Company lists · Data refreshed September 2026

Top 22 Intelligence and security services based in Sydney, Australia

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

Compiled by the RevenueBase Data Team Data refreshed Sep 4, 2026 114 companies tracked

RevenueBase identified 114 intelligence and security services headquartered in Sydney, Australia as of September 2026 and tracks 854 professional contacts across them, including 336 with verified work emails. Sydney is the largest hub.

This list covers intelligence and security 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, how directly it supports the match, and when it was last checked. Data refreshed September 4, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 Match evidence on every row Refreshed Sep 4, 2026 86% judged on-target in blind review

114Companies

854Contacts tracked

336Verified emails

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The 22 largest intelligence and security services based in Sydney, Australia

Ranked by team size

Top 22 of 114 intelligence and security services based in Sydney, Australia, ranked by team size, largest first. Data refreshed Sep 4, 2026. Evidence rates how directly each company's own description names intelligence and security services: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	Seccom GlobalPartial evidence	Sydney, AustraliaHQ checked Sep 4, 2026	11-50	41
	“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: company website · checked Sep 4, 2026
2	CSO GroupPartial evidence	Sydney, AustraliaHQ checked Sep 4, 2026	11-50	29
	“CSO Group provides ICT security services and solutions to protect Australian businesses from advanced cyber threats.” Source: company website · checked Sep 4, 2026
3	FortianPartial evidence	Sydney, Australia	11-50	26
	“Fortian is a leading Australian company specialising in cyber security, privacy, and technology risk management.” Source: company website · checked Sep 4, 2026
4	GridwareIndirect evidence	Sydney, AustraliaHQ checked Sep 4, 2026	11-50	25
	“For most organisations in Australia, a data breach can be more than a PR disaster, it could be the final chapter.” Source: company website · checked Sep 4, 2026
5	Group 1 SecurityIndirect evidence	Sydney, AustraliaHQ checked Sep 4, 2026	201-500	25
	“FreeCall 1800 GROUP 1.” Source: company website · checked Sep 4, 2026
6	Silentgrid SecurityPartial evidence	Sydney, AustraliaHQ checked Sep 4, 2026	11-50	22
	“SilentGrid is an offensive security consultancy with a focus on adversary simulation and penetration testing.” Source: company website · checked Sep 4, 2026
7	RazilioIndirect evidence	Sydney, AustraliaHQ checked Sep 4, 2026	1-10	19
	“Razilio is a Sydney, Australia-based boutique cybersecurity consultancy that simplifies the management of cyber risk for businesses of all sizes.” Source: company website · checked Sep 4, 2026
8	Threat IntelligencePartial evidence	Sydney, AustraliaHQ checked Sep 4, 2026	11-50	19
	“Threat Intelligence is different.” Source: company website · checked Sep 4, 2026
9	NCC Group ApacIndirect evidence	Sydney, AustraliaHQ checked Sep 4, 2026	1,001-5,000	18
	“NCC Group exists to make the world safer and more secure.” Source: company website · checked Sep 4, 2026
10	SecuroakIndirect evidence	Sydney, AustraliaHQ checked Sep 4, 2026	11-50	18
	“Securoak is a Cybersecurity consulting firm with a primary focus in solving digital identity problems by providing industry rewarding solutions.” Source: company website · checked Sep 4, 2026
11	Intrix Cyber SecurityPartial evidence	Sydney, AustraliaHQ checked Sep 4, 2026	11-50	16
	“Intrix Cyber Security protect businesses with our Information Security Services.” Source: company website · checked Sep 4, 2026
12	Skylight Cyber SecurityPartial evidence	Sydney, AustraliaHQ checked Sep 4, 2026	11-50	15
	“Skylight is a boutique cyber security practice providing high-end services to the modern enterprise.” Source: company website · checked Sep 4, 2026
13	MorrisecPartial evidence	Sydney, AustraliaHQ checked Sep 4, 2026	11-50	14
	“Morrisec provides tailored security strategies and services that align with each company’s specific threat landscape, risk profile, and strategic goals.” Source: company website · checked Sep 4, 2026
14	IFW GlobalPartial evidence	Sydney, AustraliaHQ checked Sep 4, 2026	11-50	14
	“IFW Global is an international private intelligence firm, specialising in cybercrime investigations, asset recovery and financial crime intelligence.” Source: company website · checked Sep 4, 2026
15	Cyberhub GroupPartial evidence	Sydney, AustraliaHQ checked Sep 4, 2026	11-50	9
	“CyberHub was established with the aim of making Cyber Security more available to companies of all sizes.” Source: company website · checked Sep 4, 2026
16	AsontuPartial evidence	Sydney, AustraliaHQ checked Sep 4, 2026	1-10	8
	“We want to be the next generation of cyber security consultancy firms.” Source: company website · checked Sep 4, 2026
17	DVULNIndirect evidence	Sydney, AustraliaHQ checked Sep 4, 2026	1-10	7
	“Founded in 2016, Dvuln is a globally CREST-certified cybersecurity firm specialising in advanced penetration testing, adversary simulation, attacker-led threat hunting, and…” Source: company website · checked Sep 4, 2026
18	Iqbox PTY LTDPartial evidence	Sydney, AustraliaHQ checked Sep 4, 2026	11-50	7
	“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: company website · checked Sep 4, 2026
19	CyberpulsePartial evidence	Sydney, AustraliaHQ checked Sep 4, 2026	11-50	6
	“CyberPulse partners with organisations to operationalise security across the full threat lifecycle, from governance and compliance through to detection, response, and continuous…” Source: company website · checked Sep 4, 2026
20	D2unet PTY LTDIndirect evidence	Sydney, AustraliaHQ checked Sep 4, 2026	1-10	6
	“At D2UNet, we take a multi-faceted approach to cybersecurity.” Source: company website · checked Sep 4, 2026
21	CyberlinxPartial evidence	Sydney, AustraliaHQ checked Sep 4, 2026	1-10	6
	“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: company website · checked Sep 4, 2026
22	RST CloudPartial evidence	Sydney, AustraliaHQ checked Sep 4, 2026	1-10	5
	“RST Cloud provides Threat Intelligence solutions that help cybersecurity experts in their everyday life.” Source: company website · checked Sep 4, 2026

Showing 22 of 114 intelligence and security services based in Sydney, Australia

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Intelligence and security services based in Sydney, Australia at a glance

As of Sep 4, 2026

1-10Median size (employees)

SydneyLargest hub · 114 HQs

Contacts with mobile numbers

Sep 4, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Email recency for this list is measured across the whole Australia list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for Sydney, over 114 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 intelligence and security services, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “intelligence and security services”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among intelligence and security 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 an evidence 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, 336 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 4, 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.

Intelligence and security services by metro in Australia

Intelligence and security services in Sydney114
Intelligence and security services in Melbourne106
Intelligence and security services in Canberra55
Intelligence and security services in Brisbane42
Intelligence and security services in Perth28
Intelligence and security services in Adelaide25

Frequently asked

How many intelligence and security services are there based in Sydney, Australia?

RevenueBase identified 114 intelligence and security 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?

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

Which city has the most intelligence and security services?

Sydney leads with 114 headquartered companies, followed by Melbourne (106) and Canberra (55).

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 336 verified decision-maker contacts tracked across these 114 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 4, 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 SmartSearch, 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.