Quick answer: Cyber security companies in Perth fall into four groups: national enterprise firms that serve government and large corporates, specialist boutiques for penetration testing, governance and incident response, compliance and audit consultancies, and MSSP-delivered continuous security operations for businesses that need security run day to day rather than tested once. The right choice depends less on who has the flashiest red team and more on who is watching your systems on an ordinary Tuesday.
If you have decided your business needs help with cyber security and typed “cyber security companies Perth” into Google, you found a crowded and confusing page. Dozens of firms now sell security into the Perth market, and their offers range from a few thousand dollars for a single point-in-time test to enterprise retainers that do not publish a price at all. This guide maps who does what, as at 8 July 2026.
Full disclosure up front: Epic IT sells cyber security too, and we appear in the last category. Every description of another provider below comes from what that provider published on its own website on the day we wrote this. Where a firm does not publish something, we say “not published” rather than guess, and we never attribute or deny a certification to any firm unless its own site claims it. If we have described your firm inaccurately, contact us and we will correct it.
CyberCX describes itself on its own site as “Australia’s greatest force of cyber security and cloud experts” and states it has more than 1,400 cyber security and cloud professionals, nine security operations centres globally, an incident response team that handles more than 250 breaches a year, and ethical hackers who run more than 3,000 penetration tests a year. Its published capability list includes penetration testing, Essential Eight services, ISO 27001 certification services, a managed SOC and governance, risk and compliance. Worth knowing for Perth buyers: CyberCX absorbed the two best-known Perth boutiques, Asterisk Information Security and Diamond Cyber Security, both of which its own site now describes as “a CyberCX company”. A lot of Perth’s home-grown specialist talent now sits inside this national brand. Kinetic IT runs a head office on The Esplanade in Perth and describes itself on its own site as Australia’s largest independently owned IT company, Australian-owned with onshore support. Cyber security is one of its four service lines, covering governance risk and compliance, threat detection and response, advanced security operations and security assurance, and its published customer logos lean heavily to WA government and large enterprise. Tesserent was a large listed Australian cyber firm, but its own website now redirects to Thales Group, so it operates as the Australian cyber arm of Thales rather than a standalone brand. Worth knowing before you sign who you are actually contracting with.
Fit: government departments, critical infrastructure, ASX-listed companies and the top end of the resources sector. If you run a power station, a hospital network or a state government contract, this is your tier. If you have 40 staff and a Microsoft 365 tenant, you will be buying capability sized for an organisation many times larger.
The honest headline for this tier is that the two boutiques most Perth people would name, Asterisk and Diamond Cyber, are no longer independent, having both become CyberCX companies in 2019 by CyberCX’s own account. The specialists serving Perth today tend to be multi-city firms with a Perth office rather than Perth-born pure plays. White Rook Cyber lists a head office in Milton, Brisbane, and a Perth office in Osborne Park on its own site, and sells penetration testing, red and purple teaming, continuous penetration testing, GRC audits against Essential Eight, ISO 27001, NIST, SMB1001 and DISP, plus a managed SOC and incident response. Its own site footer displays a CREST logo and a Gold SMB1001 2023 Level 3 badge. Cythera, part of Bastion Security Group, lists a Perth office on St Georges Terrace alongside Melbourne, Brisbane, Sydney and New Zealand, and offers a full stack of penetration testing, managed detection and response, digital forensics and incident response, GRC and audit. It publishes its own ISO 27001 certificate in its site footer and describes a team of more than 150 specialists.
Fit: businesses that need a specific, expert engagement, a penetration test, a red team exercise, a breach investigated, or a framework assessed and attested. This tier is where you buy depth. Apply the location test hard: ask whether the tester and the responder are in Perth or flying in.
This tier is distinct from the offensive specialists. These are firms whose core business is assessment, attestation and audit rather than running your defences. The Big Four accounting firms, Deloitte, KPMG, PwC and EY, all run cyber practices out of their Perth offices. Deloitte, for example, publishes a Perth-based cyber graduate program covering strategy, penetration testing, identity, forensics and security operations. Mid-tier advisory firms such as RSM publish a dedicated cyber security and resilience service from their Perth office. Firms in this tier are strong on governance, board reporting, risk frameworks, IRAP-style assessment and certification audits, and light, by design, on being the people who answer the phone at 2am. They audit the guard. They are not the guard.
Fit: organisations that need independent assurance, an ISO 27001 or IRAP assessment, board-level risk reporting, or a regulator-facing attestation. You usually engage this tier alongside whoever runs your security day to day, not instead of them.
The gap in the three tiers above is what happens on day 91. A penetration test tells you where you were exposed on the day it ran. An audit tells you whether your paperwork lines up. Neither of them patches the server on Friday, revokes the departed employee’s access on Monday, or spots the impossible-travel login at midnight. That ongoing work belongs to a managed security service provider, and for most Perth SMBs it belongs with whoever already runs their IT, because security lives in the same Microsoft 365, identity and endpoint layer you already operate. This is where Epic IT’s managed security services sit, run as a continuous service rather than a one-off project. We are ISO 27001 certified, we implement the Essential Eight as standard rather than as an upsell, and we contribute to the SMB1001 framework that gives smaller businesses a realistic first rung. When a point-in-time test is the right tool we run penetration testing too, but the core of the offer is the day-to-day operation, backed by 22 years running IT and security for Perth businesses.
Fit: businesses from roughly 20 to a few hundred staff that need security owned and run, not just measured. We will not pretend to be neutral about this tier, so hold us to the same test as everyone else: ask any provider here to show you exactly what they monitor, how fast they respond, and where security appears on your service agreement rather than your invoice.
Most people who type “cyber security companies” into Google are picturing a single purchase that makes them secure. There is not one. A penetration test is a photograph: a skilled attacker takes a snapshot of your weaknesses on a given day and hands you the print. It is genuinely useful, and it is out of date the moment your team installs a new app or an attacker finds a new hole. Managed security is the security guard: someone on shift, watching the doors, checking the logs and turning people away, every day, including the day after the photo was taken.
Both matter. But if you can only start one, most small and mid-sized businesses need the guard before the photograph. This is the same argument we made about AI in our guide to the best AI consultants in Perth: a project that ends is not the same as a service that continues, and the risk does not politely wait for your next engagement. Buy the test when you need evidence. Buy the service because Tuesday keeps coming.
Start from the question you are answering, not the vendor list. “We need an IRAP or ISO 27001 assessment for a contract” points to the audit tier. “We think we have been breached” points to an incident response specialist, today, not next quarter. “We need to prove Essential Eight maturity to our insurer” is compliance work with an operational tail. And “nobody is actually watching our systems and we are one clicked link away from a bad week” is the operational tier, which is where most Perth businesses under a few hundred staff genuinely sit. If you are weighing up who runs your wider IT at the same time, our guide to choosing an IT support company in Perth covers that decision.
Then apply the location test. Plenty of firms ranking for Perth cyber searches are east coast or overseas businesses with a Perth landing page or a serviced office on St Georges Terrace. That can still be the right answer for the work. But you should know what you are buying. Ask where the analyst watching your alerts sits, who physically responds if you are breached, and who picks up at 8am Perth time when the rest of the country is still asleep.
Budget is the third filter, and cyber pricing is less transparent than most markets. A one-off penetration test for a small business commonly runs from a few thousand dollars into the tens of thousands depending on scope. Several Perth-serving specialists publish indicative pricing, most enterprise firms do not. Managed security is usually a monthly per-user or per-device line inside an IT agreement, and compliance audits are scoped per engagement. None of these is wrong. Paying for a boutique red team when what you needed was someone to turn on multi-factor authentication and watch the logs is.
Decide whether you need a test, an audit, or a guard. Evidence, assurance, or day-to-day operation. Most Perth businesses under a few hundred staff need the guard first, and the other two on a schedule.
Ask shortlisted providers for specifics, not adjectives. Who watches the alerts, how fast they respond, which certifications they actually hold, ask to see them, and where the work physically happens. Same test for every tier, including us.
Get a baseline before you commit to anyone. Our free security gap analysis maps what you have, what you are missing against the Essential Eight, and where the real risk sits, so every provider conversation starts from facts. Contact us on 1300 EPIC IT to book one.
It depends on the job. The cyber security companies in Perth span national enterprise firms (CyberCX, Kinetic IT, and Tesserent, now part of Thales), specialist boutiques serving Perth for testing and incident response (White Rook Cyber, Cythera), compliance and audit consultancies (the Big Four and mid-tier firms such as RSM), and MSSP-delivered continuous security, which is where Epic IT operates. Match the tier to your size and to whether you need a test, an audit or an ongoing service.
A consultant or specialist delivers a defined engagement: a penetration test, a red team exercise, a compliance assessment or an incident investigation. An MSSP runs your security continuously, covering monitoring, patching, identity and response as a service tied to your IT. Consultants tell you where you stand. An MSSP keeps you standing. Most small and mid-sized businesses need the ongoing service and buy consulting engagements on top when they need evidence.
It depends on the tier. A one-off penetration test commonly runs from a few thousand dollars upward depending on scope. Managed security is typically a monthly per-user or per-device fee inside an IT agreement, and compliance audits are scoped per engagement. For most Perth small businesses, ongoing managed security is the largest recurring line and the one that reduces day-to-day risk the most.
Almost never its own. A dedicated 24/7 SOC needs round-the-clock staff and tooling that only large organisations can justify. Most Perth small and mid-sized businesses get the same outcome by buying into a shared SOC through a managed security service provider, so you get the monitoring and response without funding the building and the night shift yourself.
Not always. Some firms ranking for Perth searches are headquartered on the east coast or overseas with a Perth office or landing page, and two of Perth’s best-known home-grown boutiques were acquired by a national firm years ago. Ask directly where the analysts watching your alerts and the responders handling a breach actually sit before you sign.
