Company lists · Data refreshed September 2026

Top 25 IT security managed services based in Ireland

Name: IT security managed services based in Ireland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 105 companies tracked

RevenueBase identified 105 IT security managed services headquartered in Ireland as of September 2026 and tracks 1,910 professional contacts across them, including 948 with verified work emails. Dublin is the largest hub.

This list covers IT security managed 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 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

105Companies

1,910Contacts tracked

948Verified emails

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The 25 largest IT security managed services based in Ireland

Ranked by team size

Top 25 of 105 IT security managed services based in Ireland, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to IT security managed 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	Viatel Technology Group	Strong evidence	Dublin 12, IrelandHQ checked Sep 21, 2026	201-500	335 contacts →
	Strong evidence “We deliver fully managed security, networking, cloud and communications services designed to drive enterprise.” Source: RevenueBase Database · checked Sep 21, 2026
2	Nostra	Strong evidence	Dublin 12, IrelandHQ checked Sep 21, 2026	201-500	288 contacts →
	Strong evidence “Nostra was established in 2006 and in that time has become one of Ireland’s most trusted providers of Managed IT and Cyber Security Services for a wide range of sectors.” Source: RevenueBase Database · checked Sep 21, 2026
3	Titanhq	Indirect evidence	Galway, IrelandHQ checked Sep 21, 2026	51-200	77 contacts →
	Indirect evidence “TitanHQ and Redstor have merged to launch CyberSentriq, a cybersecurity champion built for MSPs and their customers.” Source: RevenueBase Database · checked Sep 21, 2026
4	Secureism	Indirect evidence	Dublin, IrelandHQ checked Sep 21, 2026	11-50	65 contacts →
	Indirect evidence “Secureism is founded by the brains who were awarded for their contribution to secure the cyber space on national as well as international level.” Source: RevenueBase Database · checked Sep 21, 2026
5	HCS	Indirect evidence	Dublin 24, IrelandHQ checked Sep 21, 2026	51-200	63 contacts →
	Indirect evidence “The technology landscape may be changing every day, but with a team of internationally accredited experts right here in Ireland, HCS can navigate your organisation across its…” Source: RevenueBase Database · checked Sep 21, 2026
6	Innovate	Strong evidence	Dublin 18, IrelandHQ checked Sep 21, 2026	11-50	58 contacts →
	Strong evidence “INNOVATE - The IT Solutions People INNOVATE provide Managed IT Services and Professional IT Services across \| Networking \| Security \| Communications \| Cloud Productivity \| Cloud…” Source: RevenueBase Database · checked Sep 21, 2026
7	Futurerange	Indirect evidence	Sandyford, IrelandHQ checked Sep 21, 2026	11-50	45 contacts →
	Indirect evidence “We are FutureRange.” Source: RevenueBase Database · checked Sep 21, 2026
8	Threatscape	Strong evidence	Dublin, IrelandHQ checked Sep 21, 2026	11-50	36 contacts →
	Strong evidence “We are a pure play IT security company, which allows us to focus solely on protecting your business from cyber threats.” Source: RevenueBase Database · checked Sep 21, 2026
9	Unitec IT Solutions	Indirect evidence	Clonmel, IrelandHQ checked Sep 21, 2026	11-50	35 contacts →
	Indirect evidence “Unitec are an international technology company with offices in both Ireland and South Africa.” Source: RevenueBase Database · checked Sep 21, 2026
10	Evad Technology Group	Strong evidence	Dublin, IrelandHQ checked Sep 21, 2026	51-200	34 contacts →
	Strong evidence “Founded in 2008, EVAD Technology Group delivers Zero‑Trust IT managed services across Ireland, the UK, Europe, Asia and Africa, specialising in cloud solutions, cybersecurity…” Source: RevenueBase Database · checked Sep 21, 2026
11	it.ie	Strong evidence	Dublin, IrelandHQ checked Sep 21, 2026	11-50	31 contacts →
	Strong evidence “We have been delivering premium Managed IT Services & Technology Solutions to business clients across Ireland since 2004.” Source: RevenueBase Database · checked Sep 21, 2026
12	Paradyn	Strong evidence	Sandyford, IrelandHQ checked Sep 21, 2026	51-200	27 contacts →
	Strong evidence “Paradyn is a leading provider of IT security and consultancy services in Ireland, offering a comprehensive, best-in-class suite of security services to monitor, protect and defend…” Source: RevenueBase Database · checked Sep 21, 2026
13	Infinity IT	Strong evidence	Dublin, IrelandHQ checked Sep 21, 2026	11-50	26 contacts →
	Strong evidence “Infinity IT provides Managed IT, Security and Communications Solutions and Services, both in the Cloud and On Premise, to both the Private and Public sectors.” Source: RevenueBase Database · checked Sep 21, 2026
14	Infinite Technology	Strong evidence	Dublin, IrelandHQ checked Sep 21, 2026	11-50	26 contacts →
	Strong evidence “At Infinite Technology, we’re dedicated to advancing Irish businesses with IT solutions that enhance efficiency, strengthen security, and drive growth.” Source: RevenueBase Database · checked Sep 21, 2026
15	Commsec Cyber Security	Partial evidence	Blanchardstown, IrelandHQ checked Sep 21, 2026	11-50	21 contacts →
	Partial evidence “CommSec is an Irish cyber security company helping organisations protect their systems, data, and operations against modern cyber threats.” Source: RevenueBase Database · checked Sep 21, 2026
16	Whatsexposed	Strong evidence	Castlebar, IrelandHQ checked Sep 21, 2026	11-50	20 contacts →
	Strong evidence “CREST-certified offensive security and continuous exposure management, delivered through a single SaaS platform.” Source: RevenueBase Database · checked Sep 21, 2026
17	Cytidel	Partial evidence	Castlebar, IrelandHQ checked Sep 21, 2026	11-50	16 contacts →
	Partial evidence “Cytidel helps security teams cut through the noise and focus on the vulnerabilities that actually matter.” Source: RevenueBase Database · checked Sep 21, 2026
18	Arbelos LTD	Partial evidence	Dublin, IrelandHQ checked Sep 21, 2026	11-50	15 contacts →
	Partial evidence “We take care of your IT operations so you can focus on what you do best, running your business.” Source: RevenueBase Database · checked Sep 21, 2026
19	A To Z Computers	Partial evidence	Kilkenny, IrelandHQ checked Sep 21, 2026	1-10	15 contacts →
	Partial evidence “At A to Z Computers Ireland, we help SMEs eliminate IT headaches, strengthen cybersecurity, and build reliable, future-ready technology environments.” Source: RevenueBase Database · checked Sep 21, 2026
20	Enclave	Strong evidence	Dublin 12, IrelandHQ checked Sep 21, 2026	11-50	14 contacts →
	Strong evidence “Managed IT Services Enclave’s Managed IT service for small to medium sized businesses lowers the cost of supporting IT systems, delivered at a fixed price with no hidden expenses…” Source: RevenueBase Database · checked Sep 21, 2026
21	Iping IT Services	Partial evidence	Dublin 2, IrelandHQ checked Sep 21, 2026	1-10	14 contacts →
	Partial evidence “Some of iPing's services - Tel: 01 524 1350 Managed Services The implementation of managed services in your network is an important piece in your overall network design.” Source: RevenueBase Database · checked Sep 21, 2026
22	Datatrust	Indirect evidence	Dunshaughlin, IrelandHQ checked Sep 21, 2026	11-50	13 contacts →
	Indirect evidence “Since 2005, DataTrust has been helping businesses across Ireland turn technology from a business risk into a competitive advantage.” Source: RevenueBase Database · checked Sep 21, 2026
23	Radium Technologies	Strong evidence	Dublin 18, IrelandHQ checked Sep 21, 2026	1-10	13 contacts →
	Strong evidence “Radium is based in Dublin, Ireland, and delivers a range of professional IT services to suit all business needs including IT Consulting, Technical Support Helpdesk, Managed IT…” Source: RevenueBase Database · checked Sep 21, 2026
24	ATORO	Indirect evidence	Portarlington, IrelandHQ checked Sep 21, 2026	11-50	13 contacts →
	Indirect evidence “Atoro is a cyber compliance consultancy for scaling software companies, and Europe's first ISO 42001 certified consultancy.” Source: RevenueBase Database · checked Sep 21, 2026
25	Hybrid Technology Partners	Indirect evidence	Limerick, IrelandHQ checked Sep 21, 2026	11-50	12 contacts →
	Indirect evidence “Protecting operations.” 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: IT security managed 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 IT security managed services.
Partial evidence: Its own public description names part of IT security managed services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name IT security managed 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 105 IT security managed services based in Ireland

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IT security managed services based in Ireland at a glance

As of Sep 21, 2026

49.6%Verified-email coverage

18.2Average contacts per company

11-50Median size (employees)

36.2%Largest-city concentration · Dublin

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 Ireland, so it is reported there. Company counts and contact totals on this page are exact for Ireland, over 105 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 IT security managed 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 “IT security managed 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 IT security managed 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 IT security managed 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, 948 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.

IT security managed services by metro

IT security managed services in Dublin38

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 IT security managed 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 IT security managed services are there based in Ireland?

RevenueBase identified 105 IT security managed 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?

Viatel Technology Group, headquartered in Ireland, tops this list with the largest team on record.

Which city has the most IT security managed services?

Dublin leads with 38 headquartered companies, followed by Galway (4) and Naas (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 948 verified decision-maker contacts tracked across these 105 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.

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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.