Company lists · Data verified August 2026

Top 25 Cybersecurity incident response based in Australia

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 219 companies tracked

There are 219 cybersecurity incident response headquartered in Australia (RevenueBase, August 2026). RevenueBase tracks 2,195 professional contacts across them, including 887 with verified work emails and 119 with mobile numbers. Sydney is the largest hub.

This list covers cybersecurity incident response 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.

219Companies

2,195Contacts tracked

887Verified emails

119Mobile numbers

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The 25 largest cybersecurity incident response based in Australia

Ranked by team size

Top 25 of 219 cybersecurity incident response 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	Triskele Labs	Melbourne	51-200	123	89
2	Secutec	Sydney	51-200	102	37
3	Sekuro	n/a	51-200	100	70
4	Northbridge Systems	St Leonards	51-200	70	27
5	E2e-Assure	Canberra	51-200	60	42
6	Ipsec PTY LTD	Cremorne	11-50	57	35
7	Emerging IT	Mulgrave	51-200	45	27
8	Slipstream Cyber	St Leonards	11-50	42	28
9	Vectra	Melbourne	51-200	42	19
10	Seccom Global	Sydney	11-50	41	30
11	Division 5	Brisbane	11-50	36	25
12	Ionize	Canberra	51-200	34	26
13	OP Innovate	Canberra	11-50	34	21
14	Terraeagle	Strathfield	11-50	34	3
15	NSB Cyber	Brisbane	11-50	30	19
16	Cybernara	Adelaide	11-50	29	5
17	Infinitesol	Melbourne	11-50	27	1
18	GCIT	Burleigh Heads	11-50	19	8
19	NCC Group Apac	Sydney	1,001-5,000	18	8
20	Retrospect Labs	Melbourne	11-50	17	10
21	Sinevis	n/a	11-50	17	6
22	Cube Cyber	Perth	11-50	16	13
23	Secure ISS	Southport	11-50	16	9
24	Sentaris	Sydney	11-50	14	9
25	Spartans Security	Cremorne	11-50	14	8

Showing 25 of 219 cybersecurity incident response based in Australia

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 887 reachable decision-makers.

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Cybersecurity incident response based in Australia at a glance

As of Aug 28, 2026

1-10Median size (employees)

SydneyLargest hub · 55 HQs

119Contacts with mobile numbers

2Emails re-verified in last 30 days

Companies by employee count

1-10

121

11-50

51-200

201-500

1,001-5,000

Cybersecurity incident response by metro

Metro	Companies
Cybersecurity incident response in Sydney	55
Cybersecurity incident response in Melbourne	45
Cybersecurity incident response in Brisbane	16
Cybersecurity incident response in Perth	15
Cybersecurity incident response in Canberra	11
Cybersecurity incident response in Brisbane City	5
Cybersecurity incident response in Adelaide	4

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 incident response”, 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 incident response are there based in Australia?

There are 219 cybersecurity incident response headquartered in Australia as of August 2026 (RevenueBase).

What is the largest company on this list?

Triskele Labs, headquartered in Melbourne, tops this list with the largest team on record.

Which city has the most cybersecurity incident response?

Sydney leads with 55 headquartered companies, followed by Melbourne (45) and Brisbane (16).

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 887 verified decision-maker contacts tracked across these 219 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.