Company lists · Data refreshed September 2026

Top 25 Infrastructure security assessment companies based in Australia

Name: Infrastructure security assessment companies based in Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 172 companies tracked

RevenueBase identified 172 infrastructure security assessment companies headquartered in Australia as of September 2026 and tracks 1,370 professional contacts across them, including 489 with verified work emails. Sydney is the largest hub.

This list covers infrastructure security assessment companies headquartered in 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

172Companies

1,370Contacts tracked

489Verified emails

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The 25 largest infrastructure security assessment companies based in Australia

Ranked by team size

Top 25 of 172 infrastructure security assessment companies based in Australia, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to infrastructure security assessment companies: 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	Triskele Labs	Indirect evidence	Melbourne, AustraliaHQ checked Sep 28, 2026	51-200	123 contacts →
	Indirect evidence “Triskele Labs is one of Australia’s fastest growing cybersecurity companies.” Source: RevenueBase Database · checked Sep 28, 2026
2	Ipsec PTY LTD	Partial evidence	Cremorne, AustraliaHQ checked Sep 28, 2026	11-50	57 contacts →
	Partial evidence “IPSec are specialists in information asset and cyber protection; security experts who know how to mitigate cyber risk by assisting in the protection of valuable intelligence…” Source: RevenueBase Database · checked Sep 28, 2026
3	Vectra	Partial evidence	Adelaide, AustraliaHQ checked Sep 28, 2026	51-200	42 contacts →
	Partial evidence “Vectra, an Ensign company, is Australia’s trusted partner for security consulting, risk management, compliance, and managed services.” Source: RevenueBase Database · checked Sep 28, 2026
4	Opusv Tech Group	Partial evidence	Oakleigh, AustraliaHQ checked Sep 28, 2026	11-50	28 contacts →
	Partial evidence “OpusV has been operating in the infrastructure design and support space for over 20 years.” Source: RevenueBase Database · checked Sep 28, 2026
5	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
6	Surecity Networks	Indirect evidence	South Melbourne, AustraliaHQ checked Sep 28, 2026	11-50	20 contacts →
	Indirect evidence “SureCity Networks is an Australian Cybersecurity firm with offices in Melbourne, Sydney, Brisbane and the UK, trusted by enterprises globally.” Source: RevenueBase Database · checked Sep 28, 2026
7	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
8	Cybersecon	Partial evidence	Melbourne, AustraliaHQ checked Sep 28, 2026	11-50	18 contacts →
	Partial evidence “CyberSecOn is an Information security company with a presence in Australia, USA and India.” Source: RevenueBase Database · checked Sep 28, 2026
9	Retrospect Labs	Partial evidence	Perth, AustraliaHQ checked Sep 28, 2026	11-50	17 contacts →
	Partial evidence “Retrospect Labs is a specialist information security company focused on helping companies improve their security posture and resilience through realistic exercises.” Source: RevenueBase Database · checked Sep 28, 2026
10	Zynet PTY LTD	Partial evidence	Tullamarine, AustraliaHQ checked Sep 28, 2026	11-50	17 contacts →
	Partial evidence “Zynet is an Australian cyber security and IT services provider with more than 25 years of experience protecting organisations and keeping critical systems running.” Source: RevenueBase Database · checked Sep 28, 2026
11	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
12	Sentaris	Partial evidence	Melbourne, AustraliaHQ checked Sep 28, 2026	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 Sep 28, 2026
13	Spartans Security	Indirect evidence	Cremorne, AustraliaHQ checked Sep 28, 2026	11-50	14 contacts →
	Indirect evidence “Facing the Complexities of Cybersecurity?” Source: RevenueBase Database · checked Sep 28, 2026
14	Elttam	Indirect evidence	Melbourne, AustraliaHQ checked Sep 28, 2026	11-50	12 contacts →
	Indirect evidence “Expert-led penetration testing, supported by AI-assisted analysis, to uncover real weaknesses and strengthen systems against real-world threats.” Source: RevenueBase Database · checked Sep 28, 2026
15	Cyberrisk	Partial evidence	Melbourne, AustraliaHQ checked Sep 28, 2026	11-50	11 contacts →
	Partial evidence “Information security and technology risk management consulting - at CyberRisk we design, implement and operate information security programs to allow you to reduce and manage your…” Source: RevenueBase Database · checked Sep 28, 2026
16	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
17	Cyber Audit Team	Partial evidence	South East Queensland, AustraliaHQ checked Sep 28, 2026	11-50	9 contacts →
	Partial evidence “Cyber Audit Team is a leading multi-disciplinary Australian cyber security company offering holistic 'end-to-end' solutions, ensuring that our clients' businesses are operating in…” Source: RevenueBase Database · checked Sep 28, 2026
18	Cybra Security	Partial evidence	Melbourne, AustraliaHQ checked Sep 28, 2026	1-10	9 contacts →
	Partial evidence “Our mission is simple, make cyber security accessible to all Australian businesses.” Source: RevenueBase Database · checked Sep 28, 2026
19	Haksec Group	Indirect evidence	Sunshine Coast, AustraliaHQ checked Sep 28, 2026	1-10	8 contacts →
	Indirect evidence “Haksec is a small cybersecurity firm based in Queensland, Australia founded by Luke Stephens (hakluke).” Source: RevenueBase Database · checked Sep 28, 2026
20	Argos Cloud Security	Strong evidence	Geelong, AustraliaHQ checked Sep 28, 2026	1-10	8 contacts →
	Strong evidence “ARGOS Cloud Security helps MSPs, MSSPs and consulting teams deliver deeper cloud security assessments with less manual work.” Source: RevenueBase Database · checked Sep 28, 2026
21	Dotsec	Partial evidence	Brisbane, AustraliaHQ checked Sep 28, 2026	11-50	7 contacts →
	Partial evidence “dotSec is a professional cyber security organisation that was founded in on a single premise: A business that treats security as a strategic asset should be able to operate with…” Source: RevenueBase Database · checked Sep 28, 2026
22	Crysp Consulting	Indirect evidence	Southbank, AustraliaHQ checked Sep 28, 2026	11-50	7 contacts →
	Indirect evidence “Crysp Consulting (Crysp) was founded by two professionals with collective experience of more than 35 years in the industry.” Source: RevenueBase Database · checked Sep 28, 2026
23	Shea Security	Partial evidence	Melbourne, AustraliaHQ checked Sep 28, 2026	1-10	7 contacts →
	Partial evidence “Operating from Melbourne, Australia, we offer security testing and training for Australia and specialised remote testing for countries including Ireland, the United Kingdom, the…” Source: RevenueBase Database · checked Sep 28, 2026
24	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
25	The Pearson Corporation PTY LTD A Tesserent Company	Partial evidence	Canberra, AustraliaHQ checked Sep 28, 2026	51-200	6 contacts →
	Partial evidence “The Pearson Corporation is a locally owned Canberra IT Consulting firm that has proven experience and a track record for delivering ICT and Cyber Security services to both the…” 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: infrastructure security assessment companies. 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 infrastructure security assessment companies.
Partial evidence: Its own public description names part of infrastructure security assessment companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name infrastructure security assessment companies. 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 172 infrastructure security assessment companies based in Australia

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Infrastructure security assessment companies based in Australia at a glance

As of Sep 28, 2026

35.7%Verified-email coverage

8.0Average contacts per company

1-10Median size (employees)

23.3%Largest-city concentration · Sydney

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

109

11-50

51-200

201-500

Email recency for this list is measured worldwide rather than for Australia, so it is reported there. Company counts and contact totals on this page are exact for Australia, over 172 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 infrastructure security assessment companies, 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 Australia whose own description of what they do matches “infrastructure security assessment companies”. 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 infrastructure security assessment companies), 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 infrastructure security assessment companies, and records with no verified work email. Companies headquartered outside Australia 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, 489 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.

Infrastructure security assessment companies by metro

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 infrastructure security assessment companies, 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 infrastructure security assessment companies are there based in Australia?

RevenueBase identified 172 infrastructure security assessment companies headquartered in 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?

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

Which city has the most infrastructure security assessment companies?

Sydney leads with 40 headquartered companies, followed by Melbourne (38) 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 489 verified decision-maker contacts tracked across these 172 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.