Company lists · Data refreshed September 2026

Top 25 Defense cybersecurity companies based in Melbourne, Australia

Name: Defense cybersecurity companies based in Melbourne, Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 10, 2026 70 companies tracked

RevenueBase identified 70 defense cybersecurity companies headquartered in Melbourne, Australia as of September 2026 and tracks 669 professional contacts across them, including 198 with verified work emails and 30 with mobile numbers. Sydney is the largest hub.

This list covers defense cybersecurity companies 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 10, 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 10, 2026 86% judged on-target in blind review

70Companies

669Contacts tracked

198Verified emails

30Mobile numbers

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The 25 largest defense cybersecurity companies based in Melbourne, Australia

Ranked by team size

Top 25 of 70 defense cybersecurity companies based in Melbourne, Australia, ranked by team size, largest first. Data refreshed Sep 10, 2026. RevenueBase Smart Search rates how each company's information relates to defense cybersecurity 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 10, 2026	51-200	123 contacts →
	Partial evidence “Triskele Labs is one of Australia’s fastest growing cybersecurity companies.” Source: RevenueBase Database · checked Sep 10, 2026
2	C4i	Indirect evidence	Melbourne, AustraliaHQ checked Sep 10, 2026	51-200	59 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 10, 2026
3	Dimiya Tech	Partial evidence	Melbourne, AustraliaHQ checked Sep 10, 2026	51-200	50 contacts →
	Partial evidence “DIMIYA Tech is a Melbourne, Australia based- global Cybersecurity and IT services provider supporting organizations that require secure, scalable, and high-performance technology…” Source: RevenueBase Database · checked Sep 10, 2026
4	Wipro Shelde	Indirect evidence	Melbourne, AustraliaHQ checked Sep 10, 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 10, 2026
5	Borderless CS	Partial evidence	Melbourne, AustraliaHQ checked Sep 10, 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 10, 2026
6	Tanto Security	Indirect evidence	Melbourne, AustraliaHQ checked Sep 10, 2026	11-50	19 contacts →
	Indirect evidence “We provide offensive cyber security services to world leading organisations.” Source: RevenueBase Database · checked Sep 10, 2026
7	Cybersecon	Indirect evidence	Melbourne, AustraliaHQ checked Sep 10, 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 10, 2026
8	Cosive	Indirect evidence	Melbourne, AustraliaHQ checked Sep 10, 2026	11-50	13 contacts →
	Indirect evidence “We help organisations get better at Security Operations and Cyber Threat Intelligence with specialised consulting, engineering, and managed security platforms.” Source: RevenueBase Database · checked Sep 10, 2026
9	Forensic IT	Indirect evidence	Melbourne, AustraliaHQ checked Sep 10, 2026	11-50	12 contacts →
	Indirect evidence “Forensic IT is a specialised cyber security firm with expertise in Digital Forensics and Incident Response (DFIR), and securing Industrial Control Systems (CIS).” Source: RevenueBase Database · checked Sep 10, 2026
10	Secured Enterprise	Indirect evidence	Melbourne, AustraliaHQ checked Sep 10, 2026	51-200	12 contacts →
	Indirect evidence “Secured Enterprise is a globally recognized pioneer in online cyber security that collaborate with businesses in Australia, Europe, South Africa, North America, and New Zealand.” Source: RevenueBase Database · checked Sep 10, 2026
11	Security Impossible	Indirect evidence	Melbourne, AustraliaHQ checked Sep 10, 2026	1-10	8 contacts →
	Indirect evidence “Cyber Range, SOC designing and implementation, risk and security assessment.” Source: RevenueBase Database · checked Sep 10, 2026
12	Shadowlens	Indirect evidence	Melbourne, AustraliaHQ checked Sep 10, 2026	11-50	6 contacts →
	Indirect evidence “ShadowLens is a cyber-security services and solutions provider that specialises in the synergy between users and data to protect digital information.” Source: RevenueBase Database · checked Sep 10, 2026
13	Cyberzone Global	Indirect evidence	Melbourne, AustraliaHQ checked Sep 10, 2026	1-10	5 contacts →
	Indirect 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 10, 2026
14	Trinity Cyber Security	Indirect evidence	Melbourne, AustraliaHQ checked Sep 10, 2026	1-10	5 contacts →
	Indirect evidence “At Trinity we are dedicated to providing our clients with the best possible customer experience while ensuring their safety and security in the digital world.” Source: RevenueBase Database · checked Sep 10, 2026
15	Cyber Forte	Indirect evidence	Melbourne, AustraliaHQ checked Sep 10, 2026	11-50	5 contacts →
	Indirect evidence “Cyber Forte is an Australian owned Cyber Security company with headquarters in Melbourne.” Source: RevenueBase Database · checked Sep 10, 2026
16	Sicarius	Partial evidence	Melbourne, AustraliaHQ checked Sep 10, 2026	1-10	3 contacts →
	Partial evidence “Sicarius is an Australian cybersecurity firm offering three services: Beacon, a continuous security posture monitoring platform for Australian AFFORDABILITY TAILORED FOR SMALL…” Source: RevenueBase Database · checked Sep 10, 2026
17	Tawfik Consulting	Indirect evidence	Melbourne, AustraliaHQ checked Sep 10, 2026	1-10	3 contacts →
	Indirect evidence “Tawfik Consulting is a dynamic consulting company with subject matter experts is logistics, system engineering and cyber security.” Source: RevenueBase Database · checked Sep 10, 2026
18	Stratus Security	Indirect evidence	Melbourne, AustraliaHQ checked Sep 10, 2026	1-10	3 contacts →
	Indirect evidence “In a world where the digital landscape is constantly evolving and cyber threats are becoming increasingly sophisticated, it's crucial for organizations to be proactive in…” Source: RevenueBase Database · checked Sep 10, 2026
19	Pure.Security A Tesserent Company	Partial evidence	Melbourne, AustraliaHQ checked Sep 10, 2026	51-200	2 contacts →
	Partial evidence “Pure Security is part of the Tesserent group, and is rebranding as Tesserent - Australia's largest ASX listed cybersecurity company (ASX:TNT).” Source: RevenueBase Database · checked Sep 10, 2026
20	Cyber XL	Indirect evidence	Melbourne, AustraliaHQ checked Sep 10, 2026	1-10	2 contacts →
	Indirect evidence “Products and services” Source: RevenueBase Database · checked Sep 10, 2026
21	Intec1	Indirect evidence	Melbourne, AustraliaHQ checked Sep 10, 2026	51-200	1 contacts →
	Indirect evidence “Proudly Australian-owned, InTec1 is a leading provider of professional security consulting services to the government, commercial and critical infrastructure sectors.” Source: RevenueBase Database · checked Sep 10, 2026
22	ZK Tech	Indirect evidence	Melbourne, AustraliaHQ checked Sep 10, 2026	1-10	1 contacts →
	Indirect evidence “AI Managed Service Provider.” Source: RevenueBase Database · checked Sep 10, 2026
23	Cashel Group Consulting PTY LTD	Indirect evidence	Melbourne, AustraliaHQ checked Sep 10, 2026	1-10	1 contacts →
	Indirect evidence “Quality IT Security Services Cashel Group is a niche Cyber Security Services Company.” Source: RevenueBase Database · checked Sep 10, 2026
24	F8 Cybersec	Partial evidence	Melbourne, AustraliaHQ checked Sep 10, 2026	1-10	1 contacts →
	Partial evidence “Our cybersecurity services include, but are not limited to: Network Security: Fortify your network against unauthorized access, data breaches, and other cyber threats with our…” Source: RevenueBase Database · checked Sep 10, 2026
25	Alias IT	Indirect evidence	Melbourne, AustraliaHQ checked Sep 10, 2026	1-10	1 contacts →
	Indirect evidence “Cyber Security and IT Consulting Services Alias IT provides cyber security architecture, consulting and design services for enterprise-scale technology systems.” Source: RevenueBase Database · checked Sep 10, 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: defense cybersecurity 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 defense cybersecurity companies.
Partial evidence: Its own public description names part of defense cybersecurity companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name defense cybersecurity 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 70 defense cybersecurity companies based in Melbourne, Australia

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Defense cybersecurity companies based in Melbourne, Australia at a glance

As of Sep 10, 2026

29.6%Verified-email coverage

4.5%Mobile-number coverage

9.6Average contacts per company

1-10Median size (employees)

104.3%Largest-city concentration · Sydney

Sep 10, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 12.0d

1800–30

1831–60

061–90

090–180

0180+

Company record updated

Median 61.0d

00–30

31331–60

25361–90

5690–180

47180+

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 defense cybersecurity 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 Melbourne, Australia whose own description of what they do matches “defense cybersecurity 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 defense cybersecurity 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 defense cybersecurity companies, 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 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, 198 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 10, 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.

Defense cybersecurity companies by metro in Australia

Defense cybersecurity companies in Sydney73
Defense cybersecurity companies in Melbourne71
Defense cybersecurity companies in Brisbane34
Defense cybersecurity companies in Canberra28

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 defense cybersecurity 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 defense cybersecurity companies are there based in Melbourne, Australia?

RevenueBase identified 70 defense cybersecurity companies 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 defense cybersecurity companies?

Sydney leads with 73 headquartered companies, followed by Melbourne (71) and Brisbane (34).

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 198 verified decision-maker contacts tracked across these 70 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 10, 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.