Company lists · Data refreshed September 2026

Top 25 Cybersecurity testing companies based in Australia

Name: Cybersecurity testing 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 328 companies tracked

RevenueBase identified 328 cybersecurity testing companies headquartered in Australia as of September 2026 and tracks 3,451 professional contacts across them, including 1,495 with verified work emails. Sydney is the largest hub.

This list covers cybersecurity testing 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

328Companies

3,451Contacts tracked

1,495Verified emails

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The 25 largest cybersecurity testing companies based in Australia

Ranked by team size

Top 25 of 328 cybersecurity testing 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 cybersecurity testing 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	Partial evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	51-200	123 contacts →
	Partial evidence “Triskele Labs is one of Australia’s fastest growing cybersecurity companies.” Source: RevenueBase Database · checked Sep 21, 2026
2	3columns	Indirect evidence	502, AustraliaHQ checked Sep 21, 2026	51-200	61 contacts →
	Indirect evidence “Discover 3Columns, your premier destination for cutting-edge cyber security solutions.” Source: RevenueBase Database · checked Sep 21, 2026
3	Ipsec PTY LTD	Indirect evidence	Cremorne, AustraliaHQ checked Sep 21, 2026	11-50	57 contacts →
	Indirect evidence “IPSec are specialists in information asset and cyber protection; security experts who know how to mitigate cyber risk by assisting in the protection of valuable intelligence…” Source: RevenueBase Database · checked Sep 21, 2026
4	Wipro Shelde	Indirect evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	51-200	47 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 21, 2026
5	Cythera	Indirect evidence	Melbourne Cbd, AustraliaHQ checked Sep 21, 2026	11-50	42 contacts →
	Indirect evidence “Cythera’s cyber security solutions allow for the rapid deployment of Assessment, Protection, Monitoring & Response and Assurance technologies to meet the security needs of…” Source: RevenueBase Database · checked Sep 21, 2026
6	Ionize	Indirect evidence	Canberra, AustraliaHQ checked Sep 21, 2026	51-200	35 contacts →
	Indirect 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
7	NSB Cyber	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	33 contacts →
	Indirect evidence “NSB Cyber is an Australian-founded, privately owned cyber security company based in Sydney.” Source: RevenueBase Database · checked Sep 21, 2026
8	Cyberxcel	Partial evidence	Brisbane, AustraliaHQ checked Sep 21, 2026	n/a	33 contacts →
	Partial evidence “Founded by Sohail Ershadi, a distinguished cybersecurity expert with over a decade of experience in the IT industry, CyberXcel has rapidly emerged as a leader in cybersecurity…” Source: RevenueBase Database · checked Sep 21, 2026
9	Datcom Cloud	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	26 contacts →
	Partial evidence “Minimise the risk of a cybersecurity incident.” Source: RevenueBase Database · checked Sep 21, 2026
10	Borderless CS	Partial evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	11-50	26 contacts →
	Partial evidence “About Us - Australia’s leading cybersecurity specialist, delivering comprehensive protection by Australian-based consultants only-no offshore teams- 100% cybersecurity-focused…” Source: RevenueBase Database · checked Sep 21, 2026
11	Fortian	Indirect evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	11-50	25 contacts →
	Indirect evidence “Fortian is a leading Australian company specialising in cyber security, privacy, and technology risk management.” Source: RevenueBase Database · checked Sep 21, 2026
12	Gridware	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	25 contacts →
	Indirect evidence “For most organisations in Australia, a data breach can be more than a PR disaster, it could be the final chapter.” Source: RevenueBase Database · checked Sep 21, 2026
13	Silentgrid Security	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	23 contacts →
	Partial evidence “SilentGrid is an offensive security consultancy with a focus on adversary simulation and penetration testing.” Source: RevenueBase Database · checked Sep 21, 2026
14	Cyconsol	Indirect evidence	Canberra, AustraliaHQ checked Sep 21, 2026	1-10	20 contacts →
	Indirect evidence “Cyconsol is an Australian based professional service provider specialising in the delivery of cyber security and IT related business consulting and training services.” Source: RevenueBase Database · checked Sep 21, 2026
15	Surecity Networks	Partial evidence	South Melbourne, AustraliaHQ checked Sep 21, 2026	11-50	20 contacts →
	Partial evidence “SureCity Networks is an Australian Cybersecurity firm with offices in Melbourne, Sydney, Brisbane and the UK, trusted by enterprises globally.” Source: RevenueBase Database · checked Sep 21, 2026
16	CBR Cyber A Brennan Company	Partial evidence	Forrest, AustraliaHQ checked Sep 21, 2026	11-50	19 contacts →
	Partial evidence “We are Canberra's newest Cybersecurity company focusing on solutions for information security, connectivity and cloud technologies.” Source: RevenueBase Database · checked Sep 21, 2026
17	Tanto Security	Indirect evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	11-50	19 contacts →
	Indirect evidence “We provide offensive cyber security services to world leading organisations.” Source: RevenueBase Database · checked Sep 21, 2026
18	Fifth Domain	Indirect evidence	Canberra, AustraliaHQ checked Sep 21, 2026	11-50	19 contacts →
	Indirect evidence “Test, Measure, and Benchmark Cyber Workforce Capability in Real-Time What Does FIFTH DOMAIN Do?” Source: RevenueBase Database · checked Sep 21, 2026
19	Threat Intelligence	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	19 contacts →
	Indirect evidence “Threat Intelligence is different.” Source: RevenueBase Database · checked Sep 21, 2026
20	NCC Group Apac	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	1,001-5,000	18 contacts →
	Indirect evidence “NCC Group exists to make the world safer and more secure.” Source: RevenueBase Database · checked Sep 21, 2026
21	Cybersecon	Indirect evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	11-50	18 contacts →
	Indirect evidence “CyberSecOn is an Information security company with a presence in Australia, USA and India.” Source: RevenueBase Database · checked Sep 21, 2026
22	Retrospect Labs	Indirect evidence	Perth, AustraliaHQ checked Sep 21, 2026	11-50	17 contacts →
	Indirect evidence “Retrospect Labs is a specialist information security company focused on helping companies improve their security posture and resilience through realistic exercises.” Source: RevenueBase Database · checked Sep 21, 2026
23	Zynet PTY LTD	Indirect evidence	Tullamarine, AustraliaHQ checked Sep 21, 2026	11-50	17 contacts →
	Indirect 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
24	Ciso Online	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	17 contacts →
	Indirect evidence “CISO Online™ specialises in Cyber Security, Governance, Risk & Compliance (GRC), and Secure AI adoption for government agencies, large enterprises, and SMBs across Australia and…” Source: RevenueBase Database · checked Sep 21, 2026
25	VIDEN	Partial evidence	Braddon, AustraliaHQ checked Sep 21, 2026	51-200	16 contacts →
	Partial evidence “Viden is a leading Australian cyber security consultancy and cyber physical systems and digital forensics testing laboratory.” 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: cybersecurity testing 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 cybersecurity testing companies.
Partial evidence: Its own public description names part of cybersecurity testing companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity testing 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 328 cybersecurity testing companies based in Australia

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Cybersecurity testing companies based in Australia at a glance

As of Sep 21, 2026

43.3%Verified-email coverage

10.5Average contacts per company

1-10Median size (employees)

23.8%Largest-city concentration · Sydney

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

195

11-50

107

51-200

201-500

1,001-5,000

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 328 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 cybersecurity testing 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 “cybersecurity testing 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 cybersecurity testing 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 cybersecurity testing 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, 1,495 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.

Cybersecurity testing companies by metro

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 cybersecurity testing 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 cybersecurity testing companies are there based in Australia?

RevenueBase identified 328 cybersecurity testing 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 cybersecurity testing companies?

Sydney leads with 78 headquartered companies, followed by Melbourne (75) and Brisbane (29).

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 1,495 verified decision-maker contacts tracked across these 328 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.