Company lists · Data verified August 2026

Top 25 Cybersecurity service providers based in Ireland

Name: Cybersecurity service providers based in Ireland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 115 companies tracked

There are 115 cybersecurity service providers headquartered in Ireland (RevenueBase, August 2026). RevenueBase tracks 1,944 professional contacts across them, including 933 with verified work emails and 77 with mobile numbers. Dublin is the largest hub.

This list covers cybersecurity service providers headquartered in Ireland, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

115Companies

1,944Contacts tracked

933Verified emails

77Mobile numbers

Unlock all 115 companies Free account · no credit card · 2 minutes

The 25 largest cybersecurity service providers based in Ireland

Ranked by team size

Top 25 of 115 cybersecurity service providers based in Ireland, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Viatel Technology Group	n/a	201-500	334	143
2	Nostra	Dublin	201-500	286	204
3	Smarttech247	Belfast	51-200	188	79
4	Conscia	Citywest Business Campus	1,001-5,000	94	28
5	BH Consulting	Blanchardstown	11-50	81	14
6	Titanhq	Galway	51-200	76	60
7	Trend Micro Europe	Cork	5,001-10,000	76	54
8	Secureism	Ireland	11-50	63	25
9	Threatscape	Sandyford	11-50	38	30
10	Cloudguard	Belfast	11-50	33	23
11	Evad Technology Group	Dublin	51-200	33	22
12	Paradyn	n/a	51-200	28	24
13	Dataway	n/a	11-50	28	11
14	Infinite Technology	Kilkenny	11-50	26	8
15	Commsec Cyber Security	n/a	11-50	22	8
16	Whatsexposed	Castlebar	11-50	20	8
17	Exclusive Networks Ireland	Ardcavan	11-50	16	12
18	Vmgroup	n/a	11-50	16	11
19	Cyber Armed Security	Dublin	11-50	14	4
20	AVR	n/a	51-200	14	2
21	Datatrust	n/a	11-50	13	7
22	ATORO	n/a	11-50	13	1
23	Hybrid Technology Partners	Limerick	11-50	12	10
24	Penteor	Rathcoole	11-50	12	1
25	Ward Solutions	n/a	51-200	11	7

Showing 25 of 115 cybersecurity service providers based in Ireland

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 933 reachable decision-makers.

Free account · no credit card

See all 115 companies

Cybersecurity service providers based in Ireland at a glance

As of Aug 28, 2026

1-10Median size (employees)

DublinLargest hub · 32 HQs

77Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

5,001-10,000

Cybersecurity service providers by metro

Metro	Companies
Cybersecurity service providers in Dublin	32
Cybersecurity service providers in Cork	5
Cybersecurity service providers in Galway	4
Cybersecurity service providers in Tallaght	2
Cybersecurity service providers in Wexford	2
Cybersecurity service providers in Belfast	2
Cybersecurity service providers in Kildare	1

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “cybersecurity service providers”, with match quality audited by blind human judging, and headquartered in Ireland.
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: Contact records re-verify on a rolling cadence; 0 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many cybersecurity service providers are there based in Ireland?

There are 115 cybersecurity service providers headquartered in Ireland as of August 2026 (RevenueBase).

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 cybersecurity service providers?

Dublin leads with 32 headquartered companies, followed by Cork (5) and Galway (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 933 verified decision-maker contacts tracked across these 115 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

Ready to reach these companies? Verified emails and direct dials for all 115 cybersecurity service providers based in Ireland. Start with a free account, no credit card.

Get the full list

Related lists

Cybersecurity service providers by geography

Browse the directory

Browse: Companies home · All Ireland lists · All Cybersecurity service providers lists · New lists

About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.