Company lists · Data verified August 2026

Top 25 Cybersecurity startups based in Ireland

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 71 companies tracked

There are 71 cybersecurity startups headquartered in Ireland (RevenueBase, August 2026). RevenueBase tracks 1,767 professional contacts across them, including 955 with verified work emails and 262 with mobile numbers. Dublin is the largest hub.

This list covers cybersecurity startups 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.

71Companies

1,767Contacts tracked

955Verified emails

262Mobile numbers

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The 25 largest cybersecurity startups based in Ireland

Ranked by team size

Top 25 of 71 cybersecurity startups 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	Malwarebytes	Cork	501-1,000	606	330
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	Titanhq	Galway	51-200	76	60
6	Trend Micro Europe	Cork	5,001-10,000	76	54
7	Threatscape	Sandyford	11-50	38	30
8	Cloudguard	Belfast	11-50	33	23
9	Commsec Cyber Security	n/a	11-50	22	8
10	Dectar	Dubli	11-50	21	13
11	Whatsexposed	Castlebar	11-50	20	8
12	Cyber Ireland	n/a	1-10	17	4
13	Exclusive Networks Ireland	Ardcavan	11-50	16	12
14	Cytidel	n/a	11-50	16	11
15	Cyber Armed Security	Dublin	11-50	14	4
16	AVR	n/a	51-200	14	2
17	ATORO	n/a	11-50	13	1
18	Connecting Dots	Dublin	1-10	12	3
19	Penteor	Rathcoole	11-50	12	1
20	Nova Leah	Dundalk	11-50	11	9
21	Ward Solutions	n/a	51-200	11	7
22	Bunker Technical Solutions	n/a	11-50	11	6
23	Enterprise Defence	Sligo	11-50	10	6
24	Kontex	Dublin	51-200	9	6
25	Intercept Technologies	Dublin	1-10	8	4

Showing 25 of 71 cybersecurity startups based in Ireland

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Cybersecurity startups based in Ireland at a glance

As of Aug 28, 2026

1-10Median size (employees)

DublinLargest hub · 22 HQs

262Contacts with mobile numbers

1Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Cybersecurity startups by metro

Metro	Companies
Cybersecurity startups in Dublin	22
Cybersecurity startups in Cork	4
Cybersecurity startups in Galway	3
Cybersecurity startups in Belfast	2
Cybersecurity startups in Wexford	1
Cybersecurity startups in Sandyford	1
Cybersecurity startups in Dundalk	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 startups”, 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; 1 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 startups are there based in Ireland?

There are 71 cybersecurity startups headquartered in Ireland as of August 2026 (RevenueBase).

What is the largest company on this list?

Malwarebytes, headquartered in Cork, tops this list with the largest team on record.

Which city has the most cybersecurity startups?

Dublin leads with 22 headquartered companies, followed by Cork (4) and Galway (3).

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 955 verified decision-maker contacts tracked across these 71 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.

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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.