Company lists · Data refreshed August 2026

Top 25 Application security consulting firms based in Sydney, Australia

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

Compiled by the RevenueBase Data Team Data refreshed Aug 31, 2026 59 companies tracked

RevenueBase identified 59 application security consulting firms headquartered in Sydney, Australia as of August 2026 and tracks 306 professional contacts across them, including 125 with verified work emails and 13 with mobile numbers. Sydney is the largest hub.

This list covers application security consulting firms headquartered in Sydney, Australia, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed August 31, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase Smart Search rating on every row Refreshed Aug 31, 2026 86% judged on-target in blind review

59Companies

306Contacts tracked

125Verified emails

13Mobile numbers

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The 25 largest application security consulting firms based in Sydney, Australia

Ranked by team size

Top 25 of 59 application security consulting firms based in Sydney, Australia, ranked by team size, largest first. Data refreshed Aug 31, 2026. RevenueBase Smart Search rates how each company's information relates to application security consulting firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Fortian	Partial evidence	Sydney, Australia	11-50	26 contacts →
	Partial evidence “Fortian is a leading Australian company specialising in cyber security, privacy, and technology risk management.” Source: RevenueBase Database · checked Aug 31, 2026
2	Gridware	Indirect evidence	Sydney, Australia	11-50	25 contacts →
	Indirect evidence “For most organisations in Australia, a data breach can be more than a PR disaster, it could be the final chapter.” Source: RevenueBase Database · checked Aug 31, 2026
3	Silentgrid Security	Partial evidence	Sydney, Australia	11-50	22 contacts →
	Partial evidence “SilentGrid is an offensive security consultancy with a focus on adversary simulation and penetration testing.” Source: RevenueBase Database · checked Aug 31, 2026
4	Threat Intelligence	Indirect evidence	Sydney, Australia	11-50	19 contacts →
	Indirect evidence “Threat Intelligence is different.” Source: RevenueBase Database · checked Aug 31, 2026
5	Tanto Security	Partial evidence	Sydney, Australia	11-50	18 contacts →
	Partial evidence “We provide offensive cyber security services to world leading organisations.” Source: RevenueBase Database · checked Aug 31, 2026
6	Diesec	Partial evidence	Sydney, Australia	51-200	15 contacts →
	Partial evidence “DIESEC, founded by Carl Dietzel in 2009, is dedicated to securing your most valuable asset - your data.” Source: RevenueBase Database · checked Aug 31, 2026
7	Sentaris	Partial evidence	Sydney, Australia	11-50	14 contacts →
	Partial evidence “Sentaris (a certified B Corporation) is an Australian security services provider specialising in cyber assurance and incident response services.” Source: RevenueBase Database · checked Aug 31, 2026
8	Galah Cyber	Indirect evidence	Sydney, Australia	11-50	12 contacts →
	Indirect evidence “We work with startups, scale-ups, and large enterprises to assess the maturity of their appsec programs and provide clear, contextual, and relevant guidance towards addressing…” Source: RevenueBase Database · checked Aug 31, 2026
9	Volkis	Partial evidence	Sydney, Australia	11-50	11 contacts →
	Partial evidence “Volkis is a dedicated information security consultancy that provides penetration testing, security assessment, red team, GRC, and training services at its core.” Source: RevenueBase Database · checked Aug 31, 2026
10	Cyberhub Group	Partial evidence	Sydney, Australia	11-50	9 contacts →
	Partial evidence “CyberHub was established with the aim of making Cyber Security more available to companies of all sizes.” Source: RevenueBase Database · checked Aug 31, 2026
11	Cybra Security	Partial evidence	Sydney, Australia	1-10	9 contacts →
	Partial evidence “Our mission is simple, make cyber security accessible to all Australian businesses.” Source: RevenueBase Database · checked Aug 31, 2026
12	DVULN	Indirect evidence	Sydney, Australia	1-10	7 contacts →
	Indirect evidence “Founded in 2016, Dvuln is a globally CREST-certified cybersecurity firm specialising in advanced penetration testing, adversary simulation, attacker-led threat hunting, and…” Source: RevenueBase Database · checked Aug 31, 2026
13	Iqbox PTY LTD	Partial evidence	Sydney, Australia	11-50	7 contacts →
	Partial evidence “IQBOX helps you pinpoint your organization’s most pressing vulnerabilities, eliminate critical threats, and implement a security program that leaves you free to focus on…” Source: RevenueBase Database · checked Aug 31, 2026
14	RED Cursor	Indirect evidence	Sydney, Australia	1-10	6 contacts →
	Indirect evidence “Red Cursor was born out of 20 years of experience helping secure over 800 businesses.” Source: RevenueBase Database · checked Aug 31, 2026
15	Cyber Citadel	Partial evidence	Sydney, Australia	1-10	5 contacts →
	Partial evidence “We are cyber security specialists.” Source: RevenueBase Database · checked Aug 31, 2026
16	Nsaa Security	Partial evidence	Sydney, Australia	1-10	5 contacts →
	Partial evidence “Who are NSAA Security NSAA Security team have years of experience working within highly demanding information security environments.” Source: RevenueBase Database · checked Aug 31, 2026
17	CYBIZ	Partial evidence	Sydney, Australia	1-10	4 contacts →
	Partial evidence “CyBiz is an Australian and New Zealand cyber security advisory and services firm helping organisations strengthen resilience, reduce exposure, and lead confidently through cyber…” Source: RevenueBase Database · checked Aug 31, 2026
18	Patterned Security	Partial evidence	Sydney, Australia	1-10	4 contacts →
	Partial evidence “At Patterned Security, we focus on building modern approaches to security strategy, architecture and design.” Source: RevenueBase Database · checked Aug 31, 2026
19	Covertthreat	Partial evidence	Sydney, Australia	11-50	3 contacts →
	Partial evidence “We are a cyber-security consultancy firm geared towards assessing, securing, and managing our customers’ cyber risk.” Source: RevenueBase Database · checked Aug 31, 2026
20	Sectara	Partial evidence	Sydney, Australia	1-10	2 contacts →
	Partial evidence “SECTARA (Security Threat And Risk Assessor) was created for security consultants and corporate security managers frustrated with the lack of advanced security risk assessment…” Source: RevenueBase Database · checked Aug 31, 2026
21	Undark Solutions Undark.io	Indirect evidence	Sydney, Australia	1-10	2 contacts →
	Indirect evidence “Undark Solutions, a boutique cybersecurity consultancy founded in 2009, empowers enterprises with robust offensive & defensive solutions, including preventative strategies &…” Source: RevenueBase Database · checked Aug 31, 2026
22	Aurian Security	Partial evidence	Sydney, Australia	1-10	2 contacts →
	Partial evidence “Aurian is a leading provider of information security services in Australia.” Source: RevenueBase Database · checked Aug 31, 2026
23	Cybernod	Indirect evidence	Sydney, Australia	1-10	2 contacts →
	Indirect evidence “We bring together everything that is required to inform and help you secure your presence on the internet and give you a view of how exposed your business is to cyber attacks.” Source: RevenueBase Database · checked Aug 31, 2026
24	Xigsaw	Partial evidence	Sydney, Australia	1-10	2 contacts →
	Partial evidence “XIGSAW IS SOLVING THE IT SECURITY PUZZLE Businesses buy on advise and desire the best outcome.” Source: RevenueBase Database · checked Aug 31, 2026
25	Aykira Internet Solutions	Indirect evidence	Sydney, Australia	1-10	2 contacts →
	Indirect evidence “We provide technical consultancy services for businesses.” Source: RevenueBase Database · checked Aug 31, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: application security consulting firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names application security consulting firms.
Partial evidence: Its own public description names part of application security consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name application security consulting firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 59 application security consulting firms based in Sydney, Australia

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Application security consulting firms based in Sydney, Australia at a glance

As of Aug 31, 2026

40.8%Verified-email coverage

4.2%Mobile-number coverage

5.2Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · Sydney

Aug 31, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among application security consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Sydney, Australia whose own description of what they do matches “application security consulting firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names application security consulting firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among application security consulting firms, and records with no verified work email. Companies headquartered outside Sydney are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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: Every listed company carries at least one verified work email, 125 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on August 31, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Application security consulting firms by metro in Australia

Application security consulting firms in Sydney59
Application security consulting firms in Melbourne52

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names application security consulting firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many application security consulting firms are there based in Sydney, Australia?

RevenueBase identified 59 application security consulting firms headquartered in Sydney, Australia as of August 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

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

Which city has the most application security consulting firms?

Sydney leads with 59 headquartered companies, followed by Melbourne (52) and Canberra (18).

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 125 verified decision-maker contacts tracked across these 59 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on August 31, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 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 with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.