Company lists · Data refreshed September 2026

Top 25 Cybersecurity IT support companies based in Australia

Name: Cybersecurity IT support 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 1,563 companies tracked

RevenueBase identified 1,563 cybersecurity IT support companies headquartered in Australia as of September 2026 and tracks 13,356 professional contacts across them, including 6,209 with verified work emails. Sydney is the largest hub.

This list covers cybersecurity IT support 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

1,563Companies

13,356Contacts tracked

6,209Verified emails

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The 25 largest cybersecurity IT support companies based in Australia

Ranked by team size

Top 25 of 1,563 cybersecurity IT support 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 IT support 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	Ac3	Indirect evidence	Haymarket, AustraliaHQ checked Sep 21, 2026	201-500	365 contacts →
	Indirect evidence “AC3 is a leading Australian-owned and operated technology services provider helping organisations across government, healthcare, financial services, and critical infrastructure…” Source: RevenueBase Database · checked Sep 21, 2026
2	Centorrino Technologies	Indirect evidence	Coburg, AustraliaHQ checked Sep 21, 2026	201-500	352 contacts →
	Indirect 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 21, 2026
3	The Missing Link	Indirect evidence	North Sydney, AustraliaHQ checked Sep 21, 2026	201-500	222 contacts →
	Indirect evidence “For over 28 years, The Missing Link has been a trusted technology partner to enterprise, government and high-growth businesses across Australia.” Source: RevenueBase Database · checked Sep 21, 2026
4	Tecala Group	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	201-500	179 contacts →
	Indirect evidence “Tecala is an award-winning Australian technology partner, helping mid-market organisations navigate complexity and accelerate transformation with confidence.” Source: RevenueBase Database · checked Sep 21, 2026
5	Intuit Technologies	Partial evidence	Hobart, AustraliaHQ checked Sep 21, 2026	51-200	172 contacts →
	Partial evidence “Intuit Technologies is a Tasmanian-owned national IT services provider, with offices across Tasmania, Victoria, and Queensland.” Source: RevenueBase Database · checked Sep 21, 2026
6	Virtual IT Group Vitg	Strong evidence	Sydney, AustraliaHQ checked Sep 21, 2026	201-500	167 contacts →
	Strong evidence “Virtual IT Group is Australia & New Zealand's leading managed IT cybersecurity provider.” Source: RevenueBase Database · checked Sep 21, 2026
7	Ongc Systems	Partial evidence	Arundel, AustraliaHQ checked Sep 21, 2026	n/a	166 contacts →
	Partial evidence “ONGC Systems provides businesses with comprehensive IT services, that automate and streamline operations, reduce risk and increase stability while lowering the cost of system…” Source: RevenueBase Database · checked Sep 21, 2026
8	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
9	Infotrust	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	201-500	122 contacts →
	Indirect evidence “Infotrust (ITS) is Australia’s leading cyber security and managed technology services provider listed on the ASX.” Source: RevenueBase Database · checked Sep 21, 2026
10	Exigo Tech	Indirect evidence	Norwest, AustraliaHQ checked Sep 21, 2026	51-200	119 contacts →
	Indirect evidence “At Exigo Tech, we believe that technology should be simple, accessible, and a catalyst for business success.” Source: RevenueBase Database · checked Sep 21, 2026
11	Diamond IT	Strong evidence	Warabrook, AustraliaHQ checked Sep 21, 2026	51-200	118 contacts →
	Strong evidence “Diamond IT is an Australian technology partner supporting organisations since 1996 with solutions that improve business outcomes, reduce risk, and enable sustainable growth.” Source: RevenueBase Database · checked Sep 21, 2026
12	Renew IT	Partial evidence	Lane Cove West, AustraliaHQ checked Sep 21, 2026	51-200	115 contacts →
	Partial 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 21, 2026
13	Office Solutions IT	Partial evidence	Osborne Park, AustraliaHQ checked Sep 21, 2026	51-200	114 contacts →
	Partial evidence “IT to smile about.” Source: RevenueBase Database · checked Sep 21, 2026
14	NEW ERA Technology AU	Indirect evidence	Mascot, AustraliaHQ checked Sep 21, 2026	501-1,000	111 contacts →
	Indirect evidence “New Era delivers Technology Solutions that securely connect people, places, and information in a rapidly changing digital world.” Source: RevenueBase Database · checked Sep 21, 2026
15	Sekuro	Indirect evidence	AustraliaHQ checked Sep 21, 2026	51-200	104 contacts →
	Indirect 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 21, 2026
16	Ever Nimble	Partial evidence	West Perth, AustraliaHQ checked Sep 21, 2026	51-200	102 contacts →
	Partial evidence “We are your IT & Cyber Security partners.” Source: RevenueBase Database · checked Sep 21, 2026
17	Advance Vision Technology	Partial evidence	Vic, AustraliaHQ checked Sep 21, 2026	51-200	96 contacts →
	Partial evidence “Advance Vision Technology (AVTech) is a leading managed service provider with a focus on cyber-security, ‘making IT Happen’ for our customers since 1992.” Source: RevenueBase Database · checked Sep 21, 2026
18	Platinum Technology	Indirect evidence	Norwest, AustraliaHQ checked Sep 21, 2026	11-50	96 contacts →
	Indirect evidence “Welcome to Platinum Technology.” Source: RevenueBase Database · checked Sep 21, 2026
19	Kaine Mathrick Tech	Indirect evidence	Port Melbourne, AustraliaHQ checked Sep 21, 2026	51-200	93 contacts →
	Indirect evidence “Australia’s cyber-first Managed Service Provider and true technology partner.” Source: RevenueBase Database · checked Sep 21, 2026
20	Experteq	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	51-200	90 contacts →
	Partial evidence “With a proven track record of 30 years, experteq is a proudly Australian IT company that combines the strengths of two storied brands – TAS and Experteq – to deliver outstanding…” Source: RevenueBase Database · checked Sep 21, 2026
21	ORETA	Partial evidence	Docklands, AustraliaHQ checked Sep 21, 2026	51-200	89 contacts →
	Partial evidence “Oreta is an Australian technology company helping organisations cut through complexity and achieve real business outcomes across cloud, cybersecurity, networking, and digital…” Source: RevenueBase Database · checked Sep 21, 2026
22	Secure Agility	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 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 21, 2026
23	Comunet	Partial evidence	Adelaide, AustraliaHQ checked Sep 21, 2026	51-200	85 contacts →
	Partial evidence “For over 25 years we have been designing and implementing IT strategies that leverage technology to achieve business objectives for small businesses, through to enterprise…” Source: RevenueBase Database · checked Sep 21, 2026
24	CNS	Indirect evidence	North Sydney, AustraliaHQ checked Sep 21, 2026	51-200	76 contacts →
	Indirect evidence “CNS takes pride in our ability to deliver successful solutions to our customers.” Source: RevenueBase Database · checked Sep 21, 2026
25	Stickmancyber	Indirect evidence	Macquarie Park, AustraliaHQ checked Sep 21, 2026	51-200	72 contacts →
	Indirect evidence “At StickmanCyber we are on a mission to create a digital world that is safe for everyone.” 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 IT support 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 IT support companies.
Partial evidence: Its own public description names part of cybersecurity IT support companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity IT support 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 1,563 cybersecurity IT support companies based in Australia

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Cybersecurity IT support companies based in Australia at a glance

As of Sep 21, 2026

46.5%Verified-email coverage

8.5Average contacts per company

1-10Median size (employees)

14.4%Largest-city concentration · Sydney

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

985

11-50

465

51-200

201-500

501-1,000

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 1,563 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 IT support 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 IT support 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 IT support 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 IT support 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, 6,209 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 IT support 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 IT support 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 IT support companies are there based in Australia?

RevenueBase identified 1,563 cybersecurity IT support 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?

Ac3, headquartered in Haymarket, tops this list with the largest team on record.

Which city has the most cybersecurity IT support companies?

Sydney leads with 225 headquartered companies, followed by Melbourne (212) and Brisbane (83).

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 6,209 verified decision-maker contacts tracked across these 1,563 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.