Company lists · Data refreshed September 2026
Top 25 Network security consulting firms based in Ireland
RevenueBase identified 61 network security consulting firms headquartered in Ireland as of September 2026 and tracks 989 professional contacts across them, including 497 with verified work emails and 40 with mobile numbers. Dublin is the largest hub.
This list covers network security consulting firms 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, how directly it supports the match, 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 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.
The 25 largest network security consulting firms based in Ireland
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | Viatel Technology GroupStrong evidence | 335 | |||
“We deliver fully managed security, networking, cloud and communications services designed to drive enterprise.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 2 | 288 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 3 | 81 | ||||
“BH Consulting is an independent consulting firm in operation since 2004.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 4 | 27 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 5 | 21 | ||||
“CommSec is an Irish cyber security company helping organisations protect their systems, data, and operations against modern cyber threats.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 6 | Viso Cyber SecurityPartial evidence | 15 | |||
“We Simplify Cyber Security.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 7 | 13 | ||||
“Atoro is a cyber compliance consultancy for scaling software companies, and Europe's first ISO 42001 certified consultancy.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 8 | 12 | ||||
“Our aim is to help organizations defend against cyber-attacks by finding their vulnerabilities in a proactive manner.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 9 | Ward SolutionsPartial evidence | 11 | |||
“Ward Solutions is Ireland’s largest Information Security provider.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 10 | Enterprise DefencePartial evidence | 10 | |||
“Enterprise Defence are an award winning team of cyber security specialists.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 11 | 8 | ||||
“Intercept Technologies, the game-changer in advanced monitoring and state-of-the-art tooling, offering unparalleled identification and remediation of potential exposures and…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 12 | 8 | ||||
“Ripplecom delivers telecoms and IT security that really work for business.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 13 | 7 | ||||
“Secora Consulting are experts in cybersecurity and risk mitigation.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 14 | 7 | ||||
“At Cyberhealth, we specialise in providing cost-effective cybersecurity services tailored specifically for small to medium-sized businesses (SMBs).” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 15 | 7 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 16 | 6 | ||||
“TUSA IT helps your business to leverage IT Solutions to keep you secure and drive your business goals.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 17 | 5 | ||||
“Cybertree Engineers are Information Security Specialists.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 18 | 5 | ||||
“Novi delivers security-oriented IT services that reduce risk and enable growth.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 19 | 4 | ||||
“Attackers already know what's in your environment.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 20 | 4 | ||||
“At Advice Bytes, we go beyond just advice, we deliver outcomes.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 21 | Zirona IT & CybersecurityIndirect evidence | 4 | |||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 22 | 3 | ||||
“Advantio, was acquired by Integrity360 in July 2023.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 23 | Ipoptions LimitedStrong evidence | 2 | |||
“Expertise Built On Experience IPOptions are a TCP/IP Service and Consultancy Company specialising in Security, Systems; Network Integration and Messaging including VoIP with…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 24 | 2 | ||||
“Cyber Security Consultancy services are delivered by a team of experienced in-house consultants.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 25 | 2 | ||||
“Services SWIFT CSP Compliance Independent expertise to achieve SWIFT CSP compliance, resilience, and regulatory compliance.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 61 network security consulting firms based in Ireland
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Network security consulting firms based in Ireland at a glance
As of Sep 5, 2026Companies by employee count
Verified emails by last verification
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 network security consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in Ireland whose own description of what they do matches “network security consulting firms”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among network security consulting firms, 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 an evidence 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, 497 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.
Network security consulting firms by metro
- Network security consulting firms in Dublin25
Frequently asked
How many network security consulting firms are there based in Ireland?
RevenueBase identified 61 network security consulting firms 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?
Viatel Technology Group, headquartered in Ireland, tops this list with the largest team on record.
Which city has the most network security consulting firms?
Dublin leads with 25 headquartered companies, followed by Naas (2) and All (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 497 verified decision-maker contacts tracked across these 61 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 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.
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