Company lists · Data refreshed September 2026

Top 25 Enterprise security services based in Ireland

Name: Enterprise security 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 51 companies tracked

RevenueBase identified 51 enterprise security services headquartered in Ireland as of September 2026 and tracks 6,872 professional contacts across them, including 975 with verified work emails. Dublin is the largest hub.

This list covers enterprise security 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

51Companies

6,872Contacts tracked

975Verified emails

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The 25 largest enterprise security services based in Ireland

Ranked by team size

Top 25 of 51 enterprise security 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 enterprise security 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	TYCO	Partial evidence	Cork, IrelandHQ checked Sep 21, 2026	10001+	5,384 contacts →
	Partial evidence “Tyco offers comprehensive security solutions to protect people, facilities, and assets as part of Johnson Controls world leading portfolio of building products, technologies…” Source: RevenueBase Database · checked Sep 21, 2026
2	Synergy Security Solutions	Partial evidence	Dublin 12, IrelandHQ checked Sep 21, 2026	1,001-5,000	400 contacts →
	Partial evidence “Established in 1993 Synergy Security Solutions, is now one of the largest security service providers in Ireland.” Source: RevenueBase Database · checked Sep 21, 2026
3	Securitas Ireland	Partial evidence	Clonee, IrelandHQ checked Sep 21, 2026	1,001-5,000	371 contacts →
	Partial evidence “As the world’s leading intelligent security services provider, we proudly stand guard to protect what really matters – the safety and welfare of people and property everywhere.” Source: RevenueBase Database · checked Sep 21, 2026
4	CSC	Indirect evidence	Unit W6a, IrelandHQ checked Sep 21, 2026	n/a	167 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
5	Vanderbilt By Acre Security	Indirect evidence	Dublin, IrelandHQ checked Sep 21, 2026	201-500	57 contacts →
	Indirect evidence “Acre brands, united!” Source: RevenueBase Database · checked Sep 21, 2026
6	Threatscape	Partial evidence	Dublin, IrelandHQ checked Sep 21, 2026	11-50	36 contacts →
	Partial 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
7	Paradyn	Partial evidence	Sandyford, IrelandHQ checked Sep 21, 2026	51-200	27 contacts →
	Partial 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
8	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
9	Secure Management Solutions LTD	Partial evidence	Dublin 24, IrelandHQ checked Sep 21, 2026	51-200	18 contacts →
	Partial evidence “Secure Management Solutions (SMS) is a security company founded by highly experienced security company managers with 80 years of experience together.” Source: RevenueBase Database · checked Sep 21, 2026
10	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
11	Taskforce Security Management Services	Partial evidence	Leinster, IrelandHQ checked Sep 21, 2026	51-200	16 contacts →
	Partial evidence “Taskforce Security Management Services is a pioneering start-up that has emerged as a leader in the field of security services in Ireland.” Source: RevenueBase Database · checked Sep 21, 2026
12	Third EYE Technology	Partial evidence	Nenagh, IrelandHQ checked Sep 21, 2026	1-10	13 contacts →
	Partial evidence “Third Eye Technology specialise in providing security and management solutions through the integration and use of CCTV, Access Control, Intruder Alarm Systems, Automation and…” Source: RevenueBase Database · checked Sep 21, 2026
13	Viatech Security Systems LTD	Partial evidence	Dublin 12, IrelandHQ checked Sep 21, 2026	11-50	12 contacts →
	Partial evidence “Viatech Security Systems is a leading provider of integrated electronic security systems, delivering end-to-end solutions that keep your people, property, and assets safe.” Source: RevenueBase Database · checked Sep 21, 2026
14	Ward Solutions	Partial evidence	IrelandHQ checked Sep 21, 2026	51-200	11 contacts →
	Partial evidence “Ward Solutions is Ireland’s largest Information Security provider.” Source: RevenueBase Database · checked Sep 21, 2026
15	Enterprise Defence	Strong evidence	Sligo, IrelandHQ checked Sep 21, 2026	11-50	10 contacts →
	Strong evidence “Enterprise Defence are an award winning team of cyber security specialists.” Source: RevenueBase Database · checked Sep 21, 2026
16	Park 100 Fire & Security	Partial evidence	Wexford, IrelandHQ checked Sep 21, 2026	11-50	9 contacts →
	Partial evidence “Park 100 security specialists will design the best possible solution for you using state-of-the-art equipment to ensure safety 24/7 – 365 days a year.” Source: RevenueBase Database · checked Sep 21, 2026
17	Kontex	Partial evidence	Dublin, IrelandHQ checked Sep 21, 2026	51-200	8 contacts →
	Partial evidence “Formed in Ireland in 2015, Kontex has grown to become a leading supplier of security technologies and services to organisations around the world.” Source: RevenueBase Database · checked Sep 21, 2026
18	Leacam Technology Consulting LTD	Partial evidence	Dublin, IrelandHQ checked Sep 21, 2026	1-10	7 contacts →
	Partial evidence “Leacam offers security-first IT support services that help protect your business, minimise the number and severity of security incidents, and reduces your overall IT costs.” Source: RevenueBase Database · checked Sep 21, 2026
19	Tusa IT	Indirect evidence	Ballycoolen, IrelandHQ checked Sep 21, 2026	1-10	6 contacts →
	Indirect evidence “TUSA IT helps your business to leverage IT Solutions to keep you secure and drive your business goals.” Source: RevenueBase Database · checked Sep 21, 2026
20	NOVI	Partial evidence	Naas, IrelandHQ checked Sep 21, 2026	11-50	5 contacts →
	Partial evidence “Novi delivers security-oriented IT services that reduce risk and enable growth.” Source: RevenueBase Database · checked Sep 21, 2026
21	Immediate Action LTD	Partial evidence	Dublin 8, IrelandHQ checked Sep 21, 2026	1-10	5 contacts →
	Partial evidence “At Immediate Action our core business is Integrated Security Solutions.” Source: RevenueBase Database · checked Sep 21, 2026
22	Cytekone	Indirect evidence	Dublin, IrelandHQ checked Sep 21, 2026	1-10	3 contacts →
	Indirect evidence “CytekOne simplifies the complexity of cybersecurity by unifying various protective layers and leveraging AI.” Source: RevenueBase Database · checked Sep 21, 2026
23	Besecureonline	Partial evidence	Rathdown Lower, IrelandHQ checked Sep 21, 2026	1-10	3 contacts →
	Partial evidence “BeSecureOnline is cloud-based cyber security company” Source: RevenueBase Database · checked Sep 21, 2026
24	Netsec LTD	Strong evidence	Dublin 2, IrelandHQ checked Sep 21, 2026	1-10	2 contacts →
	Strong evidence “Netsec delivers security focused IT support, software and projects across a wide range of small to medium & enterprise businesses based in Ireland and beyond.” Source: RevenueBase Database · checked Sep 21, 2026
25	Noone Cyber Services	Partial evidence	Ballinasloe, IrelandHQ checked Sep 21, 2026	1-10	1 contacts →
	Partial evidence “Offer cyber security services primarily in system access control and Identity Access Management.” 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: enterprise security 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 enterprise security services.
Partial evidence: Its own public description names part of enterprise security services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name enterprise security 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 51 enterprise security services based in Ireland

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Enterprise security services based in Ireland at a glance

As of Sep 21, 2026

14.2%Verified-email coverage

134.7Average contacts per company

11-50Median size (employees)

37.3%Largest-city concentration · Dublin

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

10001+

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 51 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 enterprise security 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 “enterprise security 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 enterprise security 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 enterprise security 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, 975 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.

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 enterprise security 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 enterprise security services are there based in Ireland?

RevenueBase identified 51 enterprise security 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?

TYCO, headquartered in Cork, tops this list with the largest team on record.

Which city has the most enterprise security services?

Dublin leads with 19 headquartered companies, followed by Belfast (2) and Naas (2).

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 975 verified decision-maker contacts tracked across these 51 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.