Company lists · Data refreshed September 2026

Top 24 Security consultancy firms based in Sydney, Australia

Name: Security consultancy firms based in Sydney, Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 84 companies tracked

RevenueBase identified 84 security consultancy firms headquartered in Sydney, Australia as of September 2026 and tracks 486 professional contacts across them, including 171 with verified work emails. Melbourne is the largest hub.

This list covers security consultancy 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 September 21, 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 21, 2026 86% judged on-target in blind review

84Companies

486Contacts tracked

171Verified emails

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The 24 largest security consultancy firms based in Sydney, Australia

Ranked by team size

Top 24 of 84 security consultancy firms based in Sydney, Australia, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to security consultancy 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	Seccom Global	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	41 contacts →
	Partial evidence “Seccom Global - The Cyber Security Company Providing excellence in service to educate, connect and protect your business Founded in 2003, Seccom Global is recognised as a leader…” Source: RevenueBase Database · checked Sep 21, 2026
2	Gridware	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	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 Sep 21, 2026
3	Group 1 Security	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	201-500	25 contacts →
	Indirect evidence “FreeCall 1800 GROUP 1.” Source: RevenueBase Database · checked Sep 21, 2026
4	Silentgrid Security	Strong evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	23 contacts →
	Strong evidence “SilentGrid is an offensive security consultancy with a focus on adversary simulation and penetration testing.” Source: RevenueBase Database · checked Sep 21, 2026
5	Lote Consulting Fire Security Cyber Risk	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	20 contacts →
	Partial evidence “Headquartered in Australia, Lote Consulting is a specialist engineering consultancy committed to delivering innovative, integrated, and performance-driven solutions in Fire…” Source: RevenueBase Database · checked Sep 21, 2026
6	Razilio	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	1-10	19 contacts →
	Partial evidence “Razilio is a Sydney, Australia-based boutique cybersecurity consultancy that simplifies the management of cyber risk for businesses of all sizes.” Source: RevenueBase Database · checked Sep 21, 2026
7	Ciso Online	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	17 contacts →
	Partial evidence “CISO Online™ specialises in Cyber Security, Governance, Risk & Compliance (GRC), and Secure AI adoption for government agencies, large enterprises, and SMBs across Australia and…” Source: RevenueBase Database · checked Sep 21, 2026
8	Mercury Information Security Services	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 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 21, 2026
9	Morrisec	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 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 21, 2026
10	Parabellum	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 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 21, 2026
11	Volkis	Strong evidence	Sydney, AustraliaHQ checked Sep 21, 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 21, 2026
12	Asontu	Strong evidence	Sydney, AustraliaHQ checked Sep 21, 2026	1-10	8 contacts →
	Strong evidence “We want to be the next generation of cyber security consultancy firms.” Source: RevenueBase Database · checked Sep 21, 2026
13	Cliffside Cybersecurity	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	8 contacts →
	Partial 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 21, 2026
14	AMR Security	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	8 contacts →
	Partial evidence “AMR Security installs and services electronic security systems.” Source: RevenueBase Database · checked Sep 21, 2026
15	Cyberpulse	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 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 21, 2026
16	RED Cursor	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	1-10	6 contacts →
	Indirect evidence “Red Cursor was built on more than 20 years of real-world cybersecurity experience, helping protect over 800 organisations across Australia and beyond.” Source: RevenueBase Database · checked Sep 21, 2026
17	Project Black	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	1-10	6 contacts →
	Partial evidence “Project Black is a CREST accredited Australian cybersecurity consultancy providing exceptional, transparent, and value-driven solutions.” Source: RevenueBase Database · checked Sep 21, 2026
18	Cyberlinx	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 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 21, 2026
19	Vertex Cyber Security	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	6 contacts →
	Partial evidence “Vertex Cyber Security provides an extensive Cyber Security capability of Technology and Security Services for organisations across Sydney.” Source: RevenueBase Database · checked Sep 21, 2026
20	Nsaa Security	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 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 21, 2026
21	Centropy Services & Solutions	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 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 21, 2026
22	Patterned Security	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 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 21, 2026
23	Renaissance IT	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	4 contacts →
	Partial evidence “At Renaissance IT, we provide cyber security consulting and training.” Source: RevenueBase Database · checked Sep 21, 2026
24	Daris Group	Strong evidence	Sydney, AustraliaHQ checked Sep 21, 2026	1-10	3 contacts →
	Strong evidence “A boutique consultancy to specialise in investigation, risk, governance, security planning and related strategy development and implementation.” Source: RevenueBase Database · checked Sep 21, 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: security consultancy 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 security consultancy firms.
Partial evidence: Its own public description names part of security consultancy firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name security consultancy 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 24 of 84 security consultancy firms based in Sydney, Australia

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Security consultancy firms based in Sydney, Australia at a glance

As of Sep 21, 2026

35.2%Verified-email coverage

5.8Average contacts per company

1-10Median size (employees)

109.5%Largest-city concentration · Melbourne

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

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 84 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 security consultancy 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 “security consultancy 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 security consultancy 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 security consultancy 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, 171 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 21, 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.

Security consultancy firms by metro in Australia

Security consultancy firms in Melbourne92
Security consultancy firms in Sydney84
Security consultancy firms in Brisbane37
Security consultancy firms in Canberra35

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 security consultancy 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 security consultancy firms are there based in Sydney, Australia?

RevenueBase identified 84 security consultancy firms 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?

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

Which city has the most security consultancy firms?

Melbourne leads with 92 headquartered companies, followed by Sydney (84) and Brisbane (37).

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 171 verified decision-maker contacts tracked across these 84 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 21, 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.