Company lists · Data verified August 2026

Top 25 Cybersecurity audit companies based in Australia

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 395 companies tracked

There are 395 cybersecurity audit companies headquartered in Australia (RevenueBase, August 2026). RevenueBase tracks 2,708 professional contacts across them, including 1,016 with verified work emails and 122 with mobile numbers. Sydney is the largest hub.

This list covers cybersecurity audit 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.

395Companies

2,708Contacts tracked

1,016Verified emails

122Mobile numbers

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The 25 largest cybersecurity audit companies based in Australia

Ranked by team size

Top 25 of 395 cybersecurity audit 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	Triskele Labs	Melbourne	51-200	123	89
3	Sekuro	n/a	51-200	100	70
4	Entersoft Security	Brisbane	51-200	63	20
5	Wipro Shelde	Melbourne	51-200	50	15
6	Emerging IT	Mulgrave	51-200	45	27
7	Vectra	Melbourne	51-200	42	19
8	Seccom Global	Sydney	11-50	41	30
9	Ionize	Canberra	51-200	34	26
10	OP Innovate	Canberra	11-50	34	21
11	Excite Cyber	North Sydney	11-50	31	18
12	NSB Cyber	Brisbane	11-50	30	19
13	GCIT	Burleigh Heads	11-50	19	8
14	Cybersecon	Melbourne	11-50	18	6
15	Sinevis	n/a	11-50	17	6
16	Intrix Cyber Security	Sydney	11-50	16	6
17	Diesec	Sydney	51-200	15	9
18	Krash Consulting	Adelaide	11-50	15	7
19	Spartans Security	Cremorne	11-50	14	8
20	Morrisec	Sydney	11-50	14	4
21	Parabellum	Melbourne	11-50	14	4
22	Forensic IT	Melbourne	11-50	12	8
23	Cyberrisk	Melbourne	11-50	11	10
24	Cleared	Canberra	11-50	11	9
25	Cyberhub Group	Sydney	11-50	9	3

Showing 25 of 395 cybersecurity audit companies based in Australia

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Cybersecurity audit companies based in Australia at a glance

As of Aug 28, 2026

1-10Median size (employees)

SydneyLargest hub · 93 HQs

122Contacts with mobile numbers

2Emails re-verified in last 30 days

Companies by employee count

1-10

251

11-50

117

51-200

201-500

Cybersecurity audit companies by metro

Metro	Companies
Cybersecurity audit companies in Sydney	93
Cybersecurity audit companies in Melbourne	76
Cybersecurity audit companies in Brisbane	31
Cybersecurity audit companies in Canberra	26
Cybersecurity audit companies in Perth	23
Cybersecurity audit companies in Adelaide	15
Cybersecurity audit companies in Brisbane City	11

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 audit 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; 2 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 audit companies are there based in Australia?

There are 395 cybersecurity audit 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 audit companies?

Sydney leads with 93 headquartered companies, followed by Melbourne (76) and Brisbane (31).

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 1,016 verified decision-maker contacts tracked across these 395 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.