Company lists · Data verified August 2026

Top 25 Cybersecurity firms based in Australia

Name: Cybersecurity firms based in Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 990 companies tracked

There are 990 cybersecurity firms headquartered in Australia (RevenueBase, August 2026). RevenueBase tracks 10,054 professional contacts across them, including 4,345 with verified work emails and 599 with mobile numbers. Sydney is the largest hub.

This list covers cybersecurity firms headquartered in Australia, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

990Companies

10,054Contacts tracked

4,345Verified emails

599Mobile numbers

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The 25 largest cybersecurity firms based in Australia

Ranked by team size

Top 25 of 990 cybersecurity firms based in Australia, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	PT Itsec Asia TBK	Melbourne	201-500	387	67
2	Centorrino Technologies	Coburg	201-500	349	207
3	Webroot	Chatswood	501-1,000	199	75
4	Virtual IT Group Vitg	Sydney	201-500	165	129
5	Triskele Labs	Melbourne	51-200	123	89
6	Optic Security Group	Broome	201-500	122	92
7	Infotrust	Sydney	201-500	122	81
8	RED Sift	Surry Hills	51-200	109	55
9	ARA Security	Wangara	201-500	105	69
10	Aucyber	Fortitude Valley	51-200	105	5
11	Secutec	Sydney	51-200	102	37
12	Sekuro	n/a	51-200	100	70
13	Consunet PTY LTD	Adelaide	51-200	99	74
14	Ever Nimble	Fortitude Valley	51-200	98	79
15	Kaine Mathrick Tech	Sydney	51-200	91	62
16	Informatech PTY LTD	Canberra	51-200	90	36
17	Secure Agility	Sydney	51-200	87	76
18	Northbridge Systems	St Leonards	51-200	70	27
19	Entersoft Security	Brisbane	51-200	63	20
20	Skillfield	Melbourne	51-200	61	42
21	E2e-Assure	Canberra	51-200	60	42
22	Archtis	Barton	51-200	58	40
23	3columns	n/a	51-200	58	32
24	Ctrl Cyber	Sydney	51-200	56	27
25	Practice Protect	Brisbane	51-200	54	23

Showing 25 of 990 cybersecurity firms based in Australia

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Cybersecurity firms based in Australia at a glance

As of Aug 28, 2026

1-10Median size (employees)

SydneyLargest hub · 212 HQs

599Contacts with mobile numbers

5Emails re-verified in last 30 days

Companies by employee count

1-10

592

11-50

295

51-200

201-500

501-1,000

1,001-5,000

Cybersecurity firms by metro

Metro	Companies
Cybersecurity firms in Sydney	212
Cybersecurity firms in Melbourne	197
Cybersecurity firms in Brisbane	96
Cybersecurity firms in Canberra	55
Cybersecurity firms in Perth	42
Cybersecurity firms in Adelaide	38
Cybersecurity firms in North Sydney	15

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “cybersecurity firms”, with match quality audited by blind human judging, and headquartered in Australia.
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: Contact records re-verify on a rolling cadence; 5 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many cybersecurity firms are there based in Australia?

There are 990 cybersecurity firms headquartered in Australia as of August 2026 (RevenueBase).

What is the largest company on this list?

PT Itsec Asia TBK, headquartered in Melbourne, tops this list with the largest team on record.

Which city has the most cybersecurity firms?

Sydney leads with 212 headquartered companies, followed by Melbourne (197) and Brisbane (96).

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 4,345 verified decision-maker contacts tracked across these 990 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.