked Sep 21, 2026
25	P & W Consulting	Indirect evidence	SingaporeHQ checked Sep 21, 2026	1-10	7 contacts →
	Indirect evidence “P&W Consulting is a professional accounting firm incorporated in Singapore.” 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: accountancy outsourcing services. 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 accountancy outsourcing services.
Partial evidence: Its own public description names part of accountancy outsourcing services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name accountancy outsourcing services. 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 152 accountancy outsourcing services based in Singapore

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 386 reachable decision-makers.

Free signup · no credit card

View the full list →

Accountancy outsourcing services based in Singapore at a glance

As of Sep 21, 2026

20.0%Verified-email coverage

12.7Average contacts per company

1-10Median size (employees)

90.1%Largest-city concentration · Singapore

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Email recency for this list is measured worldwide rather than for Singapore, so it is reported there. Company counts and contact totals on this page are exact for Singapore, over 152 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 accountancy outsourcing services, 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 Singapore whose own description of what they do matches “accountancy outsourcing services”. 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 accountancy outsourcing services), 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 accountancy outsourcing services, and records with no verified work email. Companies headquartered outside Singapore 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, 386 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.

Accountancy outsourcing services by metro

Accountancy outsourcing services in Singapore137

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 accountancy outsourcing services, 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 accountancy outsourcing services are there based in Singapore?

RevenueBase identified 152 accountancy outsourcing services headquartered in Singapore 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?

OSOME, headquartered in Singapore, tops this list with the largest team on record.

Which city has the most accountancy outsourcing services?

Singapore leads with 137 headquartered companies, followed by Downtown Core (4) and Bishan (1).

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 386 verified decision-maker contacts tracked across these 152 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.

Ready to reach these companies? Verified emails and direct dials for all 152 accountancy outsourcing services based in Singapore. Start with a free account, no credit card.

Download this list →

Related lists

Accountancy outsourcing services 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.