Company lists · Data verified August 2026

Top 25 Cybersecurity consultancy companies based in Australia

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 1,076 companies tracked

There are 1,076 cybersecurity consultancy companies headquartered in Australia (RevenueBase, August 2026). RevenueBase tracks 9,457 professional contacts across them, including 4,140 with verified work emails and 559 with mobile numbers. Sydney is the largest hub.

This list covers cybersecurity consultancy 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.

1,076Companies

9,457Contacts tracked

4,140Verified emails

559Mobile numbers

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The 25 largest cybersecurity consultancy companies based in Australia

Ranked by team size

Top 25 of 1,076 cybersecurity consultancy 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	Secutec	Sydney	51-200	102	37
8	Sekuro	n/a	51-200	100	70
9	Ever Nimble	Fortitude Valley	51-200	98	79
10	Kaine Mathrick Tech	Sydney	51-200	91	62
11	ORETA	Docklands	51-200	89	59
12	Business Aspect	Perth	51-200	74	57
13	Northbridge Systems	St Leonards	51-200	70	27
14	Ampion	Melbourne	501-1,000	64	21
15	Entersoft Security	Brisbane	51-200	63	20
16	Skillfield	Melbourne	51-200	61	42
17	RED Piranha	Melbourne	51-200	58	41
18	3columns	n/a	51-200	58	32
19	Deploypartners	North Sydney	51-200	51	24
20	Security Consulting Group PTY LTD SCG	Brisbane City	51-200	50	35
21	Dimiya Tech	Melbourne	51-200	50	2
22	Emerging IT	Mulgrave	51-200	45	27
23	Firstwave ASX FCT	North Sydney	51-200	42	26
24	Vectra	Melbourne	51-200	42	19
25	Astralas	Cremorne	51-200	35	20

Showing 25 of 1,076 cybersecurity consultancy companies based in Australia

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Cybersecurity consultancy companies based in Australia at a glance

As of Aug 28, 2026

1-10Median size (employees)

SydneyLargest hub · 221 HQs

559Contacts with mobile numbers

8Emails re-verified in last 30 days

Companies by employee count

1-10

691

11-50

293

51-200

201-500

501-1,000

1,001-5,000

Cybersecurity consultancy companies by metro

Metro	Companies
Cybersecurity consultancy companies in Sydney	221
Cybersecurity consultancy companies in Melbourne	201
Cybersecurity consultancy companies in Brisbane	85
Cybersecurity consultancy companies in Canberra	69
Cybersecurity consultancy companies in Perth	47
Cybersecurity consultancy companies in Adelaide	37
Cybersecurity consultancy companies in North Sydney	15

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 consultancy 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; 8 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 consultancy companies are there based in Australia?

There are 1,076 cybersecurity consultancy 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 consultancy companies?

Sydney leads with 221 headquartered companies, followed by Melbourne (201) and Brisbane (85).

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 4,140 verified decision-maker contacts tracked across these 1,076 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.