Company lists · Data refreshed September 2026

Top 20 Ibm security vars based in Ireland

RevenueBase identified 40 ibm security vars headquartered in Ireland as of September 2026 and tracks 1,128 professional contacts across them, including 521 with verified work emails. Dublin is the largest hub.

This list covers ibm security vars 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 14, 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 14, 2026 86% judged on-target in blind review
40Companies
1,128Contacts tracked
521Verified emails
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The 20 largest ibm security vars based in Ireland

Ranked by team size
Top 20 of 40 ibm security vars based in Ireland, ranked by team size, largest first. Data refreshed Sep 14, 2026. RevenueBase Smart Search rates how each company's information relates to ibm security vars: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceDublin 12, IrelandHQ checked Sep 14, 2026201-500288 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 14, 2026
2Indirect evidenceGalway, IrelandHQ checked Sep 14, 202651-20077 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 14, 2026
3Indirect evidenceCork, IrelandHQ checked Sep 14, 20265,001-10,00075 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 14, 2026
4Partial evidenceDublin, IrelandHQ checked Sep 14, 202611-5036 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 14, 2026
5Partial evidenceBlanchardstown, IrelandHQ checked Sep 14, 202611-5021 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 14, 2026
6Partial evidenceDublin, IrelandHQ checked Sep 14, 202611-5020 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 14, 2026
7Partial evidenceCastlebar, IrelandHQ checked Sep 14, 202611-5016 contacts →

Partial evidence

“Cytidel helps security teams cut through the noise and focus on the vulnerabilities that actually matter.”

Source: RevenueBase Database · checked Sep 14, 2026
8Partial evidenceDublin, IrelandHQ checked Sep 14, 202611-5015 contacts →

Partial evidence

“We Simplify Cyber Security.”

Source: RevenueBase Database · checked Sep 14, 2026
9Indirect evidenceCitywest, IrelandHQ checked Sep 14, 202611-5015 contacts →

Indirect evidence

“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…”

Source: RevenueBase Database · checked Sep 14, 2026
10Indirect evidencePortarlington, IrelandHQ checked Sep 14, 202611-5013 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 14, 2026
11Indirect evidenceDublin, IrelandHQ checked Sep 14, 202611-5012 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 14, 2026
12Partial evidenceSligo, IrelandHQ checked Sep 14, 202611-5010 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 14, 2026
13Indirect evidenceDublin, IrelandHQ checked Sep 14, 20261-107 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 14, 2026
14Indirect evidenceBallycoolen, IrelandHQ checked Sep 14, 20261-106 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 14, 2026
15Partial evidenceNaas, IrelandHQ checked Sep 14, 202611-505 contacts →

Partial evidence

“Novi delivers security-oriented IT services that reduce risk and enable growth.”

Source: RevenueBase Database · checked Sep 14, 2026
16Indirect evidenceDublin 15, IrelandHQ checked Sep 14, 20261-104 contacts →

Indirect evidence

“Zirona was founded by Jack Foran, an IT consultant with nearly two decades of experience in implementing & managing IT infrastructure, IT services and cybersecurity, as a response…”

Source: RevenueBase Database · checked Sep 14, 2026
17Indirect evidenceDublin, IrelandHQ checked Sep 14, 20261-103 contacts →

Indirect evidence

“CytekOne simplifies the complexity of cybersecurity by unifying various protective layers and leveraging AI.”

Source: RevenueBase Database · checked Sep 14, 2026
18Indirect evidenceIrelandHQ checked Sep 14, 2026201-5003 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 14, 2026
19Partial evidenceRathdown Lower, IrelandHQ checked Sep 14, 20261-103 contacts →

Partial evidence

“BeSecureOnline is cloud-based cyber security company”

Source: RevenueBase Database · checked Sep 14, 2026
20Indirect evidenceDublin, IrelandHQ checked Sep 14, 20261-101 contacts →

Indirect evidence

“Pure IT Universe are providers of a fully managed cloud-based cybersecurity platform based on technology from Palo Alto Networks.”

Source: RevenueBase Database · checked Sep 14, 2026

Showing 20 of 40 ibm security vars based in Ireland

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Ibm security vars based in Ireland at a glance

As of Sep 14, 2026
46.2%Verified-email coverage
28.2Average contacts per company
11-50Median size (employees)
35.0%Largest-city concentration · Dublin
Sep 14, 2026Page data refreshed

Companies by employee count

1-10
19
11-50
15
51-200
1
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 40 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 ibm security vars, 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 “ibm security vars”. 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 ibm security vars), 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 ibm security vars, 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, 521 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 14, 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 ibm security vars, 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 ibm security vars are there based in Ireland?

RevenueBase identified 40 ibm security vars 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?

Nostra, headquartered in Dublin, tops this list with the largest team on record.

Which city has the most ibm security vars?

Dublin leads with 14 headquartered companies, followed by Galway (3) and Ballycoolen (1).

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 521 verified decision-maker contacts tracked across these 40 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 14, 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.