Company lists · Data verified August 2026

Top 25 Enterprise cybersecurity companies based in Australia

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 656 companies tracked

There are 656 enterprise cybersecurity companies headquartered in Australia (RevenueBase, August 2026). RevenueBase tracks 6,587 professional contacts across them, including 2,706 with verified work emails and 401 with mobile numbers. Sydney is the largest hub.

This list covers enterprise cybersecurity companies 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.

656Companies

6,587Contacts tracked

2,706Verified emails

401Mobile numbers

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The 25 largest enterprise cybersecurity companies based in Australia

Ranked by team size

Top 25 of 656 enterprise cybersecurity companies 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	Triskele Labs	Melbourne	51-200	123	89
5	Optic Security Group	Broome	201-500	122	92
6	Infotrust	Sydney	201-500	122	81
7	Renew IT	Canning Vale	51-200	113	55
8	RED Sift	Surry Hills	51-200	109	55
9	Aucyber	Fortitude Valley	51-200	105	5
10	Secutec	Sydney	51-200	102	37
11	Sekuro	n/a	51-200	100	70
12	Ever Nimble	Fortitude Valley	51-200	98	79
13	Kaine Mathrick Tech	Sydney	51-200	91	62
14	Secure Agility	Sydney	51-200	87	76
15	Northbridge Systems	St Leonards	51-200	70	27
16	Ampion	Melbourne	501-1,000	64	21
17	Entersoft Security	Brisbane	51-200	63	20
18	Skillfield	Melbourne	51-200	61	42
19	RED Piranha	Melbourne	51-200	58	41
20	3columns	n/a	51-200	58	32
21	Deploypartners	North Sydney	51-200	51	24
22	Dimiya Tech	Melbourne	51-200	50	2
23	Emerging IT	Mulgrave	51-200	45	27
24	Firstwave ASX FCT	North Sydney	51-200	42	26
25	Vectra	Melbourne	51-200	42	19

Showing 25 of 656 enterprise cybersecurity companies based in Australia

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Enterprise cybersecurity companies based in Australia at a glance

As of Aug 28, 2026

1-10Median size (employees)

SydneyLargest hub · 145 HQs

401Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

372

11-50

210

51-200

201-500

501-1,000

1,001-5,000

Enterprise cybersecurity companies by metro

Metro	Companies
Enterprise cybersecurity companies in Sydney	145
Enterprise cybersecurity companies in Melbourne	133
Enterprise cybersecurity companies in Brisbane	53
Enterprise cybersecurity companies in Canberra	36
Enterprise cybersecurity companies in Perth	32
Enterprise cybersecurity companies in Adelaide	24
Enterprise cybersecurity companies in North Sydney	12

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 “enterprise cybersecurity companies”, 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; 0 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 enterprise cybersecurity companies are there based in Australia?

There are 656 enterprise cybersecurity companies 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 enterprise cybersecurity companies?

Sydney leads with 145 headquartered companies, followed by Melbourne (133) and Brisbane (53).

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 2,706 verified decision-maker contacts tracked across these 656 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.