Company lists · Data verified August 2026

Top 25 Data security consulting firms based in Australia

Name: Data security consulting firms based in Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 616 companies tracked

There are 616 data security consulting firms headquartered in Australia (RevenueBase, August 2026). RevenueBase tracks 3,872 professional contacts across them, including 1,556 with verified work emails and 203 with mobile numbers. Sydney is the largest hub.

This list covers data security consulting 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.

616Companies

3,872Contacts tracked

1,556Verified emails

203Mobile numbers

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The 25 largest data security consulting firms based in Australia

Ranked by team size

Top 25 of 616 data security consulting 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	Kaine Mathrick Tech	Sydney	51-200	91	62
5	Business Aspect	Perth	51-200	74	57
6	Ampion	Melbourne	501-1,000	64	21
7	Skillfield	Melbourne	51-200	61	42
8	Ipsec PTY LTD	Cremorne	11-50	57	35
9	Slipstream Cyber	St Leonards	11-50	42	28
10	Vectra	Melbourne	51-200	42	19
11	IPP Consulting PTY LTD	Canberra	51-200	37	24
12	Astralas	Cremorne	51-200	35	20
13	Ionize	Canberra	51-200	34	26
14	Excite Cyber	North Sydney	11-50	31	18
15	CSO Group	Sydney	11-50	29	20
16	Jigsaw Notions	Canberra	51-200	28	10
17	Novofinity	Sydney	11-50	27	16
18	CTO Group Australia	Barton	51-200	24	11
19	Anitech PTY LTD	Perth	11-50	24	11
20	Rightsec	Brisbane	11-50	19	10
21	Cybersecon	Melbourne	11-50	18	6
22	Security Centric	Sydney Cbd	11-50	16	12
23	Cocoon Data	Sydney	11-50	16	12
24	VIDEN	Braddon	51-200	16	7
25	Myrtec	Maitland	11-50	16	4

Showing 25 of 616 data security consulting firms based in Australia

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 1,556 reachable decision-makers.

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Data security consulting firms based in Australia at a glance

As of Aug 28, 2026

1-10Median size (employees)

SydneyLargest hub · 142 HQs

203Contacts with mobile numbers

4Emails re-verified in last 30 days

Companies by employee count

1-10

429

11-50

147

51-200

201-500

501-1,000

Data security consulting firms by metro

Metro	Companies
Data security consulting firms in Sydney	142
Data security consulting firms in Melbourne	121
Data security consulting firms in Brisbane	45
Data security consulting firms in Canberra	37
Data security consulting firms in Perth	32
Data security consulting firms in Adelaide	26
Data security consulting firms in Brisbane City	9

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 “data security consulting 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 data security consulting firms are there based in Australia?

There are 616 data security consulting 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 data security consulting firms?

Sydney leads with 142 headquartered companies, followed by Melbourne (121) and Brisbane (45).

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 1,556 verified decision-maker contacts tracked across these 616 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.