Company lists · Data refreshed September 2026

Top 24 IT security companies based in Australia

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

Compiled by the RevenueBase Data Team Data refreshed Sep 4, 2026 692 companies tracked

RevenueBase identified 692 IT security companies headquartered in Australia as of September 2026 and tracks 7,695 professional contacts across them, including 3,449 with verified work emails and 445 with mobile numbers. Sydney is the largest hub.

This list covers IT security 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 4, 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 4, 2026 86% judged on-target in blind review

692Companies

7,695Contacts tracked

3,449Verified emails

445Mobile numbers

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The 24 largest IT security companies based in Australia

Ranked by team size

Top 24 of 692 IT security companies based in Australia, ranked by team size, largest first. Data refreshed Sep 4, 2026. RevenueBase Smart Search rates how each company's information relates to IT security 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	Centorrino Technologies	Partial evidence	Coburg, AustraliaHQ checked Sep 4, 2026	201-500	349 contacts →
	Partial evidence “We are an Australian-owned, full-service ICT Solutions and Cyber Security provider with a locally based team of over 450 passionate Aussies.” Source: RevenueBase Database · checked Sep 4, 2026
2	Triskele Labs	Indirect evidence	Melbourne, AustraliaHQ checked Sep 4, 2026	51-200	123 contacts →
	Indirect evidence “Triskele Labs is one of Australia’s fastest growing cybersecurity companies.” Source: RevenueBase Database · checked Sep 4, 2026
3	Optic Security Group	Partial evidence	Brisbane Airport, AustraliaHQ checked Sep 4, 2026	201-500	122 contacts →
	Partial evidence “Optic Security Group is a leading provider of converged security risk management solutions serving the needs of corporate, enterprise, and government clients across Australia and…” Source: RevenueBase Database · checked Sep 4, 2026
4	Infotrust	Partial evidence	Sydney, AustraliaHQ checked Sep 4, 2026	201-500	122 contacts →
	Partial evidence “Infotrust (ITS) is Australia’s leading cyber security and managed technology services provider listed on the ASX.” Source: RevenueBase Database · checked Sep 4, 2026
5	Renew IT	Strong evidence	Lane Cove West, AustraliaHQ checked Sep 4, 2026	51-200	113 contacts →
	Strong evidence “Innovative Managed Services: Bridging Assets, Systems, and Security Welcome to Renew IT, your trusted partner in delivering comprehensive managed services, systems integration…” Source: RevenueBase Database · checked Sep 4, 2026
6	ARA Security	Partial evidence	Kingsgrove, AustraliaHQ checked Sep 4, 2026	201-500	105 contacts →
	Partial evidence “ARA Security delivers turnkey security solutions to a number of industries across Australia.” Source: RevenueBase Database · checked Sep 4, 2026
7	Sekuro	Partial evidence	AustraliaHQ checked Sep 4, 2026	51-200	100 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 4, 2026
8	Ever Nimble	Strong evidence	West Perth, AustraliaHQ checked Sep 4, 2026	51-200	98 contacts →
	Strong evidence “We are your IT & Cyber Security partners.” Source: RevenueBase Database · checked Sep 4, 2026
9	Kaine Mathrick Tech	Indirect evidence	Port Melbourne, AustraliaHQ checked Sep 4, 2026	51-200	91 contacts →
	Indirect evidence “Australia’s cyber-first Managed Service Provider and true technology partner.” Source: RevenueBase Database · checked Sep 4, 2026
10	Secure Agility	Partial evidence	Sydney, AustraliaHQ checked Sep 4, 2026	51-200	87 contacts →
	Partial evidence “Secure Agility is a Australian-based technology partner specialising in secure managed IT services for NSW government, enterprise and mid-market organisations.” Source: RevenueBase Database · checked Sep 4, 2026
11	Northbridge Systems	Partial evidence	St Leonards, AustraliaHQ checked Sep 4, 2026	51-200	70 contacts →
	Partial evidence “Northbridge is an Australian-owned cybersecurity services provider with more than 25 years’ experience delivering engineered, integrated and fully managed security services to…” Source: RevenueBase Database · checked Sep 4, 2026
12	Entersoft Security	Partial evidence	Brisbane, AustraliaHQ checked Sep 4, 2026	51-200	63 contacts →
	Partial evidence “Entersoft Security is an AI-enabled cybersecurity services firm helping modern enterprises build, ship, and operate secure digital products at scale.” Source: RevenueBase Database · checked Sep 4, 2026
13	RED Piranha	Indirect evidence	Perth, AustraliaHQ checked Sep 4, 2026	51-200	58 contacts →
	Indirect evidence “Australia’s leading developer and manufacturer of advanced cybersecurity technology, Red Piranha delivers next-generation cyber defence solutions designed to protect modern…” Source: RevenueBase Database · checked Sep 4, 2026
14	3columns	Partial evidence	AustraliaHQ checked Sep 4, 2026	51-200	58 contacts →
	Partial evidence “Discover 3Columns, your premier destination for cutting-edge cyber security solutions.” Source: RevenueBase Database · checked Sep 4, 2026
15	Ipsec PTY LTD	Partial evidence	Cremorne, AustraliaHQ checked Sep 4, 2026	11-50	57 contacts →
	Partial 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 4, 2026
16	Fortis Security	Partial evidence	Melbourne, AustraliaHQ checked Sep 4, 2026	51-200	51 contacts →
	Partial evidence “Welcome to Fortis Security, founded in September of 2013, Fortis has grown year on year with customer support.” Source: RevenueBase Database · checked Sep 4, 2026
17	Deploypartners	Indirect evidence	North Sydney, AustraliaHQ checked Sep 4, 2026	51-200	51 contacts →
	Indirect evidence “DeployPartners offer unique values and benefits that enable our clients and partners to differentiate on customer service.” Source: RevenueBase Database · checked Sep 4, 2026
18	Wipro Shelde	Indirect evidence	Melbourne, AustraliaHQ checked Sep 4, 2026	51-200	50 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 4, 2026
19	Dimiya Tech	Partial evidence	Melbourne, AustraliaHQ checked Sep 4, 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 4, 2026
20	Emerging IT	Indirect evidence	Mulgrave, AustraliaHQ checked Sep 4, 2026	51-200	45 contacts →
	Indirect evidence “Clarity in a complex world.” Source: RevenueBase Database · checked Sep 4, 2026
21	Slipstream Cyber	Indirect evidence	Perth, AustraliaHQ checked Sep 4, 2026	11-50	42 contacts →
	Indirect evidence “Slipstream Cyber is a business of Interactive - Australia's leading technology solutions provider.” Source: RevenueBase Database · checked Sep 4, 2026
22	Firstwave ASX FCT	Indirect evidence	North Sydney, AustraliaHQ checked Sep 4, 2026	51-200	42 contacts →
	Indirect evidence “FirstWave is a global cybersecurity technology company formed in 2004.” Source: RevenueBase Database · checked Sep 4, 2026
23	Cythera	Partial evidence	Cbd, AustraliaHQ checked Sep 4, 2026	11-50	42 contacts →
	Partial 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 4, 2026
24	Vectra	Partial evidence	Adelaide, AustraliaHQ checked Sep 4, 2026	51-200	42 contacts →
	Partial evidence “Vectra, an Ensign company, is Australia’s trusted partner for security consulting, risk management, compliance, and managed services.” Source: RevenueBase Database · checked Sep 4, 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 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 companies.
Partial evidence: Its own public description names part of IT security 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 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 24 of 692 IT security companies based in Australia

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IT security companies based in Australia at a glance

As of Sep 4, 2026

44.8%Verified-email coverage

5.8%Mobile-number coverage

11.1Average contacts per company

1-10Median size (employees)

20.7%Largest-city concentration · Sydney

Sep 4, 2026Page data refreshed

Companies by employee count

1-10

412

11-50

210

51-200

201-500

501-1,000

1,001-5,000

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

00–30

30431–60

1,95461–90

1,16890–180

23180+

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 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 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 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 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, 3,449 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 4, 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 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 IT security 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 companies are there based in Australia?

RevenueBase identified 692 IT security 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?

Centorrino Technologies, headquartered in Coburg, tops this list with the largest team on record.

Which city has the most IT security companies?

Sydney leads with 143 headquartered companies, followed by Melbourne (124) and Brisbane (60).

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 3,449 verified decision-maker contacts tracked across these 692 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 4, 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.