Company lists · Data refreshed September 2026
Top 25 Security audit firms based in Australia
RevenueBase identified 218 security audit firms headquartered in Australia as of September 2026 and tracks 1,381 professional contacts across them, including 435 with verified work emails and 67 with mobile numbers. Sydney is the largest hub.
This list covers security audit firms headquartered in Australia, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, how directly it supports the match, and when it was last checked. Data refreshed September 6, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest security audit firms based in Australia
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 123 | ||||
“Triskele Labs is one of Australia’s fastest growing cybersecurity companies.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 2 | 42 | ||||
“Vectra, an Ensign company, is Australia’s trusted partner for security consulting, risk management, compliance, and managed services.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 3 | 35 | ||||
“When it comes to security there's no shortage of companies ready to tell you about your vulnerabilities.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 4 | 25 | ||||
“Fortian is a leading Australian company specialising in cyber security, privacy, and technology risk management.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 5 | 23 | ||||
“SilentGrid is an offensive security consultancy with a focus on adversary simulation and penetration testing.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 6 | 20 | ||||
“Cyconsol is an Australian based professional service provider specialising in the delivery of cyber security and IT related business consulting and training services.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 7 | 20 | ||||
“Hashlock is the industry leading web3 security auditing firm.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 8 | 19 | ||||
“We are a specialist, audit only firm providing professional audit and assurance services throughout New South Wales.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 9 | 19 | ||||
“RightSec offers a wide range of cyber security services to meet all business needs, from our Governance, Risk and Compliance (GRC) practice to our more technical services.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 10 | 19 | ||||
“Based on the Gold Coast, GCIT provides IT security and managed services across Australia.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 11 | 17 | ||||
“Zynet is an Australian cyber security and IT services provider with more than 25 years of experience protecting organisations and keeping critical systems running.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 12 | 15 | ||||
“Welcome to Jypra Group, where we deliver Cyber & AI, Simplified.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 13 | 14 | ||||
“Sentaris (a certified B Corporation) is an Australian security services provider specialising in cyber assurance and incident response services.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 14 | 14 | ||||
“Facing the Complexities of Cybersecurity?” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 15 | 14 | ||||
“Morrisec provides tailored security strategies and services that align with each company’s specific threat landscape, risk profile, and strategic goals.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 16 | 10 | ||||
“Volkis is a dedicated information security consultancy that provides penetration testing, security assessment, red team, GRC, and training services at its core.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 17 | 9 | ||||
“Cyber Audit Team is a leading multi-disciplinary Australian cyber security company offering holistic 'end-to-end' solutions, ensuring that our clients' businesses are operating in…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 18 | 9 | ||||
“CyberHub was established with the aim of making Cyber Security more available to companies of all sizes.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 19 | 9 | ||||
“Overview: Cyber Ethos is a leading cybersecurity business based in Queensland, Australia, equipping businesses with unrivalled cybersecurity solutions.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 20 | 9 | ||||
“Our mission is simple, make cyber security accessible to all Australian businesses.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 21 | NORTHPartial evidence | 9 | |||
“north is about helping clients tailor their cyber security to the challenges that are specific to their business.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 22 | 8 | ||||
“At Cliffside, we believe the cybersecurity industry has a truth problem: vendors oversell, consultants overcomplicate, and products are pushed over real solutions.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 23 | 8 | ||||
“Haksec is a small cybersecurity firm based in Queensland, Australia founded by Luke Stephens (hakluke).” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 24 | 7 | ||||
“dotSec is a professional cyber security organisation that was founded in on a single premise: A business that treats security as a strategic asset should be able to operate with…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 25 | 7 | ||||
“Crysp Consulting (Crysp) was founded by two professionals with collective experience of more than 35 years in the industry.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 218 security audit firms based in Australia
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Security audit firms based in Australia at a glance
As of Sep 6, 2026Companies by employee count
Verified emails by last verification
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among security audit firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in Australia whose own description of what they do matches “security audit firms”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among security audit firms, and records with no verified work email. Companies headquartered outside Australia are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and an evidence rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- 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
- Every listed company carries at least one verified work email, 435 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 6, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Security audit firms by metro
- Security audit firms in Sydney44
- Security audit firms in Melbourne43
Frequently asked
How many security audit firms are there based in Australia?
RevenueBase identified 218 security audit firms headquartered in Australia as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Triskele Labs, headquartered in Melbourne, tops this list with the largest team on record.
Which city has the most security audit firms?
Sydney leads with 44 headquartered companies, followed by Melbourne (43) and Brisbane (16).
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 435 verified decision-maker contacts tracked across these 218 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 6, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 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 with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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