Company lists · Data refreshed October 2026

Top 23 Cyber and data security software companies based in Ireland

RevenueBase identified 55 company matches for cyber and data security software companies associated with Ireland as of October 2026 and tracks 1,390 professional contacts across them, including 594 with verified work emails. Dublin is the largest hub.

This list covers company matches for cyber and data security software companies associated with Ireland, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 19, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Oct 19, 2026 How this list was built
55Companies
1,390Contacts tracked
594Verified emails
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The 23 largest cyber and data security software companies based in Ireland

Ranked by team size
Top 23 of 55 company matches for cyber and data security software companies based in Ireland, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 19, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchDublin 12, IrelandHQ recorded Oct 19, 2026201-500275 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
2Exact matchCork - London - New York City - Bucharest - Krakow - Belfast, IrelandHQ recorded Oct 19, 202651-200200 contacts →

Exact match

“At Smarttech247 we help global companies defend against cyber crime and protect their operations.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
3Exact matchGalway, IrelandHQ recorded Oct 19, 202651-20050 contacts →

Exact match

“TitanHQ and Redstor have merged to launch CyberSentriq, a cybersecurity champion built for MSPs and their customers.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
4Exact matchDublin, IrelandHQ recorded Oct 19, 202651-20033 contacts →

Exact match

“ThinScale is securing remote and hybrid work for the world’s largest organizations worldwide.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
5Exact matchCork, IrelandHQ recorded Oct 19, 202651-20031 contacts →

Exact match

“Vaultree is revolutionising data enablement and security through our pioneering Data-In-Use Encryption solutions.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
6Exact matchSandyford, IrelandHQ recorded Oct 19, 202651-20027 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
7Exact matchCork, IrelandHQ recorded Oct 19, 2026n/a24 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
8Exact matchBlanchardstown, IrelandHQ recorded Oct 19, 202611-5024 contacts →

Exact match

“CommSec is an Irish cyber security company helping organisations protect their systems, data, and operations against modern cyber threats.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
9Exact matchDublin, IrelandHQ recorded Oct 19, 202611-5022 contacts →

Exact match

“Dectar is an innovative European cyber security firm focused on proactively preventing cyberattacks and protecting the critical data at the core of every organization.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
10Exact matchDublin, IrelandHQ recorded Oct 19, 202651-20022 contacts →

Exact match

“Enigma Software Group USA LLC (”ESG”) is a privately-held international systems integrator and developer of PC security software, with offices in the United States, and the…”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
11Exact matchCitywest, IrelandHQ recorded Oct 19, 202611-5018 contacts →

Exact match

“Exclusive Networks is a global trusted cybersecurity specialist for digital infrastructure helping to drive the transition to a totally trusted digital future for all people and…”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
12Exact matchDublin, IrelandHQ recorded Oct 19, 202611-5012 contacts →

Exact match

“Our aim is to help organizations defend against cyber-attacks by finding their vulnerabilities in a proactive manner.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
13Exact matchPortarlington, IrelandHQ recorded Oct 19, 202611-5011 contacts →

Exact match

“Atoro is a cyber compliance consultancy for scaling software companies, and Europe's first ISO 42001 certified consultancy.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
14Exact matchDublin, IrelandHQ recorded Oct 19, 20261-108 contacts →

Exact match

“At Cyberhealth, we specialise in providing cost-effective cybersecurity services tailored specifically for small to medium-sized businesses (SMBs).”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
15Exact matchDublin, IrelandHQ recorded Oct 19, 202611-507 contacts →

Exact match

“Pure Networks is an established value-added Cyber Security reseller with best-of-breed vendors and world-class technical capability.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
16Exact matchIrelandHQ recorded Oct 19, 2026201-5007 contacts →

Exact match

“Advantio, was acquired by Integrity360 in July 2023.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
17Exact matchDublin, IrelandHQ recorded Oct 19, 20261-107 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
18Exact matchDublin, IrelandHQ recorded Oct 19, 202611-507 contacts →

Exact match

“PixAlert is a leading data software firm that allows organisations to index and search its entire network, enabling the detection of critical data, inappropriate behaviours such…”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
19Exact matchNaas, IrelandHQ recorded Oct 19, 20261-106 contacts →

Exact match

“Netfocus IT Solutions provides a comprehensive range of managed IT and cybersecurity services, supporting businesses in maintaining system uptime, safeguarding data, and enhancing…”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
20Exact matchLetterkenny, IrelandHQ recorded Oct 19, 20261-105 contacts →

Exact match

“At ITUS we believe that effective cybersecurity begins with understanding cyber risk for your business.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
21Exact matchDublin, IrelandHQ recorded Oct 19, 20261-105 contacts →

Exact match

“Attackers already know what's in your environment.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
22Exact matchSligo, IrelandHQ recorded Oct 19, 202611-504 contacts →

Exact match

“Enterprise Defence are an award winning team of cyber security specialists.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
23Exact matchClarecastle, IrelandHQ recorded Oct 19, 20261-104 contacts →

Exact match

“IT Security People Ltd was set up in response to the surge in Cybercrime exploits and IT Security threats in the Irish market.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase

Showing 23 of 55 cyber and data security software companies based in Ireland

See the full list, filter by size, metro and specialty, and access 594 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Cyber and data security software companies based in Ireland at a glance

As of Oct 19, 2026
42.7%Verified-email coverage
25.3Average contacts per company
11-50Median size (employees)
34.5%Largest-city concentration · Dublin
Oct 19, 2026Page data refreshed

Companies by employee count

1-10
24
11-50
20
51-200
6
201-500
3
501-1,000
1
5,001-10,000
1

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 55 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with Ireland whose business descriptions match “cyber and data security software companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 594 professional contacts with verified work emails across the full matched dataset. 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 October 19, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “cyber and data security software companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many cyber and data security software companies are there based in Ireland?

RevenueBase identified 55 company matches for cyber and data security software companies associated with Ireland as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Nostra tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most cyber and data security software companies?

Dublin leads with 19 company records, followed by Cork (3) and Galway (3).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 594 professional contacts with verified work emails tracked across these 55 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 19, 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 SmartSearch, 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.