Company lists · Data refreshed September 2026
Top 24 Infrastructure security companies based in Australia
RevenueBase identified 623 infrastructure security companies headquartered in Australia as of September 2026 and tracks 7,611 professional contacts across them, including 3,293 with verified work emails and 442 with mobile numbers. Sydney is the largest hub.
This list covers infrastructure security companies headquartered in 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 3, 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.
The 24 largest infrastructure security companies based in Australia
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 349 | ||||
“We are an Australian-owned, full-service ICT Solutions and Cyber Security provider with a locally based team of over 450 passionate Aussies.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 2 | 123 | ||||
“Triskele Labs is one of Australia’s fastest growing cybersecurity companies.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 3 | 122 | ||||
“Optic Security Group is a leading provider of converged security risk management solutions serving the needs of corporate, enterprise, and government clients across Australia and…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 4 | 113 | ||||
“Innovative Managed Services: Bridging Assets, Systems, and Security Welcome to Renew IT, your trusted partner in delivering comprehensive managed services, systems integration…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 5 | 105 | ||||
“AUCyber is a leading Australian cyber security and secure cloud provider, specialising in supporting businesses and Governments with the latest cloud infrastructure, backup and…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 6 | 100 | ||||
“Sekuro is a cyber security and digital resiliency solutions provider that helps CIOs and CISOs take a strategic approach to cyber security risk mitigation and building business…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 7 | 98 | ||||
“We are your IT & Cyber Security partners.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 8 | 91 | ||||
“Australia’s cyber-first Managed Service Provider and true technology partner.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 9 | 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 3, 2026Thanks. The Data Team will review it. | |||||
| 10 | 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 3, 2026Thanks. The Data Team will review it. | |||||
| 11 | 63 | ||||
“Entersoft Security is an AI-enabled cybersecurity services firm helping modern enterprises build, ship, and operate secure digital products at scale.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 12 | 61 | ||||
“Skillfield is a Melbourne-born Cyber Security, AI and big data solutions provider and professional services consultancy.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 13 | 58 | ||||
“Australia’s leading developer and manufacturer of advanced cybersecurity technology, Red Piranha delivers next-generation cyber defence solutions designed to protect modern…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 14 | 58 | ||||
“Discover 3Columns, your premier destination for cutting-edge cyber security solutions.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 15 | 57 | ||||
“IPSec are specialists in information asset and cyber protection; security experts who know how to mitigate cyber risk by assisting in the protection of valuable intelligence…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 16 | 51 | ||||
“DeployPartners offer unique values and benefits that enable our clients and partners to differentiate on customer service.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 17 | 50 | ||||
“Our mission is to help our clients protect their assets, reputation, and customers from cyber threats, while also enabling them to embrace digital transformation and innovation…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 18 | 50 | ||||
“DIMIYA Tech is a Melbourne, Australia based- global Cybersecurity and IT services provider supporting organizations that require secure, scalable, and high-performance technology…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 19 | 45 | ||||
“Clarity in a complex world.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 20 | 42 | ||||
“Slipstream Cyber is a business of Interactive - Australia's leading technology solutions provider.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 21 | 42 | ||||
“FirstWave is a global cybersecurity technology company formed in 2004.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 22 | 42 | ||||
“Cythera’s cyber security solutions allow for the rapid deployment of Assessment, Protection, Monitoring & Response and Assurance technologies to meet the security needs of…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 23 | 42 | ||||
“Vectra, an Ensign company, is Australia’s trusted partner for security consulting, risk management, compliance, and managed services.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 24 | 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 3, 2026Thanks. The Data Team will review it. | |||||
Showing 24 of 623 infrastructure security companies based in Australia
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Infrastructure security companies based in Australia at a glance
As of Sep 3, 2026Companies by employee count
Verified emails by last verification
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 infrastructure security 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 Australia whose own description of what they do matches “infrastructure security 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 infrastructure security companies, and records with no verified work email. Companies headquartered outside Australia 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, 3,293 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 3, 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.
Infrastructure security companies by metro
Frequently asked
How many infrastructure security companies are there based in Australia?
RevenueBase identified 623 infrastructure security companies headquartered in 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?
Centorrino Technologies, headquartered in Coburg, tops this list with the largest team on record.
Which city has the most infrastructure security companies?
Sydney leads with 122 headquartered companies, followed by Melbourne (116) and Brisbane (54).
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 3,293 verified decision-maker contacts tracked across these 623 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 3, 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.
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