Company lists · Data refreshed September 2026

Top 25 Managed security services companies based in Sydney, Australia

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

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 77 companies tracked

RevenueBase identified 77 managed security services companies headquartered in Sydney, Australia as of September 2026 and tracks 821 professional contacts across them, including 398 with verified work emails. Melbourne is the largest hub.

This list covers managed security services companies 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 5, 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 HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

77Companies

821Contacts tracked

398Verified emails

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The 25 largest managed security services companies based in Sydney, Australia

Ranked by team size

Top 25 of 77 managed security services companies based in Sydney, Australia, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names managed security services companies: 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	InfotrustStrong evidence	Sydney, AustraliaHQ checked Sep 5, 2026	201-500	122
	“Infotrust (ITS) is Australia’s leading cyber security and managed technology services provider listed on the ASX.” Source: company website · checked Sep 5, 2026
2	Secure AgilityPartial evidence	Sydney, AustraliaHQ checked Sep 5, 2026	51-200	87
	“Secure Agility is a Australian-based technology partner specialising in secure managed IT services for NSW government, enterprise and mid-market organisations.” Source: company website · checked Sep 5, 2026
3	Northbridge SystemsStrong evidence	Sydney, AustraliaHQ checked Sep 5, 2026	51-200	70
	“Northbridge is an Australian-owned cybersecurity services provider with more than 25 years’ experience delivering engineered, integrated and fully managed security services to…” Source: company website · checked Sep 5, 2026
4	Seccom GlobalPartial evidence	Sydney, AustraliaHQ checked Sep 5, 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 5, 2026
5	FifteenStrong evidence	Sydney, AustraliaHQ checked Sep 5, 2026	51-200	36
	“Delivering the next generation of managed cyber security, together.” Source: company website · checked Sep 5, 2026
6	NSB CyberPartial evidence	Sydney, AustraliaHQ checked Sep 5, 2026	11-50	33
	“NSB Cyber is an Australian-founded, privately owned cyber security company based in Sydney.” Source: company website · checked Sep 5, 2026
7	CSO GroupPartial evidence	Sydney, AustraliaHQ checked Sep 5, 2026	11-50	31
	“CSO Group provides ICT security services and solutions to protect Australian businesses from advanced cyber threats.” Source: company website · checked Sep 5, 2026
8	NUEVAIndirect evidence	Sydney, AustraliaHQ checked Sep 5, 2026	51-200	30
	“At Nueva, we aim to create a safer digital environment by providing innovative and customised cybersecurity solutions for our clients.” Source: company website · checked Sep 5, 2026
9	Datcom CloudIndirect evidence	Sydney, AustraliaHQ checked Sep 5, 2026	11-50	26
	“Minimise the risk of a cybersecurity incident.” Source: company website · checked Sep 5, 2026
10	ThreatdefencePartial evidence	Sydney, AustraliaHQ checked Sep 5, 2026	11-50	24
	“ThreatDefence provides innovative Security Operations and cyber defence solutions to MSPs and Enterprises.” Source: company website · checked Sep 5, 2026
11	Threat IntelligenceIndirect evidence	Sydney, AustraliaHQ checked Sep 5, 2026	11-50	19
	“Threat Intelligence is different.” Source: company website · checked Sep 5, 2026
12	NCC Group ApacIndirect evidence	Sydney, AustraliaHQ checked Sep 5, 2026	1,001-5,000	18
	“NCC Group exists to make the world safer and more secure.” Source: company website · checked Sep 5, 2026
13	Intrix Cyber SecurityPartial evidence	Sydney, AustraliaHQ checked Sep 5, 2026	11-50	16
	“Intrix Cyber Security protect businesses with our Information Security Services.” Source: company website · checked Sep 5, 2026
14	Skylight Cyber SecurityPartial evidence	Sydney, AustraliaHQ checked Sep 5, 2026	11-50	15
	“Skylight is a boutique cyber security practice providing high-end services to the modern enterprise.” Source: company website · checked Sep 5, 2026
15	Nova Security GroupIndirect evidence	Sydney, AustraliaHQ checked Sep 5, 2026	201-500	15
	Source: company website · checked Sep 5, 2026
16	ProsysStrong evidence	Sydney, AustraliaHQ checked Sep 5, 2026	51-200	15
	“Prosys Services is an Australian owned company specialised in enterprise-grade security management systems.” Source: company website · checked Sep 5, 2026
17	MorrisecPartial evidence	Sydney, AustraliaHQ checked Sep 5, 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 5, 2026
18	Urban Protection GroupPartial evidence	Sydney, AustraliaHQ checked Sep 5, 2026	51-200	13
	“Urban Protection Group is a trusted partner in delivering comprehensive security solutions.” Source: company website · checked Sep 5, 2026
19	ZirilioIndirect evidence	Sydney, AustraliaHQ checked Sep 5, 2026	11-50	10
	“With ZIRILIO on your side, the digital world just became safer.” Source: company website · checked Sep 5, 2026
20	Cyberhub GroupPartial evidence	Sydney, AustraliaHQ checked Sep 5, 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 5, 2026
21	Iqbox PTY LTDPartial evidence	Sydney, AustraliaHQ checked Sep 5, 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 5, 2026
22	CyberpulsePartial evidence	Sydney, AustraliaHQ checked Sep 5, 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 5, 2026
23	CyberaiIndirect evidence	Sydney, AustraliaHQ checked Sep 5, 2026	11-50	6
	“CyberAi is a cybersecurity and Ai partner, purpose‑built to help organisations reduce risk, simplify complexity, and move faster without carrying the cost and drag of traditional…” Source: company website · checked Sep 5, 2026
24	CyberlinxPartial evidence	Sydney, AustraliaHQ checked Sep 5, 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 5, 2026
25	Fort1 PTY LTDIndirect evidence	Sydney, AustraliaHQ checked Sep 5, 2026	1-10	5
	“Fort1: Comprehensive Cybersecurity Services based in Australia.” Source: company website · checked Sep 5, 2026

Showing 25 of 77 managed security services companies based in Sydney, Australia

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Managed security services companies based in Sydney, Australia at a glance

As of Sep 5, 2026

11-50Median size (employees)

MelbourneLargest hub · 78 HQs

Contacts with mobile numbers

Sep 5, 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 77 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 managed security services companies, 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 “managed security services companies”. 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 managed security services companies, 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, 398 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 5, 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.

Managed security services companies by metro in Australia

Managed security services companies in Melbourne78
Managed security services companies in Sydney77
Managed security services companies in Brisbane26
Managed security services companies in Perth25

Frequently asked

How many managed security services companies are there based in Sydney, Australia?

RevenueBase identified 77 managed security services companies 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?

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

Which city has the most managed security services companies?

Melbourne leads with 78 headquartered companies, followed by Sydney (77) and Brisbane (26).

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 398 verified decision-maker contacts tracked across these 77 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 5, 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.