Company lists · Data verified August 2026

Top 25 Cybersecurity risk assessment firms based in Australia

Name: Cybersecurity risk assessment firms 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 cybersecurity risk assessment firms headquartered in Australia (RevenueBase, August 2026). RevenueBase tracks 6,099 professional contacts across them, including 2,483 with verified work emails and 312 with mobile numbers. Sydney is the largest hub.

This list covers cybersecurity risk assessment 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.

656Companies

6,099Contacts tracked

2,483Verified emails

312Mobile numbers

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The 25 largest cybersecurity risk assessment firms based in Australia

Ranked by team size

Top 25 of 656 cybersecurity risk assessment 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	Triskele Labs	Melbourne	51-200	123	89
3	Optic Security Group	Broome	201-500	122	92
4	RED Sift	Surry Hills	51-200	109	55
5	Secutec	Sydney	51-200	102	37
6	Sekuro	n/a	51-200	100	70
7	Kaine Mathrick Tech	Sydney	51-200	91	62
8	Northbridge Systems	St Leonards	51-200	70	27
9	Entersoft Security	Brisbane	51-200	63	20
10	Skillfield	Melbourne	51-200	61	42
11	3columns	n/a	51-200	58	32
12	Ipsec PTY LTD	Cremorne	11-50	57	35
13	Ctrl Cyber	Sydney	51-200	56	27
14	Wipro Shelde	Melbourne	51-200	50	15
15	Dimiya Tech	Melbourne	51-200	50	2
16	Slipstream Cyber	St Leonards	11-50	42	28
17	Firstwave ASX FCT	North Sydney	51-200	42	26
18	Vectra	Melbourne	51-200	42	19
19	Ionize	Canberra	51-200	34	26
20	Terraeagle	Strathfield	11-50	34	3
21	NUEVA	Sydney	51-200	30	15
22	GCIT	Burleigh Heads	11-50	19	8
23	NCC Group Apac	Sydney	1,001-5,000	18	8
24	Cybersecon	Melbourne	11-50	18	6
25	Retrospect Labs	Melbourne	11-50	17	10

Showing 25 of 656 cybersecurity risk assessment firms based in Australia

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 2,483 reachable decision-makers.

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Cybersecurity risk assessment firms based in Australia at a glance

As of Aug 28, 2026

1-10Median size (employees)

SydneyLargest hub · 144 HQs

312Contacts with mobile numbers

4Emails re-verified in last 30 days

Companies by employee count

1-10

426

11-50

178

51-200

201-500

1,001-5,000

Cybersecurity risk assessment firms by metro

Metro	Companies
Cybersecurity risk assessment firms in Sydney	144
Cybersecurity risk assessment firms in Melbourne	141
Cybersecurity risk assessment firms in Brisbane	61
Cybersecurity risk assessment firms in Canberra	46
Cybersecurity risk assessment firms in Perth	32
Cybersecurity risk assessment firms in Adelaide	24
Cybersecurity risk assessment firms in Brisbane City	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 “cybersecurity risk assessment 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; 4 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 risk assessment firms are there based in Australia?

There are 656 cybersecurity risk assessment 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 risk assessment firms?

Sydney leads with 144 headquartered companies, followed by Melbourne (141) and Brisbane (61).

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 2,483 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.