Company lists · Data refreshed September 2026

Top 24 Managed security services companies based in Ireland

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

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 67 companies tracked

RevenueBase identified 67 managed security services companies headquartered in Ireland as of September 2026 and tracks 2,648 professional contacts across them, including 793 with verified work emails and 98 with mobile numbers. Dublin is the largest hub.

This list covers managed security services 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 5, 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 5, 2026 86% judged on-target in blind review

67Companies

2,648Contacts tracked

793Verified emails

98Mobile numbers

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The 24 largest managed security services companies based in Ireland

Ranked by team size

Top 24 of 67 managed security services companies based in Ireland, ranked by team size, largest first. Data refreshed Sep 5, 2026. RevenueBase Smart Search rates how each company's information relates to managed security services 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	Synergy Security Solutions	Partial evidence	Dublin 12, IrelandHQ checked Sep 5, 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 5, 2026
2	Viatel Technology Group	Strong evidence	Dublin 12, IrelandHQ checked Sep 5, 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 5, 2026
3	Nostra	Strong evidence	Dublin 12, IrelandHQ checked Sep 5, 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 5, 2026
4	Manguard Plus	Partial evidence	Naas, IrelandHQ checked Sep 5, 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 5, 2026
5	Titanhq	Indirect evidence	Galway, IrelandHQ checked Sep 5, 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 5, 2026
6	TOP Security Group	Partial evidence	Dublin, IrelandHQ checked Sep 5, 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 5, 2026
7	Secureism	Indirect evidence	Dublin, IrelandHQ checked Sep 5, 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 5, 2026
8	Pulse Security Management	Partial evidence	Dublin, IrelandHQ checked Sep 5, 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 5, 2026
9	Threatscape	Partial evidence	Dublin, IrelandHQ checked Sep 5, 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 5, 2026
10	Paradyn	Partial evidence	Sandyford, IrelandHQ checked Sep 5, 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 5, 2026
11	Commsec Cyber Security	Partial evidence	Blanchardstown, IrelandHQ checked Sep 5, 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 5, 2026
12	Secure Management Solutions LTD	Strong evidence	Dublin 24, IrelandHQ checked Sep 5, 2026	51-200	18 contacts →
	Strong 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 5, 2026
13	Cytidel	Partial evidence	Castlebar, IrelandHQ checked Sep 5, 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 5, 2026
14	Taskforce Security Management Services	Strong evidence	Leinster, IrelandHQ checked Sep 5, 2026	51-200	16 contacts →
	Strong 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 5, 2026
15	Iping IT Services	Partial evidence	Dublin 2, IrelandHQ checked Sep 5, 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 5, 2026
16	CSC Covert Security Consultants LTD	Partial evidence	Naas, IrelandHQ checked Sep 5, 2026	11-50	13 contacts →
	Partial evidence “CSC Covert Security Consultants Ltd has proven expertise in electronic security systems and manned security guarding, providing a 360-degree security solution to all business…” Source: RevenueBase Database · checked Sep 5, 2026
17	ATORO	Indirect evidence	Portarlington, IrelandHQ checked Sep 5, 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 5, 2026
18	Penteor	Indirect evidence	Dublin, IrelandHQ checked Sep 5, 2026	11-50	12 contacts →
	Indirect evidence “Our aim is to help organizations defend against cyber-attacks by finding their vulnerabilities in a proactive manner.” Source: RevenueBase Database · checked Sep 5, 2026
19	Ward Solutions	Partial evidence	IrelandHQ checked Sep 5, 2026	51-200	11 contacts →
	Partial evidence “Ward Solutions is Ireland’s largest Information Security provider.” Source: RevenueBase Database · checked Sep 5, 2026
20	Stryve Secure - The Cyber	Strong evidence	Galway, IrelandHQ checked Sep 5, 2026	201-500	11 contacts →
	Strong evidence “Sleepless provides security-first IT-managed services to support your operations, secure your data and enable digital transformation to empower your business.” Source: RevenueBase Database · checked Sep 5, 2026
21	Enterprise Defence	Partial evidence	Sligo, IrelandHQ checked Sep 5, 2026	11-50	10 contacts →
	Partial evidence “Enterprise Defence are an award winning team of cyber security specialists.” Source: RevenueBase Database · checked Sep 5, 2026
22	Ktech Security & Property Services	Indirect evidence	Dublin, IrelandHQ checked Sep 5, 2026	51-200	9 contacts →
	Indirect evidence “We offer a comprehensive service to determine the best solution for your requirements.” Source: RevenueBase Database · checked Sep 5, 2026
23	Definitive	Strong evidence	Swords, IrelandHQ checked Sep 5, 2026	11-50	9 contacts →
	Strong evidence “Definitive Solutions Limited was established in to provide a comprehensive outsourced IT Managed Services nationwide (specialising in security) tailored to our clients’ specific…” Source: RevenueBase Database · checked Sep 5, 2026
24	Edge7 Networks Networking & Cyber Security MSP	Partial evidence	Dublin, IrelandHQ checked Sep 5, 2026	11-50	8 contacts →
	Partial evidence “We help IT teams reduce complexity and risk by designing and operating networks where security is built in, not bolted on.” Source: RevenueBase Database · checked Sep 5, 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: managed security services 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 managed security services companies.
Partial evidence: Its own public description names part of managed security services companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name managed security services 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 24 of 67 managed security services companies based in Ireland

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Managed security services companies based in Ireland at a glance

As of Sep 5, 2026

29.9%Verified-email coverage

3.7%Mobile-number coverage

39.5Average contacts per company

11-50Median size (employees)

37.3%Largest-city concentration · Dublin

Sep 5, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

7470–30

4431–60

061–90

190–180

1180+

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 managed security services 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 “managed security services 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 managed security services 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 managed security services 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, 793 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 5, 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.

Managed security services companies by metro

Managed security services companies in Dublin25

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

RevenueBase identified 67 managed security services 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?

Synergy Security Solutions, headquartered in Ireland, tops this list with the largest team on record.

Which city has the most managed security services companies?

Dublin leads with 25 headquartered companies, followed by Naas (4) and Galway (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 793 verified decision-maker contacts tracked across these 67 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 5, 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.