Company lists · Data refreshed September 2026

Top 25 IT security audit companies based in Australia

Name: IT security audit companies based in Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 146 companies tracked

RevenueBase identified 146 IT security audit companies headquartered in Australia as of September 2026 and tracks 1,075 professional contacts across them, including 287 with verified work emails. Melbourne is the largest hub.

This list covers IT security audit companies 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 21, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 21, 2026 86% judged on-target in blind review

146Companies

1,075Contacts tracked

287Verified emails

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The 25 largest IT security audit companies based in Australia

Ranked by team size

Top 25 of 146 IT security audit companies based in Australia, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to IT security audit companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Triskele Labs	Indirect evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	51-200	123 contacts →
	Indirect evidence “Triskele Labs is one of Australia’s fastest growing cybersecurity companies.” Source: RevenueBase Database · checked Sep 21, 2026
2	Ionize	Strong evidence	Canberra, AustraliaHQ checked Sep 21, 2026	51-200	35 contacts →
	Strong evidence “When it comes to security there's no shortage of companies ready to tell you about your vulnerabilities.” Source: RevenueBase Database · checked Sep 21, 2026
3	Fortian	Partial evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	11-50	25 contacts →
	Partial evidence “Fortian is a leading Australian company specialising in cyber security, privacy, and technology risk management.” Source: RevenueBase Database · checked Sep 21, 2026
4	Hashlock	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	20 contacts →
	Partial evidence “Hashlock is the industry leading web3 security auditing firm.” Source: RevenueBase Database · checked Sep 21, 2026
5	Rightsec	Partial evidence	Brisbane, AustraliaHQ checked Sep 21, 2026	11-50	19 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 21, 2026
6	Cybersecon	Partial evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	11-50	18 contacts →
	Partial evidence “CyberSecOn is an Information security company with a presence in Australia, USA and India.” Source: RevenueBase Database · checked Sep 21, 2026
7	Zynet PTY LTD	Strong evidence	Tullamarine, AustraliaHQ checked Sep 21, 2026	11-50	17 contacts →
	Strong evidence “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: RevenueBase Database · checked Sep 21, 2026
8	Sentaris	Partial evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	11-50	14 contacts →
	Partial evidence “Sentaris (a certified B Corporation) is an Australian security services provider specialising in cyber assurance and incident response services.” Source: RevenueBase Database · checked Sep 21, 2026
9	Spartans Security	Indirect evidence	Cremorne, AustraliaHQ checked Sep 21, 2026	11-50	14 contacts →
	Indirect evidence “Facing the Complexities of Cybersecurity?” Source: RevenueBase Database · checked Sep 21, 2026
10	Cyber Audit Team	Strong evidence	South East Queensland, AustraliaHQ checked Sep 21, 2026	11-50	9 contacts →
	Strong evidence “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: RevenueBase Database · checked Sep 21, 2026
11	Cyber Ethos	Indirect evidence	Central Queensland, AustraliaHQ checked Sep 21, 2026	1-10	9 contacts →
	Indirect evidence “Overview: Cyber Ethos is a leading cybersecurity business based in Queensland, Australia, equipping businesses with unrivalled cybersecurity solutions.” Source: RevenueBase Database · checked Sep 21, 2026
12	Cybra Security	Partial evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	1-10	9 contacts →
	Partial evidence “Our mission is simple, make cyber security accessible to all Australian businesses.” Source: RevenueBase Database · checked Sep 21, 2026
13	Haksec Group	Indirect evidence	Sunshine Coast, AustraliaHQ checked Sep 21, 2026	1-10	8 contacts →
	Indirect evidence “Haksec is a small cybersecurity firm based in Queensland, Australia founded by Luke Stephens (hakluke).” Source: RevenueBase Database · checked Sep 21, 2026
14	Iqbox PTY LTD	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	7 contacts →
	Partial evidence “IQBOX helps you pinpoint your organization’s most pressing vulnerabilities, eliminate critical threats, and implement a security program that leaves you free to focus on…” Source: RevenueBase Database · checked Sep 21, 2026
15	The Pearson Corporation PTY LTD A Tesserent Company	Strong evidence	Canberra, AustraliaHQ checked Sep 21, 2026	51-200	6 contacts →
	Strong evidence “The Pearson Corporation is a locally owned Canberra IT Consulting firm that has proven experience and a track record for delivering ICT and Cyber Security services to both the…” Source: RevenueBase Database · checked Sep 21, 2026
16	Cyberlinx	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	1-10	6 contacts →
	Partial evidence “Cyberlinx is a premier cyber security solutions and services provider, we offer a comprehensive range of cyber security solutions, including, infrastructure and network security…” Source: RevenueBase Database · checked Sep 21, 2026
17	Gman IT	Partial evidence	Melbourne Cbd, AustraliaHQ checked Sep 21, 2026	1-10	6 contacts →
	Partial evidence “At GMAN IT our mission is to help all businesses become cyber resilient.” Source: RevenueBase Database · checked Sep 21, 2026
18	Vertex Cyber Security	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	6 contacts →
	Partial evidence “Vertex Cyber Security provides an extensive Cyber Security capability of Technology and Security Services for organisations across Sydney.” Source: RevenueBase Database · checked Sep 21, 2026
19	Information Security Consultants	Partial evidence	Point Cook, AustraliaHQ checked Sep 21, 2026	1-10	6 contacts →
	Partial evidence “At Information Security Consultants, we offer comprehensive solutions and expertise to safeguard your digital assets, mitigate risks, and ensure your information's…” Source: RevenueBase Database · checked Sep 21, 2026
20	Proveho Networks	Partial evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	11-50	5 contacts →
	Partial evidence “Secure computing and digital security transformation.” Source: RevenueBase Database · checked Sep 21, 2026
21	Irradiate Security	Partial evidence	Canberra, AustraliaHQ checked Sep 21, 2026	1-10	5 contacts →
	Partial evidence “Irradiate Security is a cyber security focused organisation that aims to promote safe online practices for Australian businesses.” Source: RevenueBase Database · checked Sep 21, 2026
22	Fort1 PTY LTD	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	1-10	5 contacts →
	Indirect evidence “Fort1: Comprehensive Cybersecurity Services based in Australia.” Source: RevenueBase Database · checked Sep 21, 2026
23	Cyberzone Global	Partial evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	1-10	5 contacts →
	Partial evidence “At CyberZone Global, we provide expert cyber advisory, security testing, consulting, Artificial Intelligence and cyber security training services tailored to your organisation’s…” Source: RevenueBase Database · checked Sep 21, 2026
24	Intact Security PTY LTD	Partial evidence	Naremburn, AustraliaHQ checked Sep 21, 2026	1-10	5 contacts →
	Partial evidence “Intact Security provides services around; security and vulnerability testing, security breaches and investigations, security awareness and compliance.” Source: RevenueBase Database · checked Sep 21, 2026
25	Secure Alley	Partial evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	11-50	5 contacts →
	Partial evidence “Secure Alley is an IT and cybersecurity company built for the realities of today’s AI-driven digital landscape.” Source: RevenueBase Database · checked Sep 21, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: IT security audit companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names IT security audit companies.
Partial evidence: Its own public description names part of IT security audit companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name IT security audit companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 146 IT security audit companies based in Australia

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IT security audit companies based in Australia at a glance

As of Sep 21, 2026

26.7%Verified-email coverage

7.4Average contacts per company

1-10Median size (employees)

24.0%Largest-city concentration · Melbourne

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Email recency for this list is measured worldwide rather than for Australia, so it is reported there. Company counts and contact totals on this page are exact for Australia, over 146 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 IT security audit companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search 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 Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Australia whose own description of what they do matches “IT security audit companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names IT security audit companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among IT security audit companies, 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 its RevenueBase Smart Search 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, 287 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 21, 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.

IT security audit companies by metro

IT security audit companies in Melbourne35
IT security audit companies in Sydney31

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names IT security audit companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many IT security audit companies are there based in Australia?

RevenueBase identified 146 IT security audit companies 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 IT security audit companies?

Melbourne leads with 35 headquartered companies, followed by Sydney (31) and Perth (9).

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 287 verified decision-maker contacts tracked across these 146 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 21, 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 Smart Search, 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.