Trusted Across 3 Continents

One Breach Can Change Everything. Don't Let It.

Stealth Cyber delivers 24/7 protection for your data, keeping you safe from cyber threats, protecting your business's reputation, and helping you stay ahead of regulatory requirements, so you can focus on running your business with confidence.

Offices in AU · BR · US
24/7 SOC monitoring
ACSC E8 · CMMC · ISO 27001
10,000+
Threats Blocked
30+
Businesses Protected
20+
Businesses Uplifted to E8 ML3
100%
Client Retention
<15min
Mean Time to Detect
24/7
Around-the-Clock Protection
Our Services

How We Protect Your Business

Every service is designed around one goal: keeping your business safe, compliant, and confident.

Managed Detection & Response

Sleep easier knowing your business is monitored 24/7. We detect and shut down threats before they become breaches, so you never have to.

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Incident Response

Already under attack? Our team mobilises fast to contain the damage, get you back online, and make sure it doesn't happen again.

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Essential Eight Compliance

Meet the ACSC Essential Eight requirements your insurers and clients are asking for. We assess where you are and get you where you need to be.

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GRC & Compliance

Cut through the complexity of cyber regulations. We make compliance straightforward, from the Privacy Act to global frameworks.

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CMMC Assessment

Need CMMC certification for US defence contracts? We guide you from gap assessment to audit-ready, so you can win and keep those contracts.

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ISO 27001

Show your clients and partners you take security seriously. We handle your ISO 27001 journey from start to certification.

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AI Security

Using AI in your business? We make sure it doesn't become your biggest vulnerability, from LLMs to ML pipelines.

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AI Management Systems

Govern your AI responsibly. We help you build frameworks for AI risk, transparency, and accountability that regulators expect.

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Managed Security Services

Get a full security operations capability without building one yourself. Monitoring, vulnerability management, and training, all managed.

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Penetration Testing

Find out where your weaknesses are before attackers do. Real-world testing with clear, actionable results.

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AI Security Specialists

Leading the Way in AI Security

As businesses race to adopt AI, the attack surface is expanding faster than most security teams can keep up. Stealth Cyber is at the forefront, protecting, governing, and red teaming AI systems for organisations worldwide.

AI Red Teaming

We simulate real-world adversarial attacks against your AI systems, aligned to the AIUC-1 standard. From prompt injection and jailbreaks to data poisoning and model manipulation. Find out how your AI holds up before an attacker does.

AI Management Systems

Build robust AI governance aligned to ISO 42001. We help you manage AI risk, bias, transparency, and accountability with frameworks that satisfy regulators and build stakeholder trust.

AI Readiness Assessments

Planning to adopt AI? We assess your organisation’s readiness, covering data governance, security controls, risk appetite, and regulatory obligations, so you can move forward with confidence.

AI Red Team Training

We train the next generation of AI Red Team Engineers. Our hands-on programmes cover adversarial testing techniques for LLMs, ML pipelines, and generative AI systems.

50+
AI Systems Assessed
20+
AI Red Team Engagements
10+
Organisations AI-Ready Certified
30+
AI Red Team Engineers Trained

Is your business ready for AI? Take the free assessment.

AI Assessment
Who We Are

Our Story

Led by experienced, global, and industry award-winning leadership, Stealth Cyber was created because we believe every business, regardless of size, deserves the highest level of cyber protection.

With over 25 years of combined experience across government, retail, aviation, space technology, and financial services, we bring a wealth of knowledge to support and guide you through your cybersecurity journey.

We have a passion for the industry and a desire to help businesses secure their digital assets, providing confidence to your customers, partners, and employees that their data is secure.

Learn more about us

24/7 Protection

Round-the-clock SOC monitoring with zero gaps in coverage.

Multi-Framework

Essential Eight, CMMC, ISO 27001, NIST, and AI governance.

3 Continents

Offices in Gold Coast, São Paulo, and Texas for global coverage.

Certified Experts

CISSP, CISM, OSCP, ISO 27001, ISO 42001, and CMMC certified professionals.

Testimonials

What Our Clients Say

Trusted by businesses across Australia, the Americas, and beyond.

Chris and the team at Stealth Cyber have played a critical role in improving the firm’s cyber security processes and systems. I have been particularly impressed by their dedication to helping staff understand cyber security risks and teach proactive ways to both improve and measure security. The team is responsive and clearly incredibly knowledgeable. It has been a welcomed breath of fresh air to partner with Stealth Cyber to ensure better cyber and data protection for our firm and our valuable clients.

Nikolina Palasrinne

Founder & Principal, Rubix Legal

When CertMate was looking for the right cyber security support to help grow in the SaaS market, we found far more than a vendor. We found a genuine partner. What stood out wasn’t just their expertise, but how readily Chris and the team adapted to the way we work. Every question was met with a fast, practical answer. As a SaaS business, having a cyber security partner that understands our space and grows alongside us has made all the difference.

Carina Steinbakk

Founder, Aevi Tech

As a law firm handling highly sensitive client data, our IT and cybersecurity requirements are non-negotiable. Stealth Cyber provides a sophisticated and proactive service that goes well beyond basic IT protection. Their layered strategy ensures our firm remains fully protected against evolving cyber risks while keeping every team member alert and informed. I have complete confidence in their ability to safeguard our systems.

Margherite Walsh

Managing Principal, Walsh Legal Group

FAQ

Common Questions

Answers to the questions business owners ask most about cybersecurity.

Proactive cybersecurity focuses on preventing attacks before they happen, using continuous monitoring, vulnerability management, threat hunting, and security awareness training. Reactive cybersecurity responds after a breach has occurred, focusing on containment and recovery. Proactive security reduces the likelihood and impact of attacks, while reactive security manages the fallout. Most modern businesses need both, but investing in proactive measures significantly reduces overall risk and cost. Stealth Cyber delivers proactive 24/7 managed detection and response alongside reactive incident response services.

Common signs of a business compromise include unusual network traffic, unexpected system slowdowns, unexplained account lockouts, employees receiving phishing emails from internal accounts, unfamiliar software or processes running on devices, and unexpected data transfers. Many breaches go undetected for months because businesses lack continuous monitoring. The average dwell time for an undetected breach is over 200 days. A managed detection and response (MDR) service monitors your environment 24/7 and detects threats in minutes, not months.

A managed detection and response (MDR) service includes 24/7 monitoring of your endpoints, network, cloud, and email by trained security analysts in a Security Operations Centre (SOC). It covers real-time threat detection, alert investigation and triage, threat intelligence enrichment, automated and manual containment of active threats, incident escalation, and regular reporting. Unlike basic antivirus or SIEM tools, MDR analysts actively investigate every alert and take action on your behalf. Stealth Cyber's MDR service also includes monthly threat briefings and risk reports.

Managed cybersecurity for a small business in Australia typically ranges from $1,500 to $10,000 per month depending on the number of users, devices, and services included. Basic managed security (endpoint protection, monitoring, and patching) sits at the lower end, while comprehensive MDR with 24/7 SOC monitoring, vulnerability management, and compliance support is at the higher end. For context, the average cost of a data breach for an Australian SMB exceeds $200,000. Stealth Cyber offers tailored packages based on your business size and risk profile.

The Essential Eight is a set of eight cybersecurity mitigation strategies developed by the Australian Cyber Security Centre (ACSC) to protect organisations against the most common cyber threats. It covers application control, patching applications, patching operating systems, multi-factor authentication, restricting admin privileges, restricting Office macros, user application hardening, and regular backups. Compliance is mandatory for Australian government entities and increasingly required by enterprise clients, insurers, and government contractors. Organisations are assessed at maturity levels 0 to 3. Even if not legally required, the Essential Eight is the most practical cybersecurity baseline for any Australian business.

Most businesses can be fully onboarded to a managed cybersecurity service within 2 to 4 weeks. The first week typically covers scoping, agent deployment on endpoints, and integration with your existing tools (email, cloud, network). Week two focuses on baseline tuning to reduce false positives and align alerting to your environment. By week three or four, 24/7 monitoring is fully operational. Stealth Cyber assigns a dedicated onboarding team to ensure a smooth transition with minimal disruption to your day-to-day operations.

When a threat is detected, our SOC analysts immediately investigate to confirm whether it is a genuine threat or a false positive. If confirmed, the threat is contained automatically or manually depending on severity. This may include isolating an affected device, blocking a malicious IP, disabling a compromised account, or killing a malicious process. You are notified with a clear, jargon-free summary of what happened, what was done, and what you need to know. For critical incidents, our team escalates directly to your nominated contact by phone. Post-incident, we provide a full report with root cause analysis and hardening recommendations.

No. Cyber insurance covers financial losses after a breach, but it does not prevent breaches or reduce their severity. Most cyber insurance policies also require businesses to meet minimum security standards before a claim will be paid. Common requirements include multi-factor authentication, regular patching, endpoint protection, and backup testing. If these controls are not in place, insurers can deny claims. A managed security service ensures you meet these requirements and actively prevents incidents, reducing both the likelihood of a claim and your insurance premiums.

A 50-person accounting firm handling sensitive financial data needs, at minimum: multi-factor authentication on all accounts, endpoint protection on every device, email security to block phishing, regular patching of operating systems and applications, encrypted and tested backups, security awareness training for all staff, and a documented incident response plan. Recommended additions include 24/7 managed detection and response (MDR), vulnerability scanning, dark web monitoring for leaked credentials, and Essential Eight compliance if operating in Australia. Stealth Cyber provides tailored packages for professional services firms that cover all of these requirements.

The best way to assess your current cyber risk is to start with a structured self-assessment that evaluates your security controls across key areas like access management, patching, backups, incident response, and data protection. Stealth Cyber offers a free online cybersecurity self-assessment at stealthcyber.io/assessment that scores your organisation out of 100 and provides personalised recommendations. For a deeper review, a professional security assessment from a qualified cybersecurity provider will identify specific vulnerabilities, compliance gaps, and prioritised remediation steps tailored to your business.

Find Out Where You're Exposed

Take our free 5-minute security assessment and get a clear picture of your risk. No obligation, no jargon.

Or book a call with our team for a personalised review.