Company lists · Data refreshed September 2026

Top 25 Enterprise security assessment services based in Sydney, Australia

Name: Enterprise security assessment services based in Sydney, Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 62 companies tracked

RevenueBase identified 62 enterprise security assessment services headquartered in Sydney, Australia as of September 2026 and tracks 284 professional contacts across them, including 111 with verified work emails. Across Australia, Sydney is the largest hub for this category.

This list covers enterprise security assessment services 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 September 28, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

62Companies

284Contacts tracked

111Verified emails

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The 25 largest enterprise security assessment services based in Sydney, Australia

Ranked by team size

Top 25 of 62 enterprise security assessment services based in Sydney, Australia, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to enterprise security assessment services: 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	CSO Group	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	11-50	31 contacts →
	Partial evidence “CSO Group provides ICT security services and solutions to protect Australian businesses from advanced cyber threats.” Source: RevenueBase Database · checked Sep 28, 2026
2	Silentgrid Security	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	11-50	23 contacts →
	Partial evidence “SilentGrid is an offensive security consultancy with a focus on adversary simulation and penetration testing.” Source: RevenueBase Database · checked Sep 28, 2026
3	Threat Intelligence	Indirect evidence	Sydney, AustraliaHQ checked Sep 28, 2026	11-50	19 contacts →
	Indirect evidence “Threat Intelligence is different.” Source: RevenueBase Database · checked Sep 28, 2026
4	Mercury Information Security Services	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	14 contacts →
	Partial evidence “Our mission is to provide organisations with a comprehensive, world class range of customised information security services and advice which will enable them to secure and protect…” Source: RevenueBase Database · checked Sep 28, 2026
5	Morrisec	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	11-50	14 contacts →
	Partial evidence “Morrisec provides tailored security strategies and services that align with each company’s specific threat landscape, risk profile, and strategic goals.” Source: RevenueBase Database · checked Sep 28, 2026
6	Parabellum	Indirect evidence	Sydney, AustraliaHQ checked Sep 28, 2026	11-50	13 contacts →
	Indirect evidence “At Parabellum, we help organisations see clearly and act confidently in a complex digital world.” Source: RevenueBase Database · checked Sep 28, 2026
7	Galah Cyber	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	11-50	12 contacts →
	Partial 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 Sep 28, 2026
8	Volkis	Strong evidence	Sydney, AustraliaHQ checked Sep 28, 2026	11-50	10 contacts →
	Strong 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 Sep 28, 2026
9	Cliffside Cybersecurity	Indirect evidence	Sydney, AustraliaHQ checked Sep 28, 2026	11-50	8 contacts →
	Indirect evidence “At Cliffside, we believe the cybersecurity industry has a truth problem: vendors oversell, consultants overcomplicate, and products are pushed over real solutions.” Source: RevenueBase Database · checked Sep 28, 2026
10	Iqbox PTY LTD	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	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 Sep 28, 2026
11	Cyberpulse	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	11-50	6 contacts →
	Partial evidence “CyberPulse partners with organisations to operationalise security across the full threat lifecycle, from governance and compliance through to detection, response, and continuous…” Source: RevenueBase Database · checked Sep 28, 2026
12	Cyberlinx	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	6 contacts →
	Partial evidence “Cyberlinx is a premier cyber security solutions and services provider, we offer a comprehensive range of cyber security solutions, including, infrastructure and network security…” Source: RevenueBase Database · checked Sep 28, 2026
13	Fort1 PTY LTD	Indirect evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	5 contacts →
	Indirect evidence “Fort1: Comprehensive Cybersecurity Services based in Australia.” Source: RevenueBase Database · checked Sep 28, 2026
14	Nsaa Security	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	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 Sep 28, 2026
15	Centropy Services & Solutions	Indirect evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	4 contacts →
	Indirect evidence “The term Centropy is a scientific reference to the reversal of chaos or entropy.” Source: RevenueBase Database · checked Sep 28, 2026
16	DITNO	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	11-50	4 contacts →
	Partial evidence “Ditno helps organisations understand and reduce their Threat Exposure by focusing on the security risks that actually matter.” Source: RevenueBase Database · checked Sep 28, 2026
17	Patterned Security	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	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 Sep 28, 2026
18	Assuredly	Indirect evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	3 contacts →
	Indirect evidence “Assuredly is on a mission to achieve information cybersecurity assurance in a reliable, repeatable, and simplified process that helps to give organisations cyber resilience.” Source: RevenueBase Database · checked Sep 28, 2026
19	Undark Solutions Undark.io	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	2 contacts →
	Partial evidence “Undark Solutions, a boutique cybersecurity consultancy founded in 2009, empowers enterprises with robust offensive & defensive solutions, including preventative strategies &…” Source: RevenueBase Database · checked Sep 28, 2026
20	Sectara	Strong evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	2 contacts →
	Strong 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 Sep 28, 2026
21	Grc4	Indirect evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence “GRC4 specialises in a range of services designed to fortify your business and streamline your operations.” Source: RevenueBase Database · checked Sep 28, 2026
22	Aurian Security	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	2 contacts →
	Partial evidence “Aurian is a leading provider of information security services in Australia.” Source: RevenueBase Database · checked Sep 28, 2026
23	Xigsaw	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	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 Sep 28, 2026
24	Cybernod	Indirect evidence	Sydney, AustraliaHQ checked Sep 28, 2026	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 Sep 28, 2026
25	Core Sentinel	Indirect evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence “Core Sentinel: Australia’s Premier Penetration Testing & Cybersecurity Experts.” Source: RevenueBase Database · checked Sep 28, 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: enterprise security assessment services. 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 enterprise security assessment services.
Partial evidence: Its own public description names part of enterprise security assessment services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name enterprise security assessment services. 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 62 enterprise security assessment services based in Sydney, Australia

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Enterprise security assessment services based in Sydney, Australia at a glance

As of Sep 28, 2026

39.1%Verified-email coverage

4.6Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

Email recency for this list is measured across the whole Australia list rather than for Sydney, so it is reported there. Company counts and contact totals on this page are exact for Sydney, over 62 companies.

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 enterprise security assessment services, 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 “enterprise security assessment services”. 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 enterprise security assessment services), 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 enterprise security assessment services, 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, 111 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 September 28, 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.

Enterprise security assessment services by metro in Australia

Enterprise security assessment services in Melbourne61

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 enterprise security assessment services, 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 enterprise security assessment services are there based in Sydney, Australia?

RevenueBase identified 62 enterprise security assessment services headquartered in Sydney, Australia as of September 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?

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

Which city in Australia has the most enterprise security assessment services?

Sydney leads Australia with 62 headquartered companies, followed by Melbourne (61) and Canberra (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 111 verified decision-maker contacts tracked across these 62 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 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.