Company lists · Data refreshed September 2026

Top 25 List security companies based in Ireland

Name: List security companies based in Ireland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 110 companies tracked

RevenueBase identified 110 list security companies headquartered in Ireland as of September 2026 and tracks 8,568 professional contacts across them, including 1,348 with verified work emails. Dublin is the largest hub.

This list covers list security companies 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

110Companies

8,568Contacts tracked

1,348Verified emails

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The 25 largest list security companies based in Ireland

Ranked by team size

Top 25 of 110 list security companies 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 list security companies: 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	Nostra	Partial evidence	Dublin 12, IrelandHQ checked Sep 21, 2026	201-500	288 contacts →
	Partial 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
5	Manguard Plus	Partial evidence	Naas, IrelandHQ checked Sep 21, 2026	501-1,000	213 contacts →
	Partial evidence “4-Time OSPA Winners (Outstanding Contract Security Company) 2022 - 2025 Manguard Plus is a privately owned, Irish Security company focused exclusively on the provision of Manned…” Source: RevenueBase Database · checked Sep 21, 2026
6	CSC	Indirect evidence	Unit W6a, IrelandHQ checked Sep 21, 2026	n/a	167 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
7	SAR Group	Indirect evidence	Dublin 12, IrelandHQ checked Sep 21, 2026	501-1,000	124 contacts →
	Indirect evidence “SAR Group is one of Ireland’s largest service providers offering our customers innovative, flexible and cost-effective solutions.” Source: RevenueBase Database · checked Sep 21, 2026
8	Septimius Security	Partial evidence	Dublin, IrelandHQ checked Sep 21, 2026	201-500	100 contacts →
	Partial evidence “Septimius Security stands alone as your global security partner offering: Global Presence, Local Expertise: Septimius Security is a global private security firm, combining…” Source: RevenueBase Database · checked Sep 21, 2026
9	Electro Automation LTD	Indirect evidence	Mulhuddart, IrelandHQ checked Sep 21, 2026	51-200	84 contacts →
	Indirect evidence “Electro Automation is regarded as one of Ireland's premier access controlled solutions provider.” Source: RevenueBase Database · checked Sep 21, 2026
10	Sharp Group Fire & Security Services	Partial evidence	Rathcoole, IrelandHQ checked Sep 21, 2026	51-200	79 contacts →
	Partial evidence “The only security system to have ISO37001 - anti bribery and corruption and the first to obtain ISO27001 - cyber security.” Source: RevenueBase Database · checked Sep 21, 2026
11	TOP Security Group	Partial evidence	Dublin, IrelandHQ checked Sep 21, 2026	501-1,000	67 contacts →
	Partial evidence “From modest beginnings in 1979 Top Security has grown to become one of Ireland’s leading providers of security services and products.” Source: RevenueBase Database · checked Sep 21, 2026
12	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
13	Pulse Security Management	Partial evidence	Dublin, IrelandHQ checked Sep 21, 2026	201-500	53 contacts →
	Partial evidence “Provider of high end security services to the private & public sectors offering services in the following.” Source: RevenueBase Database · checked Sep 21, 2026
14	Action24ireland	Partial evidence	Dublin 18, IrelandHQ checked Sep 21, 2026	51-200	40 contacts →
	Partial evidence “At Action24 we have been delivering intelligent security solutions for over 40 years.” Source: RevenueBase Database · checked Sep 21, 2026
15	GGL Security	Partial evidence	Limerick, IrelandHQ checked Sep 21, 2026	51-200	32 contacts →
	Partial evidence “GGL Security, founded in 1994, is an international security company.” Source: RevenueBase Database · checked Sep 21, 2026
16	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
17	RE Sure A Fortus Company	Indirect evidence	Dublin, IrelandHQ checked Sep 21, 2026	51-200	19 contacts →
	Indirect evidence “RE:SURE is part of the Fortus Group, the UK and Ireland's largest privately held CCTV and alarm distribution company.” Source: RevenueBase Database · checked Sep 21, 2026
18	Mercury Security Distribution	Partial evidence	Dublin 24, IrelandHQ checked Sep 21, 2026	11-50	19 contacts →
	Partial evidence “Mercury Security Distribution is a leading provider of innovative security solutions for businesses of all sizes.” Source: RevenueBase Database · checked Sep 21, 2026
19	Coleman Electronics LTD	Partial evidence	Ballina, IrelandHQ checked Sep 21, 2026	51-200	19 contacts →
	Partial evidence “Established in 1983, Coleman Electronics Ltd is one of the market leaders in the electronics and security industry in both the west and northwest of Ireland, whilst also operating…” Source: RevenueBase Database · checked Sep 21, 2026
20	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
21	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
22	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
23	Celtic Security And Facilities Solutions	Partial evidence	Cappoge, IrelandHQ checked Sep 21, 2026	201-500	13 contacts →
	Partial evidence “We provide excellence and attention to detail in domestic and commercial security all over Ireland.” Source: RevenueBase Database · checked Sep 21, 2026
24	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
25	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

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: list security companies. 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 list security companies.
Partial evidence: Its own public description names part of list security companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name list security companies. 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 110 list security companies based in Ireland

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List security companies based in Ireland at a glance

As of Sep 21, 2026

15.7%Verified-email coverage

77.9Average contacts per company

11-50Median size (employees)

26.4%Largest-city concentration · Dublin

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

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 110 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 list security companies, 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 “list security companies”. 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 list security companies), 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 list security companies, 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, 1,348 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.

List security companies by metro

List security companies in Dublin29

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 list security companies, 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 list security companies are there based in Ireland?

RevenueBase identified 110 list security companies 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 list security companies?

Dublin leads with 29 headquartered companies, followed by Naas (6) and Waterford (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 1,348 verified decision-maker contacts tracked across these 110 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.