Cybersecurity companies in Ireland
4 companies in the directory are based in Ireland. 2 are vendors and 2 are service firms. Of these, 1 belongs to another company or an investor.
The list runs largest first. We rank by revenue from annual reports where a listed company files one, then by staff numbers. Companies with no revenue or staff figure come last.
4 companies, largest first
| Company | Category | Size | Ownership |
|---|---|---|---|
 Integrity360 CREST-accredited pan-European cybersecurity services provider delivering penetration testing and managed security from Dublin with a strong UK and Ireland presence. | Managed detection and response | 201-500 staff | Owned by August Equity |
 Tines Tines provides a secure environment where teams can build AI agents, applications and automations. | SOAR and security automation | 200 staff | Private |
 CommSec Dublin-based Irish CREST-accredited pen testing firm. Human-led testing with strong NIS 2 and DORA expertise for Irish and EU clients. | Penetration testing | 11-50 staff | Private |
 Accenture Cybersecurity consulting and managed security services covering cyber strategy, resilience, zero trust protection and operational technology security, within a global IT services firm. | Security consulting and vCISO | Private |