Company lists · Data verified August 2026

Top 25 Custom software development agencies based in Ireland

Name: Custom software development agencies based in Ireland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 162 companies tracked

There are 162 custom software development agencies headquartered in Ireland (RevenueBase, August 2026). RevenueBase tracks 1,046 professional contacts across them, including 383 with verified work emails and 199 with mobile numbers. Dublin is the largest hub.

This list covers custom software development agencies headquartered in Ireland, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

162Companies

1,046Contacts tracked

383Verified emails

199Mobile numbers

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The 25 largest custom software development agencies based in Ireland

Ranked by team size

Top 25 of 162 custom software development agencies based in Ireland, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Affirma	Dublin	501-1,000	406	207
2	Shark Software	Dublin	11-50	42	8
3	Drupart	Dublin	11-50	28	11
4	ISC Software Solutions LTD	n/a	11-50	27	11
5	3035tech	n/a	11-50	27	1
6	Devensis	n/a	11-50	21	3
7	Inventise	Bray	11-50	20	17
8	Perfutil Technologies	Dublin	11-50	15	5
9	Avaeon Solutions	Parkmore	11-50	14	11
10	APP Design	Galway	11-50	13	2
11	Grafton Digital	Galway	11-50	11	6
12	Demarq	n/a	11-50	10	10
13	threadable.io	Dublin	11-50	9	6
14	Armour By Granite	Galway	11-50	8	5
15	Dovetail Technologies LTD	Dublin	11-50	7	7
16	Devhaus	Gorey	11-50	7	5
17	Greenfinch Technology LTD	Dublin	11-50	7	1
18	Purpledecks	n/a	11-50	6	4
19	Bestsoft Consulting LTD	Dublin	11-50	6	4
20	Squarebreed	n/a	1-10	6	2
21	Vidappt	Malahide	11-50	5	5
22	Odin Consultants LTD	Dublin	11-50	5	4
23	Jalmia Solutions	Tubbercurry	1-10	4	2
24	Happen Software	Dublin	1-10	4	2
25	Square Root Solutions	Kilkenny	11-50	4	1

Showing 25 of 162 custom software development agencies based in Ireland

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 383 reachable decision-makers.

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Custom software development agencies based in Ireland at a glance

As of Aug 28, 2026

1-10Median size (employees)

DublinLargest hub · 62 HQs

199Contacts with mobile numbers

1Emails re-verified in last 30 days

Companies by employee count

1-10

102

11-50

51-200

501-1,000

Custom software development agencies by metro

Metro	Companies
Custom software development agencies in Dublin	62
Custom software development agencies in Galway	6
Custom software development agencies in Cork	4
Custom software development agencies in Limerick	4
Custom software development agencies in Letterkenny	3
Custom software development agencies in Dublin City	2
Custom software development agencies in Gorey	2

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “custom software development agencies”, with match quality audited by blind human judging, and headquartered in Ireland.
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: Contact records re-verify on a rolling cadence; 1 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many custom software development agencies are there based in Ireland?

There are 162 custom software development agencies headquartered in Ireland as of August 2026 (RevenueBase).

What is the largest company on this list?

Affirma, headquartered in Dublin, tops this list with the largest team on record.

Which city has the most custom software development agencies?

Dublin leads with 62 headquartered companies, followed by Galway (6) and Cork (4).

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 383 verified decision-maker contacts tracked across these 162 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 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.