Company lists · Data refreshed September 2026

Top 25 List security companies based in Sydney, Australia

Name: List security companies 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 88 companies tracked

RevenueBase identified 88 list security companies headquartered in Sydney, Australia as of September 2026 and tracks 652 professional contacts across them, including 95 with verified work emails. Sydney is the largest hub.

This list covers list security 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, 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

88Companies

652Contacts tracked

95Verified emails

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The 25 largest list security companies based in Sydney, Australia

Ranked by team size

Top 25 of 88 list security companies 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 list security 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	Commander Security Services	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	n/a	66 contacts →
	Partial evidence “Commander Security Services is an Australian owned and operated company that has been created, and its foundations built on over 25 years’ experience in the security industry.” Source: RevenueBase Database · checked Sep 21, 2026
2	Guardian Venue Management International	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	201-500	53 contacts →
	Partial evidence “Guardian Venue Management International is a proudly Australian-owned company, dedicated to delivering the highest standards of Security Solutions, Customized Protection, Traffic…” Source: RevenueBase Database · checked Sep 21, 2026
3	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
4	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
5	Empire Technologies	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	21 contacts →
	Indirect evidence “At Empire Technologies, our unwavering dedication to delivering technology solutions can help you drive business success.” Source: RevenueBase Database · checked Sep 21, 2026
6	Prosys	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	51-200	15 contacts →
	Partial evidence “Prosys Services is an Australian owned company specialised in enterprise-grade security management systems.” Source: RevenueBase Database · checked Sep 21, 2026
7	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
8	Urban Protection Group	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	51-200	13 contacts →
	Partial evidence “Urban Protection Group is a trusted partner in delivering comprehensive security solutions.” Source: RevenueBase Database · checked Sep 21, 2026
9	Zirilio	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	10 contacts →
	Indirect evidence “With ZIRILIO on your side, the digital world just became safer.” Source: RevenueBase Database · checked Sep 21, 2026
10	Cyberhub Group	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	9 contacts →
	Partial evidence “CyberHub was established with the aim of making Cyber Security more available to companies of all sizes.” Source: RevenueBase Database · checked Sep 21, 2026
11	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
12	Iqbox PTY LTD	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 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 21, 2026
13	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
14	Abacus Security Services PTY LTD	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	51-200	6 contacts →
	Partial evidence “Abacus is a leading provider of security officers around Australia and has over a decade's experience in specialised government, infrastructure and corporate security.” Source: RevenueBase Database · checked Sep 21, 2026
15	Fort1 PTY LTD	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	1-10	5 contacts →
	Indirect evidence “Fort1: Comprehensive Cybersecurity Services based in Australia.” Source: RevenueBase Database · checked Sep 21, 2026
16	D2unet PTY LTD	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	1-10	5 contacts →
	Indirect evidence “At D2UNet, we take a multi-faceted approach to cybersecurity.” Source: RevenueBase Database · checked Sep 21, 2026
17	Mtss Group	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	1-10	4 contacts →
	Partial evidence “Specialists in Security & IT Services.” Source: RevenueBase Database · checked Sep 21, 2026
18	Pinnacle Protection	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	3 contacts →
	Partial evidence “Pinnacle Protection have been providing professional security and training services in Sydney, Illawarra, Wollongong, the Northern Beaches and the Newcastle region for over 20…” Source: RevenueBase Database · checked Sep 21, 2026
19	Sense Of Security	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	3 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
20	Alpha Security Corp	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	1-10	3 contacts →
	Partial evidence “Alpha Security Corp -"Peace Of Mind Is Our Priority" Specialising in complete Security and smart wiring system solutions M/L:” Source: RevenueBase Database · checked Sep 21, 2026
21	Jayde Consulting PTY LTD Threat Advisory	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	1-10	2 contacts →
	Indirect evidence “Jayde Consulting provides professional and discreet services to protect sensitive, confidential and commercially valuable information from electronic eavesdropping, surveillance…” Source: RevenueBase Database · checked Sep 21, 2026
22	Grc4	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 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 21, 2026
23	Secure MAX Security	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	2 contacts →
	Partial evidence “Secure Max Security is an Electronic Security provider, Providing Commercial & Domestic clients with exceptional Service, Installations, Preventative maintenance and Alarm…” Source: RevenueBase Database · checked Sep 21, 2026
24	Collab Tech Systems	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	1-10	2 contacts →
	Partial evidence “Collab Tech Systems specialize in providing security, network and computer solutions to improve, and secure your home or office.” Source: RevenueBase Database · checked Sep 21, 2026
25	Integra Security Solutions	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	1 contacts →
	Partial evidence “Sydney’s one-stop-shop for commercial security.” 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: list security 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 list security companies.
Partial evidence: Its own public description names part of list security companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name list security 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 88 list security companies based in Sydney, Australia

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List security companies based in Sydney, Australia at a glance

As of Sep 21, 2026

14.6%Verified-email coverage

7.4Average contacts per company

11-50Median size (employees)

100.0%Largest-city concentration · Sydney

Sep 21, 2026Page data 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 for Sydney, so it is reported there. Company counts and contact totals on this page are exact for Sydney, over 88 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 list security 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 Sydney, Australia whose own description of what they do matches “list security 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 list security 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 list security 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 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, 95 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.

List security companies by metro in Australia

List security companies in Sydney88
List security companies in Melbourne85
List security companies in Brisbane34
List security companies in Perth31

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 list security 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 list security companies are there based in Sydney, Australia?

RevenueBase identified 88 list security 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?

Commander Security Services, headquartered in Sydney, tops this list with the largest team on record.

Which city has the most list security companies?

Sydney leads with 88 headquartered companies, followed by Melbourne (85) and Brisbane (34).

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 95 verified decision-maker contacts tracked across these 88 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.