Company lists · Data refreshed September 2026

Top 25 Custom business software development services based in Ireland

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

Compiled by the RevenueBase Data Team Data refreshed Sep 24, 2026 142 companies tracked

RevenueBase identified 142 custom business software development services headquartered in Ireland as of September 2026 and tracks 1,164 professional contacts across them, including 539 with verified work emails and 52 with mobile numbers. Dublin is the largest hub.

This list covers custom business software development services headquartered in Ireland, 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 24, 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 24, 2026 86% judged on-target in blind review

142Companies

1,164Contacts tracked

539Verified emails

52Mobile numbers

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The 25 largest custom business software development services based in Ireland

Ranked by team size

Top 25 of 142 custom business software development services based in Ireland, ranked by team size, largest first. Data refreshed Sep 24, 2026. RevenueBase Smart Search rates how each company's information relates to custom business software development 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	Intact	Strong evidence	Dundalk, IrelandHQ checked Sep 24, 2026	201-500	183 contacts →
	Strong evidence “Founded in 1992 Intact is an Ireland and UK based business management and ERP software and services company where all product development, consultancy and support is carried out…” Source: RevenueBase Database · checked Sep 24, 2026
2	Prostrategy	Partial evidence	Citywest Business Campus, IrelandHQ checked Sep 24, 2026	51-200	74 contacts →
	Partial evidence “Established in 1985, with offices in Cork & Dublin, ProStrategy has over 40 years’ experience providing Business Management Software Solutions & Services to Irish and…” Source: RevenueBase Database · checked Sep 24, 2026
3	Opensky Data Systems	Indirect evidence	Naas, IrelandHQ checked Sep 24, 2026	51-200	69 contacts →
	Indirect evidence “OpenSky Data Systems - Business Process Automation Specialists.” Source: RevenueBase Database · checked Sep 24, 2026
4	Deveire	Indirect evidence	National Technology Park, IrelandHQ checked Sep 24, 2026	51-200	55 contacts →
	Indirect evidence “Deveire creates bespoke digital solutions that transform your business world.” Source: RevenueBase Database · checked Sep 24, 2026
5	Ayphen Technologies	Indirect evidence	Galway, IrelandHQ checked Sep 24, 2026	11-50	43 contacts →
	Indirect evidence “Ayphen Technologies is a forward-thinking company based in Ireland, built to solve real-world business challenges through intelligent technology.” Source: RevenueBase Database · checked Sep 24, 2026
6	Dataworks Limited	Partial evidence	Waterford, IrelandHQ checked Sep 24, 2026	11-50	41 contacts →
	Partial evidence “Dataworks applies technology to drive real change, improved efficiencies and cost reduction for its customers.” Source: RevenueBase Database · checked Sep 24, 2026
7	Cozmotec	Indirect evidence	Dublin, IrelandHQ checked Sep 24, 2026	11-50	29 contacts →
	Indirect evidence “Cozmotec is a dynamic consultancy specialising in helping SMEs streamline and optimise their business processes through smart automation and tailored technology solutions.” Source: RevenueBase Database · checked Sep 24, 2026
8	Konnektable Technologies LTD	Partial evidence	Waterford, IrelandHQ checked Sep 24, 2026	11-50	23 contacts →
	Partial evidence “Konnektable Technologies is a software technology firm, based in the Republic of Ireland.” Source: RevenueBase Database · checked Sep 24, 2026
9	Devensis	Partial evidence	Dublin 18, IrelandHQ checked Sep 24, 2026	11-50	21 contacts →
	Partial evidence “At Devensis, we don’t just develop software-we create solutions that transform businesses.” Source: RevenueBase Database · checked Sep 24, 2026
10	Inventise	Strong evidence	Bray, IrelandHQ checked Sep 24, 2026	11-50	20 contacts →
	Strong evidence “Inventise specialise in enterprise custom software developments ranging from accessible, engaging and intuitive websites and webapps to complex online corporate CRM solutions…” Source: RevenueBase Database · checked Sep 24, 2026
11	DSI Decare Systems Ireland	Strong evidence	Curraheen Road, IrelandHQ checked Sep 24, 2026	51-200	20 contacts →
	Strong evidence “DeCare Systems Ireland (DSI) is an enterprise software development company specialising in architecting, developing and integrating custom.Net and Java applications.” Source: RevenueBase Database · checked Sep 24, 2026
12	Anitech Solutions	Indirect evidence	Dublin, IrelandHQ checked Sep 24, 2026	11-50	18 contacts →
	Indirect evidence “Formed in 2006, Anitech Solutions is an I.T.” Source: RevenueBase Database · checked Sep 24, 2026
13	Perfutil Technologies	Partial evidence	Dublin, IrelandHQ checked Sep 24, 2026	11-50	15 contacts →
	Partial evidence “At Perfutil, we are committed to offering top-notch software solutions, seamlessly blending superior quality with cost-efficiency tailored to your business needs Our diverse team…” Source: RevenueBase Database · checked Sep 24, 2026
14	Avaeon Solutions	Partial evidence	Parkmore, IrelandHQ checked Sep 24, 2026	11-50	14 contacts →
	Partial evidence “Established in 2001, Avaeon is a wholly owned Irish software company based in Galway, Ireland.” Source: RevenueBase Database · checked Sep 24, 2026
15	Sapro Solutions LTD	Indirect evidence	Dublin, IrelandHQ checked Sep 24, 2026	11-50	10 contacts →
	Indirect evidence “SAPRO Solutions is an Irish based consultancy, specialising in Enterprise Applications and Technology and is an official member of the SAP® PartnerEdge® Open Ecosystem.” Source: RevenueBase Database · checked Sep 24, 2026
16	Dovetail Technologies LTD	Partial evidence	Dublin, IrelandHQ checked Sep 24, 2026	11-50	7 contacts →
	Partial evidence “Dovetail is a specialist provider of custom IT solutions.” Source: RevenueBase Database · checked Sep 24, 2026
17	Greenfinch Technology LTD	Strong evidence	Dublin 2, IrelandHQ checked Sep 24, 2026	11-50	7 contacts →
	Strong evidence “Greenfinch Technology, part of the TEKenable Group, is a Dublin based software development company focused on solving business problems with innovative technology.” Source: RevenueBase Database · checked Sep 24, 2026
18	Devhaus	Strong evidence	Gorey, IrelandHQ checked Sep 24, 2026	11-50	6 contacts →
	Strong evidence “We build hardworking software products your customers will love.” Source: RevenueBase Database · checked Sep 24, 2026
19	Bestsoft Consulting LTD	Partial evidence	Dublin, IrelandHQ checked Sep 24, 2026	11-50	6 contacts →
	Partial evidence “BestSoft Consulting is a SITECORE partner - we proud to partner with SiteCore to give our customers the opportunity of leading technology matched with leading consulting team.” Source: RevenueBase Database · checked Sep 24, 2026
20	Ignite Software	Strong evidence	Waterford, IrelandHQ checked Sep 24, 2026	1-10	6 contacts →
	Strong evidence “Ignite Software specialize in Bespoke Software Development for your business needs.” Source: RevenueBase Database · checked Sep 24, 2026
21	UWS IE LTD	Strong evidence	Dublin, IrelandHQ checked Sep 24, 2026	11-50	6 contacts →
	Strong evidence “UWS is a custom software development company driven by creating business value with software.” Source: RevenueBase Database · checked Sep 24, 2026
22	Trojan Technologies	Indirect evidence	Buncrana, IrelandHQ checked Sep 24, 2026	1-10	6 contacts →
	Indirect evidence “With nearly 30 years of experience in the tech industry, Trojan Technologies is a quality-driven business where innovation is at the heart of everything we do.” Source: RevenueBase Database · checked Sep 24, 2026
23	Abbey Software Technologies	Partial evidence	Ennis, IrelandHQ checked Sep 24, 2026	11-50	6 contacts →
	Partial evidence “Abbey Software Technologies is an idea commune manifested by a group of futurists, business strategists, creative minds, technowizs, that work in harmony to deliver smart &…” Source: RevenueBase Database · checked Sep 24, 2026
24	MCS Integrated Solutions	Indirect evidence	Dublin, IrelandHQ checked Sep 24, 2026	1-10	5 contacts →
	Indirect evidence “Managing your business is made simple when your accounting and financial processes are integrated and efficient.” Source: RevenueBase Database · checked Sep 24, 2026
25	Team Project	Strong evidence	Co. Kildare, IrelandHQ checked Sep 24, 2026	1-10	5 contacts →
	Strong evidence “Team Project design, implement and support cost-effective tailored software solutions using existing market leading software packages and development tools.” Source: RevenueBase Database · checked Sep 24, 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: custom business software development 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 custom business software development services.
Partial evidence: Its own public description names part of custom business software development services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name custom business software development 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 142 custom business software development services based in Ireland

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Custom business software development services based in Ireland at a glance

As of Sep 24, 2026

46.3%Verified-email coverage

4.5%Mobile-number coverage

8.2Average contacts per company

1-10Median size (employees)

33.1%Largest-city concentration · Dublin

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 26.0d

4050–30

12431–60

461–90

290–180

4180+

Company record updated

Median 79.0d

00–30

24131–60

54961–90

31290–180

62180+

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 custom business software development 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 Ireland whose own description of what they do matches “custom business software development 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 custom business software development 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 custom business software development services, and records with no verified work email. Companies headquartered outside Ireland 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, 539 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 24, 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.

Custom business software development services by metro

Custom business software development services in Dublin47

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 custom business software development 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 custom business software development services are there based in Ireland?

RevenueBase identified 142 custom business software development services headquartered in Ireland 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?

Intact, headquartered in Dundalk, tops this list with the largest team on record.

Which city has the most custom business software development services?

Dublin leads with 47 headquartered companies, followed by Cork (5) and Limerick (5).

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 539 verified decision-maker contacts tracked across these 142 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 24, 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 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.