Company lists · Data refreshed November 2026

Top 23 Managed IT security companies based in Australia

RevenueBase identified 516 company matches for managed IT security companies associated with Australia as of November 2026 and tracks 5,719 professional contacts across them, including 2,441 with verified work emails. Melbourne is the largest hub.

This list covers company matches for managed IT security companies associated with Australia, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 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 RevenueBase SmartSearch · Exact Recorded Nov 5, 2026 How this list was built
516Companies
5,719Contacts tracked
2,441Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 23 largest managed IT security companies based in Australia

Ranked by team size
Top 23 of 516 company matches for managed IT security companies based in Australia, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 5, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchArundel, AustraliaHQ recorded Nov 5, 2026n/a252 contacts →

Exact match

“ONGC Systems provides businesses with comprehensive IT services, that automate and streamline operations, reduce risk and increase stability while lowering the cost of system…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
2Exact matchSydney, AustraliaHQ recorded Nov 5, 2026201-500181 contacts →

Exact match

“Virtual IT Group is Australia & New Zealand's leading managed IT cybersecurity provider.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
3Exact matchSydney, AustraliaHQ recorded Nov 5, 2026201-500138 contacts →

Exact match

“Infotrust (ITS) is Australia’s leading cyber security and managed technology services provider listed on the ASX.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
4Exact matchNorwest, AustraliaHQ recorded Nov 5, 202651-200126 contacts →

Exact match

“At Exigo Tech, we believe that technology should be simple, accessible, and a catalyst for business success.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
5Exact matchLane Cove West, AustraliaHQ recorded Nov 5, 202651-200125 contacts →

Exact match

“Innovative Managed Services: Bridging Assets, Systems, and Security Welcome to Renew IT, your trusted partner in delivering comprehensive managed services, systems integration…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
6Exact matchMelbourne, AustraliaHQ recorded Nov 5, 202651-200121 contacts →

Exact match

“Triskele Labs is one of Australia’s fastest growing cybersecurity companies.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
7Exact matchNorwest, AustraliaHQ recorded Nov 5, 202611-50109 contacts →

Exact match

“Welcome to Platinum Technology.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
8Exact matchVic, AustraliaHQ recorded Nov 5, 202651-200101 contacts →

Exact match

“Advance Vision Technology (AVTech) is a leading managed service provider with a focus on cyber-security, ‘making IT Happen’ for our customers since 1992.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
9Exact matchSydney, AustraliaHQ recorded Nov 5, 202651-20094 contacts →

Exact match

“Secure Agility is an Australian technology partner delivering secure managed IT services since 2002.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
10Exact matchNorth Sydney, AustraliaHQ recorded Nov 5, 202651-20090 contacts →

Exact match

“CNS takes pride in our ability to deliver successful solutions to our customers.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
11Exact matchSydney, AustraliaHQ recorded Nov 5, 202651-20089 contacts →

Exact match

“With a proven track record of 30 years, experteq is a proudly Australian IT company that combines the strengths of two storied brands – TAS and Experteq – to deliver outstanding…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
12Exact matchPort Melbourne, AustraliaHQ recorded Nov 5, 202651-20084 contacts →

Exact match

“Australia’s cyber-first Managed Service Provider and true technology partner.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
13Exact matchMelbourne, AustraliaHQ recorded Nov 5, 202611-5078 contacts →

Exact match

“Australia's Multisite Security Specialist.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
14Exact matchSydney, AustraliaHQ recorded Nov 5, 202651-20075 contacts →

Exact match

“Northbridge is an Australian-owned cybersecurity services provider with more than 25 years’ experience delivering engineered, integrated and fully managed security services to…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
15Exact matchToowong, AustraliaHQ recorded Nov 5, 202651-20057 contacts →

Exact match

“OneTeam IT - means you’ll be benefitting from over 60 years of collective experience in maximising return on IT investments.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
16Exact matchMelbourne, AustraliaHQ recorded Nov 5, 202651-20055 contacts →

Exact match

“DIMIYA Tech is a Melbourne, Australia based- global Cybersecurity and IT services provider supporting organizations that require secure, scalable, and high-performance technology…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
17Exact matchMelbourne, AustraliaHQ recorded Nov 5, 202651-20047 contacts →

Exact match

“Affinity MSP is consistently recognised among the best MSPs in Australia, delivering Managed IT Support, cybersecurity, and cloud services to businesses nationwide.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
18Exact matchSlacks Creek, AustraliaHQ recorded Nov 5, 202651-20047 contacts →

Exact match

“What we do TechPath empowers businesses and the people they employ through innovative IT strategies.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
19Exact matchMulgrave, AustraliaHQ recorded Nov 5, 202651-20044 contacts →

Exact match

“Clarity in a complex world.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
20Exact matchSydney, AustraliaHQ recorded Nov 5, 202611-5043 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
21Exact matchAdelaide, AustraliaHQ recorded Nov 5, 202651-20041 contacts →

Exact match

“Vectra, an Ensign company, is Australia’s trusted partner for security consulting, risk management, compliance, and managed services.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
22Exact matchOatley, AustraliaHQ recorded Nov 5, 2026n/a41 contacts →

Exact match

“Most small businesses don’t realise their IT systems are a risk until something stops working, data is lost, or a cyber issue hits.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
23Exact matchCanberra, AustraliaHQ recorded Nov 5, 202651-20039 contacts →

Exact match

“When it comes to security there's no shortage of companies ready to tell you about your vulnerabilities.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase

Showing 23 of 516 managed IT security companies based in Australia

See the full list, filter by size, metro and specialty, and access 2,441 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Managed IT security companies based in Australia at a glance

As of Nov 5, 2026
42.7%Verified-email coverage
11.1Average contacts per company
1-10Median size (employees)
16.1%Largest-city concentration · Melbourne
Nov 5, 2026Page data refreshed

Companies by employee count

1-10
282
11-50
183
51-200
38
201-500
5
501-1,000
2
1,001-5,000
1

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 516 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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
Company records associated with Australia whose business descriptions match “managed IT security companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 2,441 professional contacts with verified work emails across the full matched dataset. 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 November 5, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “managed IT security companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many managed IT security companies are there based in Australia?

RevenueBase identified 516 company matches for managed IT security companies associated with Australia as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Ongc Systems tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most managed IT security companies?

Melbourne leads with 83 company records, followed by Sydney (72) and Brisbane (26).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 2,441 professional contacts with verified work emails tracked across these 516 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 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.