Company lists · Data verified August 2026

Top 25 Defense software development companies based in Australia

Name: Defense software development companies based in Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 43 companies tracked

There are 43 defense software development companies headquartered in Australia (RevenueBase, August 2026). RevenueBase tracks 2,080 professional contacts across them, including 599 with verified work emails and 131 with mobile numbers. Canberra is the largest hub.

This list covers defense software development 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.

43Companies

2,080Contacts tracked

599Verified emails

131Mobile numbers

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The 25 largest defense software development companies based in Australia

Ranked by team size

Top 25 of 43 defense software development 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	Leidos Australia	Scoresby	1,001-5,000	965	30
2	4c Strategies	Brisbane City	201-500	214	137
3	Aurizn	Adelaide	201-500	157	114
4	Thomas Global Systems	Sydney Olympic Park	51-200	96	54
5	AVI PTY LTD	Symonston	51-200	59	42
6	C4i	Melbourne	51-200	59	27
7	Simcentric	Albury	51-200	56	37
8	Acacia Systems	Hendon	51-200	44	31
9	Bluerydge	Fyshwick	51-200	39	28
10	Softel Systems	Melbourne	11-50	38	26
11	Rfteq PTY LTD	Torrensville	11-50	22	17
12	X-Rd	Canberra	11-50	21	11
13	Advanced Design Technology PTY LTD	Canberra	11-50	15	13
14	Cognitive Advantage	Braddon	1-10	14	6
15	Temsconsu	Brisbane	11-50	8	3
16	Penten	n/a	51-200	7	5
17	Fulcrum Design	Canberra	11-50	5	4
18	Ebor Computing	n/a	11-50	5	2
19	Codehaus PTY LTD	Mawson Lakes	1-10	5	2
20	Astute Systems	Fortitude Valley	1-10	4	3
21	Athlan Technologies	Melbourne	11-50	4	1
22	Digital Dilemma	Sydney	1-10	3	2
23	Hillworth Solutions	Adelaide	1-10	2	2
24	Congruent Labs PTY LTD	Canberra	1-10	2	1
25	Compile	Gold Coast	1-10	2	1

Showing 25 of 43 defense software development companies based in Australia

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Defense software development companies based in Australia at a glance

As of Aug 28, 2026

11-50Median size (employees)

CanberraLargest hub · 6 HQs

131Contacts with mobile numbers

1Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

10001+

Defense software development companies by metro

Metro	Companies
Defense software development companies in Canberra	6
Defense software development companies in Melbourne	5
Defense software development companies in Adelaide	4
Defense software development companies in Fortitude Valley	2
Defense software development companies in Brisbane	2
Defense software development companies in Sydney	2
Defense software development companies in Belconnen	1

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 “defense software development 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 defense software development companies are there based in Australia?

There are 43 defense software development companies headquartered in Australia as of August 2026 (RevenueBase).

What is the largest company on this list?

Leidos Australia, headquartered in Scoresby, tops this list with the largest team on record.

Which city has the most defense software development companies?

Canberra leads with 6 headquartered companies, followed by Melbourne (5) and Adelaide (4).

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 599 verified decision-maker contacts tracked across these 43 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.