Company lists · Data verified August 2026

Top 25 Cybersecurity and defense software companies based in Australia

Name: Cybersecurity and defense software companies based in Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 216 companies tracked

There are 216 cybersecurity and defense software companies headquartered in Australia (RevenueBase, August 2026). RevenueBase tracks 3,101 professional contacts across them, including 1,206 with verified work emails and 211 with mobile numbers. Melbourne is the largest hub.

This list covers cybersecurity and defense software 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.

216Companies

3,101Contacts tracked

1,206Verified emails

211Mobile numbers

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The 25 largest cybersecurity and defense software companies based in Australia

Ranked by team size

Top 25 of 216 cybersecurity and defense software 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	Webroot	Chatswood	501-1,000	199	75
3	Aurizn	Adelaide	201-500	157	114
4	Triskele Labs	Melbourne	51-200	123	89
5	RED Sift	Surry Hills	51-200	109	55
6	Secutec	Sydney	51-200	102	37
7	Consunet PTY LTD	Adelaide	51-200	99	74
8	Northbridge Systems	St Leonards	51-200	70	27
9	RED Piranha	Melbourne	51-200	58	41
10	Ipsec PTY LTD	Cremorne	11-50	57	35
11	Deploypartners	North Sydney	51-200	51	24
12	Wipro Shelde	Melbourne	51-200	50	15
13	Dimiya Tech	Melbourne	51-200	50	2
14	Emerging IT	Mulgrave	51-200	45	27
15	Sekuro Asia	Brisbane	51-200	43	11
16	Firstwave ASX FCT	North Sydney	51-200	42	26
17	Cythera	Cbd	11-50	42	26
18	Bluerydge	Fyshwick	51-200	39	28
19	Softel Systems	Melbourne	11-50	38	26
20	Senetas	South Melbourne	51-200	37	20
21	Ionize	Canberra	51-200	34	26
22	OP Innovate	Canberra	11-50	34	21
23	Terraeagle	Strathfield	11-50	34	3
24	NSB Cyber	Brisbane	11-50	30	19
25	Datcom Cloud	North Geelong	11-50	26	12

Showing 25 of 216 cybersecurity and defense software companies based in Australia

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Cybersecurity and defense software companies based in Australia at a glance

As of Aug 28, 2026

11-50Median size (employees)

MelbourneLargest hub · 39 HQs

211Contacts with mobile numbers

1Emails re-verified in last 30 days

Companies by employee count

1-10

104

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

Cybersecurity and defense software companies by metro

Metro	Companies
Cybersecurity and defense software companies in Melbourne	39
Cybersecurity and defense software companies in Sydney	34
Cybersecurity and defense software companies in Brisbane	20
Cybersecurity and defense software companies in Canberra	13
Cybersecurity and defense software companies in Perth	12
Cybersecurity and defense software companies in Adelaide	10
Cybersecurity and defense software companies in Brisbane City	6

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 and defense software 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; 1 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 and defense software companies are there based in Australia?

There are 216 cybersecurity and defense software 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 cybersecurity and defense software companies?

Melbourne leads with 39 headquartered companies, followed by Sydney (34) and Brisbane (20).

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 1,206 verified decision-maker contacts tracked across these 216 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.