Cybersecurity companies in Australia
16 companies in the directory are based in Australia. 11 are vendors and 5 are service firms. Of these, 3 belong 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.
16 companies, largest first
| Company | Category | Size | Ownership |
|---|---|---|---|
 CyberCX Australia and New Zealand's largest pure-play cybersecurity firm with offices in every major ANZ capital. CREST ANZ accredited and IRAP-listed for Australian Government testing. | Managed security services | 500+ staff | Part of Accenture |
 The Missing Link Sydney-headquartered Australian cybersecurity firm founded in 1997, now part of Infosys. CREST-approved with OSCP, OSCE, and OSEE-certified testers. | Penetration testing | 201-500 staff | Owned by Infosys |
 Sekuro Australian CREST-accredited cybersecurity consultancy formed from the 2021 Privasec, Naviro, AvertRo, and Theta merger. Risk-led offensive security with strong APRA and Essential Eight programme work. | Penetration testing | 51-200 staff | Owned by Insight Enterprises |
 InterIntra InterIntra is an Australian managed IT and cyber security provider. | Managed security services | 35 staff | Private |
 Project Black Australian senior-led boutique pen testing firm with consultants in Sydney, Melbourne, and Brisbane. CREST CRT, OSCP, and OSCE certified testers. | Penetration testing | 11-50 staff | Private |
 Borderless CS Australian CREST ANZ and CREST International accredited pen testing firm focused on enterprise-grade, manual-first offensive security. Sydney and Brisbane offices. | Penetration testing | 11-50 staff | Private |
 altaniche altaniche is a security practice that helps organisations adopt AI safely. | AI and LLM security | Private | |
 Alvor Alvor provides a security architecture management and compliance platform. | GRC and compliance automation | Private | |
 CyberSentien CyberSentien provides a compliance assurance engine that assesses organisations against multiple security and AI governance frameworks. | GRC and compliance automation | Private | |
 Eftsure Eftsure provides automated verification of vendor bank details to prevent payment fraud. | Fraud and payment fraud prevention | Private | |
 Fivecast Open source intelligence software that collects and analyses online data to detect threats and hidden networks for national security, law enforcement and financial crime teams. | OSINT tools | Private | |
 Red Piranha Red Piranha provides cybersecurity technology that consolidates protection, detection, and response across cloud, on-prem, and endpoints. | EDR and XDR | Private | |
 Suped Suped is an Australian company that sells a DMARC platform for IT teams. | DMARC and email authentication | Private | |
 WISECLICK WISECLICK sells cybersecurity memberships to small businesses and solo professionals in Australia. | Managed detection and response | Private | |
 QuintessenceLabs QuintessenceLabs provides quantum cybersecurity solutions for data protection and encryption. | Encryption and key management | Private | |
 Vireo Sentinel Vireo Sentinel provides browser-based AI governance to monitor and protect sensitive data. | AI and LLM security | Private |