Company lists · Data refreshed September 2026
Top 24 Security auditing firms based in Australia
RevenueBase identified 440 security auditing firms headquartered in Australia as of September 2026 and tracks 3,088 professional contacts across them, including 1,219 with verified work emails and 136 with mobile numbers. Sydney is the largest hub.
This list covers security auditing 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 24 largest security auditing firms based in Australia
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 170 | ||||
“Ensuring your business is handling cyber security risks effectively has never been more important.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 2 | 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. | |||||
| 3 | 104 | ||||
“Sekuro is a cyber security and digital resiliency solutions provider that helps CIOs and CISOs take a strategic approach to cyber security risk mitigation and building business…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 4 | 93 | ||||
“Australia’s cyber-first Managed Service Provider and true technology partner.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 5 | 47 | ||||
“Our mission is to help our clients protect their assets, reputation, and customers from cyber threats, while also enabling them to embrace digital transformation and innovation…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 6 | 46 | ||||
“Clarity in a complex world.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 7 | 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. | |||||
| 8 | 41 | ||||
“Seccom Global - The Cyber Security Company Providing excellence in service to educate, connect and protect your business Founded in 2003, Seccom Global is recognised as a leader…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 9 | 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. | |||||
| 10 | 33 | ||||
“NSB Cyber is an Australian-founded, privately owned cyber security company based in Sydney.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 11 | 31 | ||||
“CSO Group provides ICT security services and solutions to protect Australian businesses from advanced cyber threats.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 12 | 31 | ||||
“At Excite Cyber, we envision a world where businesses can fearlessly embrace technology and leverage the best cyber expertise for robust, outcome-focused solutions.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 13 | 26 | ||||
“Minimise the risk of a cybersecurity incident.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 14 | 26 | ||||
“About Us - Australia’s leading cybersecurity specialist, delivering comprehensive protection by Australian-based consultants only-no offshore teams- 100% cybersecurity-focused…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 15 | 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. | |||||
| 16 | 25 | ||||
“For most organisations in Australia, a data breach can be more than a PR disaster, it could be the final chapter.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 17 | 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. | |||||
| 18 | 21 | ||||
“At Empire Technologies, our unwavering dedication to delivering technology solutions can help you drive business success.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 19 | 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. | |||||
| 20 | 20 | ||||
“Hashlock is the industry leading web3 security auditing firm.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 21 | 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. | |||||
| 22 | 19 | ||||
“We provide offensive cyber security services to world leading organisations.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 23 | 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. | |||||
| 24 | 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. | |||||
Showing 24 of 440 security auditing firms based in Australia
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Security auditing 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 auditing 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 auditing 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 auditing 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, 1,219 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 auditing firms by metro
Frequently asked
How many security auditing firms are there based in Australia?
RevenueBase identified 440 security auditing 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?
Risk Associates - Emea & Asia, headquartered in Bella Vista, tops this list with the largest team on record.
Which city has the most security auditing firms?
Sydney leads with 101 headquartered companies, followed by Melbourne (82) and Brisbane (35).
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 1,219 verified decision-maker contacts tracked across these 440 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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