Company lists · Data verified August 2026

Top 25 Cybersecurity service providers based in Australia

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 1,084 companies tracked

There are 1,084 cybersecurity service providers headquartered in Australia (RevenueBase, August 2026). RevenueBase tracks 10,567 professional contacts across them, including 4,729 with verified work emails and 622 with mobile numbers. Sydney is the largest hub.

This list covers cybersecurity service providers 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.

1,084Companies

10,567Contacts tracked

4,729Verified emails

622Mobile numbers

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The 25 largest cybersecurity service providers based in Australia

Ranked by team size

Top 25 of 1,084 cybersecurity service providers 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	Virtual IT Group Vitg	Sydney	201-500	165	129
5	Triskele Labs	Melbourne	51-200	123	89
6	Optic Security Group	Broome	201-500	122	92
7	Infotrust	Sydney	201-500	122	81
8	NEW ERA Technology AU	Belmont	501-1,000	112	81
9	RED Sift	Surry Hills	51-200	109	55
10	Secutec	Sydney	51-200	102	37
11	Sekuro	n/a	51-200	100	70
12	Ever Nimble	Fortitude Valley	51-200	98	79
13	Advance Vision Technology	Port Melbourne	51-200	95	32
14	Kaine Mathrick Tech	Sydney	51-200	91	62
15	Secure Agility	Sydney	51-200	87	76
16	Northbridge Systems	St Leonards	51-200	70	27
17	Entersoft Security	Brisbane	51-200	63	20
18	Skillfield	Melbourne	51-200	61	42
19	E2e-Assure	Canberra	51-200	60	42
20	RED Piranha	Melbourne	51-200	58	41
21	3columns	n/a	51-200	58	32
22	Deploypartners	North Sydney	51-200	51	24
23	Dimiya Tech	Melbourne	51-200	50	2
24	Oneteam IT PTY LTD	St Leonards	51-200	47	42
25	Firstwave ASX FCT	North Sydney	51-200	42	26

Showing 25 of 1,084 cybersecurity service providers based in Australia

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Cybersecurity service providers based in Australia at a glance

As of Aug 28, 2026

1-10Median size (employees)

SydneyLargest hub · 210 HQs

622Contacts with mobile numbers

5Emails re-verified in last 30 days

Companies by employee count

1-10

647

11-50

333

51-200

201-500

501-1,000

1,001-5,000

Cybersecurity service providers by metro

Metro	Companies
Cybersecurity service providers in Sydney	210
Cybersecurity service providers in Melbourne	192
Cybersecurity service providers in Brisbane	85
Cybersecurity service providers in Canberra	50
Cybersecurity service providers in Perth	48
Cybersecurity service providers in Adelaide	40
Cybersecurity service providers in North Sydney	19

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 service providers”, 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; 5 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 service providers are there based in Australia?

There are 1,084 cybersecurity service providers 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 service providers?

Sydney leads with 210 headquartered companies, followed by Melbourne (192) 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 4,729 verified decision-maker contacts tracked across these 1,084 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.