Company lists · Data refreshed September 2026
Top 25 Security auditing firms based in Melbourne, Australia
RevenueBase identified 82 security auditing firms headquartered in Melbourne, Australia as of September 2026 and tracks 616 professional contacts across them, including 218 with verified work emails. Sydney is the largest hub.
This list covers security auditing firms headquartered in Melbourne, 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 auditing firms based in Melbourne, 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 | 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. | |||||
| 3 | 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. | |||||
| 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 | 19 | ||||
“We provide offensive cyber security services to world leading organisations.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 6 | 18 | ||||
“CyberSecOn is an Information security company with a presence in Australia, USA and India.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 7 | 17 | ||||
“GRC360 Pvt.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 8 | 15 | ||||
“Morfit Group Consulting is a pure IT Consulting and Professional Services organisation.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 9 | 13 | ||||
“We help organisations get better at Security Operations and Cyber Threat Intelligence with specialised consulting, engineering, and managed security platforms.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 10 | 11 | ||||
“Information security and technology risk management consulting - at CyberRisk we design, implement and operate information security programs to allow you to reduce and manage your…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 11 | 8 | ||||
“Cyber Range, SOC designing and implementation, risk and security assessment.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 12 | 5 | ||||
“Secure computing and digital security transformation.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 13 | 5 | ||||
“ITSEC Australia & New Zealand helps organisations build resilience across IT, OT, and IoT environments.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 14 | 5 | ||||
“With a singular focus on "Information Security", Trusted Impact prides itself on delivering demonstrable business outcomes by applying an independent perspective and by leveraging…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 15 | 5 | ||||
“At CyberZone Global, we provide expert cyber advisory, security testing, consulting, Artificial Intelligence and cyber security training services tailored to your organisation’s…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 16 | 5 | ||||
“Secure Alley is an IT and cybersecurity company built for the realities of today’s AI-driven digital landscape.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 17 | 5 | ||||
“Cyber Forte is an Australian owned Cyber Security company with headquarters in Melbourne.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 18 | 3 | ||||
“Sicarius is an Australian cybersecurity firm offering three services: Beacon, a continuous security posture monitoring platform for Australian AFFORDABILITY TAILORED FOR SMALL…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 19 | Hyplon SecurityPartial evidence | 3 | |||
“We take a positive approach to cyber security by focusing on what is important to organisations to make it more secure without disrupting business operations.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 20 | Tawfik ConsultingPartial evidence | 3 | |||
“Tawfik Consulting is a dynamic consulting company with subject matter experts is logistics, system engineering and cyber security.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 21 | Pure.Security A Tesserent CompanyPartial evidence | 2 | |||
“Pure Security is part of the Tesserent group, and is rebranding as Tesserent - Australia's largest ASX listed cybersecurity company (ASX:TNT).” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 22 | 2 | ||||
“Products and services” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 23 | 1 | ||||
“Proudly Australian-owned, InTec1 is a leading provider of professional security consulting services to the government, commercial and critical infrastructure sectors.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 24 | 1 | ||||
“Global Sentynel is a consulting company that commenced operations in June 2023 in Australia, the United States, and Mexico.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 25 | 1 | ||||
“4walls helps directors, owners and executives answer three big questions: Where do we stand?” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 82 security auditing firms based in Melbourne, Australia
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Security auditing firms based in Melbourne, Australia at a glance
As of Sep 6, 2026Companies by employee count
Email recency for this list is measured across the whole Australia list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for Melbourne, over 82 companies.
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 Melbourne, 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 Melbourne 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, 218 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 in Australia
- Security auditing firms in Sydney101
- Security auditing firms in Melbourne82
- Security auditing firms in Brisbane35
- Security auditing firms in Canberra26
Frequently asked
How many security auditing firms are there based in Melbourne, Australia?
RevenueBase identified 82 security auditing firms headquartered in Melbourne, 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 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 218 verified decision-maker contacts tracked across these 82 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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