Company lists · Data verified August 2026

Top 18 Application security testing companies based in Sydney, Australia

Name: Application security testing companies based in Sydney, Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 27 companies tracked

There are 27 application security testing companies headquartered in Sydney, Australia (RevenueBase, August 2026). RevenueBase tracks 168 professional contacts across them, including 68 with verified work emails and 5 with mobile numbers. Sydney is the largest hub.

This list covers application security testing companies headquartered in Sydney, 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.

27Companies

168Contacts tracked

68Verified emails

5Mobile numbers

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The 18 largest application security testing companies based in Sydney, Australia

Ranked by team size

Top 18 of 27 application security testing companies based in Sydney, 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	Silentgrid Security	Sydney	11-50	22	12
2	Threat Intelligence	Sydney	11-50	19	1
3	Tanto Security	Sydney	11-50	18	10
4	Diesec	Sydney	51-200	15	9
5	Sentaris	Sydney	11-50	14	9
6	Galah Cyber	Sydney	11-50	12	6
7	Volkis	Sydney	11-50	11	5
8	DVULN	Sydney	1-10	7	4
9	Cyber Citadel	Sydney	1-10	5	2
10	Duasynt	Sydney	11-50	4	1
11	Covertthreat	Sydney	11-50	3	1
12	Aurian Security	Sydney	1-10	2	2
13	Cyberheuristic	Sydney	1-10	2	1
14	Core Sentinel	Sydney	1-10	2	1
15	Xigsaw	Sydney	1-10	2	1
16	Bugxhunter	Sydney	1-10	1	1
17	Cyberwave Information Security	Sydney	1-10	1	1
18	Intercepted	Sydney	1-10	1	1

Showing 18 of 27 application security testing companies based in Sydney, Australia

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Application security testing companies based in Sydney, Australia at a glance

As of Aug 28, 2026

1-10Median size (employees)

SydneyLargest hub · 27 HQs

5Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

Application security testing companies by metro in Australia

Metro	Companies
Application security testing companies in Sydney	27
Application security testing companies in Melbourne	23
Application security testing companies in Brisbane	10
Application security testing companies in Canberra	10
Application security testing companies in Perth	7
Application security testing companies in Adelaide	6
Application security testing companies in Sunshine Coast	2
Application security testing companies in Ramsgate	1

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 “application security testing companies”, with match quality audited by blind human judging, and headquartered in Sydney, 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; 0 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 application security testing companies are there based in Sydney, Australia?

There are 27 application security testing companies headquartered in Sydney, Australia as of August 2026 (RevenueBase).

What is the largest company on this list?

Silentgrid Security, headquartered in Sydney, tops this list with the largest team on record.

Which city has the most application security testing companies?

Sydney leads with 27 headquartered companies, followed by Melbourne (23) and Brisbane (10).

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 68 verified decision-maker contacts tracked across these 27 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.