Company lists · Data refreshed September 2026

Top 25 Professional services firms based in Ireland

Name: Professional services firms based in Ireland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 400 companies tracked

RevenueBase identified 400 company matches for professional services firms associated with Ireland as of September 2026 and tracks 9,174 professional contacts across them, including 4,870 with verified work emails and 244 with mobile numbers. Dublin is the largest hub.

This list covers company matches for professional services firms associated with Ireland, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 5, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 5, 2026 How this list was built

400Companies

9,174Contacts tracked

4,870Verified emails

244Mobile numbers

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The 25 largest professional services firms based in Ireland

Ranked by team size

Top 25 of 400 company matches for professional services firms based in Ireland, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 5, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Kpmg Ireland	Exact match	Dublin 2, IrelandHQ recorded Sep 5, 2026	1,001-5,000	2,952 contacts →
	Exact match “KPMG is a leading provider of professional services, offering a range of audit, tax and advisory services to a broad range of domestic and international clients across all sectors…” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
2	Grant Thornton Ireland	Exact match	Dublin, IrelandHQ recorded Sep 5, 2026	1,001-5,000	2,374 contacts →
	Exact match “In Ireland, Grant Thornton Ireland and Grant Thornton Corporate Finance Limited (and their respective subsidiary/affiliate entities) operate under an alternative practice…” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
3	BDO Ireland	Exact match	Dublin, IrelandHQ recorded Sep 5, 2026	201-500	521 contacts →
	Exact match “BDO Ireland LLP is an accountancy and business advisory firm that provides Audit, Tax, Deals, and Consulting, Risk & Outsourcing (CR & O) services to entrepreneurial, growing and…” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
4	Crowleysdfk	Exact match	Dublin 2, IrelandHQ recorded Sep 5, 2026	51-200	129 contacts →
	Exact match “At Crowleys DFK we believe in creating value for our clients.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
5	Eisneramper Ireland	Exact match	Dublin 18, IrelandHQ recorded Sep 5, 2026	51-200	119 contacts →
	Exact match “One brand.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
6	OSK	Exact match	Dublin, IrelandHQ recorded Sep 5, 2026	11-50	78 contacts →
	Exact match “OSK have been providing quality and professional business advice to Irish businesses since 1985.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
7	BDO Limerick	Exact match	Limerick, IrelandHQ recorded Sep 5, 2026	51-200	75 contacts →
	Exact match “BDO is the only multi-disciplined, “relationship based” accountancy firm focusing on entrepreneurial and growing businesses in Ireland.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
8	Baker Tilly Ireland	Exact match	Cork, IrelandHQ recorded Sep 5, 2026	51-200	74 contacts →
	Exact match “At Baker Tilly, we care about you and the impact you make.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
9	Cronin & Company	Exact match	Terenure, IrelandHQ recorded Sep 5, 2026	11-50	74 contacts →
	Exact match “Cronin & Company was established in 1978 by Michael Cronin.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
10	Strata Financial	Exact match	Dublin 2, IrelandHQ recorded Sep 5, 2026	51-200	74 contacts →
	Exact match “Strata Financial provides a full suite of all accounting, auditing, tax, management, and compliance services.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
11	HLB Ireland	Exact match	Dublin, IrelandHQ recorded Sep 5, 2026	51-200	70 contacts →
	Exact match “HLB Ireland provide quality accountancy services and business advice to entrepreneurial and owner managed businesses.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
12	UHY Farrelly Dawe White Limited	Exact match	Dundalk, IrelandHQ recorded Sep 5, 2026	51-200	68 contacts →
	Exact match “UHY FDW is a leading audit, tax and advisory practice in Ireland, driven to achieve a better future together, for our people, our clients and our communities.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
13	CSG	Exact match	Tralee, IrelandHQ recorded Sep 5, 2026	11-50	60 contacts →
	Exact match “Welcome to CSG, a leading accountancy firm in Ireland providing professional services to businesses of all sizes.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
14	MHP Sellors	Exact match	Limerick, IrelandHQ recorded Sep 5, 2026	11-50	52 contacts →
	Exact match “MHP Sellors LLP is the largest dual-county legal team in the Mid-West region formed by merger of award winning law firms MHP Solicitors & Sellors and has the expertise and…” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
15	O'neill Foley	Exact match	Kilkenny, IrelandHQ recorded Sep 5, 2026	51-200	48 contacts →
	Exact match “O’Neill Foley is the largest independent firm of Chartered Accountants in the South East of Ireland and we’ve been helping businesses grow since 1958.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
16	Walsh O'brien Harnett	Exact match	Dublin 2, IrelandHQ recorded Sep 5, 2026	11-50	45 contacts →
	Exact match “Based in Dublin, Walsh O’Brien Harnett is one of Ireland’s top 20 professional advisory firms offering a wide range of accounting, audit, tax, advisory and corporate services.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
17	Noone Casey	Exact match	Dublin 2, IrelandHQ recorded Sep 5, 2026	11-50	42 contacts →
	Exact match “Noone Casey is a Dublin based Accountancy & Advisory firm.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
18	Gilroy Gannon Chartered Accountants	Exact match	Sligo, IrelandHQ recorded Sep 5, 2026	51-200	41 contacts →
	Exact match “Gilroy Gannon brings to its clients a unique partnership - people drawn together from the major international accounting firms, industry and small practice with the common goal of…” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
19	Malone & CO	Exact match	Dublin, IrelandHQ recorded Sep 5, 2026	51-200	40 contacts →
	Exact match “At Malone & Co, we go beyond the numbers.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
20	MBSL	Exact match	Dundrum, IrelandHQ recorded Sep 5, 2026	11-50	34 contacts →
	Exact match “MBSL is a firm of chartered accountants specialising in outsourced accounting.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
21	Nathan Trust B Corp	Exact match	Cork City, IrelandHQ recorded Sep 5, 2026	11-50	31 contacts →
	Exact match “At Nathan Trust, we go beyond company formation.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
22	Dbass Accountancy & TAX Advisory	Exact match	Ashbourne, IrelandHQ recorded Sep 5, 2026	11-50	30 contacts →
	Exact match “DBASS are a medium sized chartered accountancy firm based in Leinster, which has been delivering a broad range of accountancy and business advisory services to our clients for…” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
23	Kieran Ryan & CO	Exact match	Dublin 2, IrelandHQ recorded Sep 5, 2026	11-50	27 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
24	Westboro Partners	Exact match	Cork, IrelandHQ recorded Sep 5, 2026	11-50	27 contacts →
	Exact match “Business & Financial Advisers Established in 1983, Westboro leads the market in advising entrepreneurial, growth oriented businesses.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
25	Leonard & Company	Exact match	Rathfarnham, IrelandHQ recorded Sep 5, 2026	1-10	26 contacts →
	Exact match “Leonard & Company of Rathfarnham, Dundrum, South Dublin, is a multidisciplinary professional services accountancy practice that is committed to providing a comprehensive range of…” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “professional services firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 400 professional services firms based in Ireland

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Professional services firms based in Ireland at a glance

As of Sep 5, 2026

53.1%Verified-email coverage

2.7%Mobile-number coverage

22.9Average contacts per company

1-10Median size (employees)

13.8%Largest-city concentration · Dublin

Sep 5, 2026Page data refreshed

Companies by employee count

1-10

231

11-50

138

51-200

201-500

1,001-5,000

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

4,5830–30

26231–60

161–90

090–180

24180+

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with Ireland whose business descriptions match “professional services firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 4,870 professional contacts with verified work emails across the full matched dataset. 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 5, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Professional services firms by metro

Professional services firms in Dublin55

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “professional services firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many professional services firms are there based in Ireland?

RevenueBase identified 400 company matches for professional services firms associated with Ireland as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Kpmg Ireland tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most professional services firms?

Dublin leads with 55 company records, followed by Cork (23) and Limerick (17).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 4,870 professional contacts with verified work emails tracked across these 400 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 5, 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 SmartSearch, 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.