Company lists · Data verified August 2026

Top 25 Custom software developers based in Ireland

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 137 companies tracked

There are 137 custom software developers headquartered in Ireland (RevenueBase, August 2026). RevenueBase tracks 1,069 professional contacts across them, including 411 with verified work emails and 198 with mobile numbers. Dublin is the largest hub.

This list covers custom software developers 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.

137Companies

1,069Contacts tracked

411Verified emails

198Mobile numbers

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The 25 largest custom software developers based in Ireland

Ranked by team size

Top 25 of 137 custom software developers 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	Dataworks Limited	Waterford	11-50	41	32
4	Ardanis	Dublin	51-200	37	20
5	Drupart	Dublin	11-50	28	11
6	ISC Software Solutions LTD	n/a	11-50	27	11
7	3035tech	n/a	11-50	27	1
8	Devensis	n/a	11-50	21	3
9	Inventise	Bray	11-50	20	17
10	Perfutil Technologies	Dublin	11-50	15	5
11	Avaeon Solutions	Parkmore	11-50	14	11
12	APP Design	Galway	11-50	13	2
13	Grafton Digital	Galway	11-50	11	6
14	Demarq	n/a	11-50	10	10
15	threadable.io	Dublin	11-50	9	6
16	Dovetail Technologies LTD	Dublin	11-50	7	7
17	Devhaus	Gorey	11-50	7	5
18	Greenfinch Technology LTD	Dublin	11-50	7	1
19	Bestsoft Consulting LTD	Dublin	11-50	6	4
20	Purpledecks	n/a	11-50	6	4
21	Ignite Software	Citywest	1-10	6	4
22	Squarebreed	n/a	1-10	6	2
23	Team Project	Celbridge	1-10	5	2
24	Jalmia Solutions	Tubbercurry	1-10	4	2
25	Happen Software	Dublin	1-10	4	2

Showing 25 of 137 custom software developers based in Ireland

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 411 reachable decision-makers.

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Custom software developers based in Ireland at a glance

As of Aug 28, 2026

1-10Median size (employees)

DublinLargest hub · 53 HQs

198Contacts with mobile numbers

1Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Custom software developers by metro

Metro	Companies
Custom software developers in Dublin	53
Custom software developers in Galway	6
Custom software developers in Cork	3
Custom software developers in Letterkenny	3
Custom software developers in Waterford	2
Custom software developers in Dublin City	2
Custom software developers in Bray	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 developers”, 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 developers are there based in Ireland?

There are 137 custom software developers 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 developers?

Dublin leads with 53 headquartered companies, followed by Galway (6) and Cork (3).

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 411 verified decision-maker contacts tracked across these 137 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.