Company lists · Data refreshed September 2026
Top 25 Biggest security companies based in Australia
RevenueBase identified 954 company matches for biggest security companies associated with Australia as of September 2026 and tracks 11,107 professional contacts across them, including 4,143 with verified work emails. Melbourne is the largest hub.
This list covers company matches for biggest 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 September 21, 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 25 largest biggest security companies based in Australia
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,813 contacts → | ||||
Exact match “At Wilson Security, we are committed to building a safer future for everyone.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 2 | 510 contacts → | ||||
Exact match “Founded in 1923, SNP is one of Australia’s leading security services providers with over 2,500 employees nationwide.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 3 | 365 contacts → | ||||
Exact match “AC3 is a leading Australian-owned and operated technology services provider helping organisations across government, healthcare, financial services, and critical infrastructure…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 4 | 352 contacts → | ||||
Exact match “We are an Australian-owned, full-service ICT Solutions and Cyber Security provider with a locally based team of over 450 passionate Aussies.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 5 | 178 contacts → | ||||
Exact match “For more than 130 years, we have stood alongside our community, protecting homes, families, businesses, and communities.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 6 | 170 contacts → | ||||
Exact match “Ensuring your business is handling cyber security risks effectively has never been more important.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 7 | 123 contacts → | ||||
Exact match “Triskele Labs is one of Australia’s fastest growing cybersecurity companies.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 8 | 122 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 · Sep 21, 2026 · View company records in RevenueBase | |||||
| 9 | 115 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 · Sep 21, 2026 · View company records in RevenueBase | |||||
| 10 | 111 contacts → | ||||
Exact match “New Era delivers Technology Solutions that securely connect people, places, and information in a rapidly changing digital world.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 11 | 104 contacts → | ||||
Exact match “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…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 12 | 102 contacts → | ||||
Exact match “We are your IT & Cyber Security partners.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 13 | 101 contacts → | ||||
Exact match “ARA Security delivers turnkey security solutions to a number of industries across Australia.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 14 | 93 contacts → | ||||
Exact match “Australia’s cyber-first Managed Service Provider and true technology partner.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 15 | 87 contacts → | ||||
Exact match “Secure Agility is a Australian-based technology partner specialising in secure managed IT services for NSW government, enterprise and mid-market organisations.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 16 | 82 contacts → | ||||
Exact match “National Protective Services is a leading professional security company, specialising in the provision of quality and tailored protective services and products to ensure optimum…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 17 | 74 contacts → | ||||
Exact match “AG Security Group is South Australia's leading and largest locally owned security organisation that has been protecting Australians for more than 35 years.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 18 | 72 contacts → | ||||
Exact match “At StickmanCyber we are on a mission to create a digital world that is safe for everyone.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 19 | 70 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 · Sep 21, 2026 · View company records in RevenueBase | |||||
| 20 | 62 contacts → | ||||
Exact match “a23 is a straight-talking, Australian-owned IT consulting firm focused on what matters most to government and business.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 21 | 62 contacts → | ||||
Exact match “Skillfield is a Melbourne-born Cyber Security, AI and big data solutions provider and professional services consultancy.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 22 | 61 contacts → | ||||
Exact match “Welcome to Ampion.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 23 | 59 contacts → | ||||
Exact match “Guarding Solutions | Armed Guards | 24/7 Grade A1 Monitoring | Mobile Patrols | Electronics | Advisory EXEC Security is an Australian owned, national company that specialises in…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 24 | 59 contacts → | ||||
Exact match “For decades, LKA Group has provided the highest level of service to all clients, from small business to multinational corporations and governments.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 25 | 57 contacts → | ||||
Exact match “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…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “biggest security companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 954 biggest security companies based in Australia
See the full list, filter by size, metro and specialty, and access 4,143 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Biggest security companies based in Australia at a glance
As of Sep 21, 2026Companies by employee count
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 954 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 “biggest 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 4,143 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 September 21, 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 “biggest security companies”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many biggest security companies are there based in Australia?
RevenueBase identified 954 company matches for biggest security companies associated with Australia as of September 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?
Wilson Security tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most biggest security companies?
Melbourne leads with 170 company records, followed by Sydney (163) and Brisbane (64).
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 4,143 professional contacts with verified work emails tracked across these 954 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 September 21, 2026.
Ready to reach these companies? Verified emails and direct dials for all 954 biggest security companies based in Australia. Start with a free account, no credit card.
Download this list →Related lists
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Browse the directory
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.
More company lists
- All company lists
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- Lists A-Z
- New lists
- Biggest security companies based in Adelaide, Australia
- Biggest security companies based in Brisbane, Australia
- Biggest security companies based in Canberra, Australia
- Biggest security companies based in Melbourne, Australia
- Biggest security companies based in Perth, Australia
- Biggest security companies based in Sydney, Australia
Company intelligence · public preview
Top 25 biggest security companies based in Australia
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 954 matching company records for biggest security companies based in Australia, with 11,107 tracked contacts and 4,143 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 21, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 biggest security companies based in Australia
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  Wilson Securitywilsonsecurity.com.auHQ: Essendon Fields, AustraliaReported employees: 5,001-10,000 | Essendon Fields, Australia | 5,001-10,000 | Exact match | 1,813 contacts → |
“At Wilson Security, we are committed to building a safer future for everyone.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  SNP Securitysnpsecurity.com.auHQ: West Ryde, AustraliaReported employees: 1,001-5,000 | West Ryde, Australia | 1,001-5,000 | Exact match | 510 contacts → |
“Founded in 1923, SNP is one of Australia’s leading security services providers with over 2,500 employees nationwide.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Ac3ac3.com.auHQ: Haymarket, AustraliaReported employees: 201-500 | Haymarket, Australia | 201-500 | Exact match | 365 contacts → |
“AC3 is a leading Australian-owned and operated technology services provider helping organisations across government, healthcare, financial services, and critical infrastructure…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Centorrino Technologiesct.com.auHQ: Coburg, AustraliaReported employees: 201-500 | Coburg, Australia | 201-500 | Exact match | 352 contacts → |
“We are an Australian-owned, full-service ICT Solutions and Cyber Security provider with a locally based team of over 450 passionate Aussies.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  ADT Security Australiaadtsecurity.com.auHQ: Rydalmere, AustraliaReported employees: 501-1,000 | Rydalmere, Australia | 501-1,000 | Exact match | 178 contacts → |
“For more than 130 years, we have stood alongside our community, protecting homes, families, businesses, and communities.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Risk Associates - Emea & Asiariskassociates.comHQ: Bella Vista, AustraliaReported employees: 51-200 | Bella Vista, Australia | 51-200 | Exact match | 170 contacts → |
“Ensuring your business is handling cyber security risks effectively has never been more important.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Triskele Labstriskelelabs.comHQ: Melbourne, AustraliaReported employees: 51-200 | Melbourne, Australia | 51-200 | Exact match | 123 contacts → |
“Triskele Labs is one of Australia’s fastest growing cybersecurity companies.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Infotrustinfotrust.com.auHQ: Sydney, AustraliaReported employees: 201-500 | Sydney, Australia | 201-500 | Exact match | 122 contacts → |
“Infotrust (ITS) is Australia’s leading cyber security and managed technology services provider listed on the ASX.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Renew ITrenew-it.comHQ: Lane Cove West, AustraliaReported employees: 51-200 | Lane Cove West, Australia | 51-200 | Exact match | 115 contacts → |
“Innovative Managed Services: Bridging Assets, Systems, and Security Welcome to Renew IT, your trusted partner in delivering comprehensive managed services, systems integration…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  NEW ERA Technology AUneweratech.com.auHQ: Mascot, AustraliaReported employees: 501-1,000 | Mascot, Australia | 501-1,000 | Exact match | 111 contacts → |
“New Era delivers Technology Solutions that securely connect people, places, and information in a rapidly changing digital world.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Sekurosekuro.ioHQ: AustraliaReported employees: 51-200 | Australia | 51-200 | Exact match | 104 contacts → |
“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…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Ever Nimbleevernimble.comHQ: West Perth, AustraliaReported employees: 51-200 | West Perth, Australia | 51-200 | Exact match | 102 contacts → |
“We are your IT & Cyber Security partners.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  ARA Securitysecurity.aragroup.com.auHQ: Kingsgrove, AustraliaReported employees: 201-500 | Kingsgrove, Australia | 201-500 | Exact match | 101 contacts → |
“ARA Security delivers turnkey security solutions to a number of industries across Australia.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Kaine Mathrick Techkmtech.com.auHQ: Port Melbourne, AustraliaReported employees: 51-200 | Port Melbourne, Australia | 51-200 | Exact match | 93 contacts → |
“Australia’s cyber-first Managed Service Provider and true technology partner.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Secure Agilitysecureagility.comHQ: Sydney, AustraliaReported employees: 51-200 | Sydney, Australia | 51-200 | Exact match | 87 contacts → |
“Secure Agility is a Australian-based technology partner specialising in secure managed IT services for NSW government, enterprise and mid-market organisations.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  National Protective Servicesnationalprotectiveservices.com.auHQ: South Melbourne, AustraliaReported employees: 1,001-5,000 | South Melbourne, Australia | 1,001-5,000 | Exact match | 82 contacts → |
“National Protective Services is a leading professional security company, specialising in the provision of quality and tailored protective services and products to ensure optimum…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  AG Security Groupagsecurity.com.auHQ: Adelaide, AustraliaReported employees: 51-200 | Adelaide, Australia | 51-200 | Exact match | 74 contacts → |
“AG Security Group is South Australia's leading and largest locally owned security organisation that has been protecting Australians for more than 35 years.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Stickmancyberstickmancyber.comHQ: Macquarie Park, AustraliaReported employees: 51-200 | Macquarie Park, Australia | 51-200 | Exact match | 72 contacts → |
“At StickmanCyber we are on a mission to create a digital world that is safe for everyone.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Northbridge Systemsnorth-bridge.com.auHQ: Sydney, AustraliaReported employees: 51-200 | Sydney, Australia | 51-200 | Exact match | 70 contacts → |
“Northbridge is an Australian-owned cybersecurity services provider with more than 25 years’ experience delivering engineered, integrated and fully managed security services to…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  A23a23.com.auHQ: Canberra, AustraliaReported employees: 51-200 | Canberra, Australia | 51-200 | Exact match | 62 contacts → |
“a23 is a straight-talking, Australian-owned IT consulting firm focused on what matters most to government and business.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Skillfieldskillfield.com.auHQ: Melbourne, AustraliaReported employees: 51-200 | Melbourne, Australia | 51-200 | Exact match | 62 contacts → |
“Skillfield is a Melbourne-born Cyber Security, AI and big data solutions provider and professional services consultancy.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Ampionampion.com.auHQ: Melbourne, AustraliaReported employees: 501-1,000 | Melbourne, Australia | 501-1,000 | Exact match | 61 contacts → |
“Welcome to Ampion.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Exec Securityexecsecurity.com.auHQ: Melbourne, AustraliaReported employees: 501-1,000 | Melbourne, Australia | 501-1,000 | Exact match | 59 contacts → |
“Guarding Solutions | Armed Guards | 24/7 Grade A1 Monitoring | Mobile Patrols | Electronics | Advisory EXEC Security is an Australian owned, national company that specialises in…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  LKA Grouplkagroup.com.auHQ: Carlton, AustraliaReported employees: 51-200 | Carlton, Australia | 51-200 | Exact match | 59 contacts → |
“For decades, LKA Group has provided the highest level of service to all clients, from small business to multinational corporations and governments.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Ipsec PTY LTDipsec.com.auHQ: Cremorne, AustraliaReported employees: 11-50 | Cremorne, Australia | 11-50 | Exact match | 57 contacts → |
“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…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 954 company matches
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Biggest security companies: dataset insights
September 21, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
952 records in the displayed employee bands.
2 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 954 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 21, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for biggest security companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many biggest security companies did RevenueBase find based in Australia?
The saved snapshot records 954 matching company records, 11,107 tracked contacts and 4,143 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 21, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Biggest security companies by geography
- Biggest security companies based in Adelaide, Australia
- Biggest security companies based in Brisbane, Australia
- Biggest security companies based in Canberra, Australia
- Biggest security companies based in Melbourne, Australia
- Biggest security companies based in Perth, Australia
- Biggest security companies based in Sydney, Australia
- Biggest security companies based in Barueri, Brazil
- Biggest security companies based in Belo Horizonte, Brazil
- Biggest security companies based in Brasilia, Brazil
- Biggest security companies based in Curitiba, Brazil
- Biggest security companies based in Porto Alegre, Brazil
- Biggest security companies based in Rio De Janeiro, Brazil
Browse the directory
Cite this list
RevenueBase Data Team. Top 25 biggest security companies based in Australia. Snapshot: September 21, 2026. https://revenuebase.ai/companies/biggest-security-companies/australia.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Biggest security companies based in Adelaide, Australia
- Biggest security companies based in Brisbane, Australia
- Biggest security companies based in Canberra, Australia
- Biggest security companies based in Melbourne, Australia
- Biggest security companies based in Perth, Australia
- Biggest security companies based in Sydney, Australia
Company intelligence · public preview
Top 25 biggest security companies based in Australia
RevenueBase records 954 matching company records for biggest security companies based in Australia, with 11,107 tracked contacts and 4,143 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 21, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 biggest security companies based in Australia
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Wilson Securitywilsonsecurity.com.au HQ: Essendon Fields, AustraliaReported employees: 5,001-10,000 | Essendon Fields, Australia | 5,001-10,000 | Exact match | 1,813 contacts → |
“At Wilson Security, we are committed to building a safer future for everyone.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | SNP Securitysnpsecurity.com.au HQ: West Ryde, AustraliaReported employees: 1,001-5,000 | West Ryde, Australia | 1,001-5,000 | Exact match | 510 contacts → |
“Founded in 1923, SNP is one of Australia’s leading security services providers with over 2,500 employees nationwide.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Ac3ac3.com.au HQ: Haymarket, AustraliaReported employees: 201-500 | Haymarket, Australia | 201-500 | Exact match | 365 contacts → |
“AC3 is a leading Australian-owned and operated technology services provider helping organisations across government, healthcare, financial services, and critical infrastructure…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Centorrino Technologiesct.com.au HQ: Coburg, AustraliaReported employees: 201-500 | Coburg, Australia | 201-500 | Exact match | 352 contacts → |
“We are an Australian-owned, full-service ICT Solutions and Cyber Security provider with a locally based team of over 450 passionate Aussies.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | ADT Security Australiaadtsecurity.com.au HQ: Rydalmere, AustraliaReported employees: 501-1,000 | Rydalmere, Australia | 501-1,000 | Exact match | 178 contacts → |
“For more than 130 years, we have stood alongside our community, protecting homes, families, businesses, and communities.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Risk Associates - Emea & Asiariskassociates.com HQ: Bella Vista, AustraliaReported employees: 51-200 | Bella Vista, Australia | 51-200 | Exact match | 170 contacts → |
“Ensuring your business is handling cyber security risks effectively has never been more important.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Triskele Labstriskelelabs.com HQ: Melbourne, AustraliaReported employees: 51-200 | Melbourne, Australia | 51-200 | Exact match | 123 contacts → |
“Triskele Labs is one of Australia’s fastest growing cybersecurity companies.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Infotrustinfotrust.com.au HQ: Sydney, AustraliaReported employees: 201-500 | Sydney, Australia | 201-500 | Exact match | 122 contacts → |
“Infotrust (ITS) is Australia’s leading cyber security and managed technology services provider listed on the ASX.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Renew ITrenew-it.com HQ: Lane Cove West, AustraliaReported employees: 51-200 | Lane Cove West, Australia | 51-200 | Exact match | 115 contacts → |
“Innovative Managed Services: Bridging Assets, Systems, and Security Welcome to Renew IT, your trusted partner in delivering comprehensive managed services, systems integration…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | NEW ERA Technology AUneweratech.com.au HQ: Mascot, AustraliaReported employees: 501-1,000 | Mascot, Australia | 501-1,000 | Exact match | 111 contacts → |
“New Era delivers Technology Solutions that securely connect people, places, and information in a rapidly changing digital world.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Sekurosekuro.io HQ: AustraliaReported employees: 51-200 | Australia | 51-200 | Exact match | 104 contacts → |
“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…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Ever Nimbleevernimble.com HQ: West Perth, AustraliaReported employees: 51-200 | West Perth, Australia | 51-200 | Exact match | 102 contacts → |
“We are your IT & Cyber Security partners.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | ARA Securitysecurity.aragroup.com.au HQ: Kingsgrove, AustraliaReported employees: 201-500 | Kingsgrove, Australia | 201-500 | Exact match | 101 contacts → |
“ARA Security delivers turnkey security solutions to a number of industries across Australia.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Kaine Mathrick Techkmtech.com.au HQ: Port Melbourne, AustraliaReported employees: 51-200 | Port Melbourne, Australia | 51-200 | Exact match | 93 contacts → |
“Australia’s cyber-first Managed Service Provider and true technology partner.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Secure Agilitysecureagility.com HQ: Sydney, AustraliaReported employees: 51-200 | Sydney, Australia | 51-200 | Exact match | 87 contacts → |
“Secure Agility is a Australian-based technology partner specialising in secure managed IT services for NSW government, enterprise and mid-market organisations.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | National Protective Servicesnationalprotectiveservices.com.au HQ: South Melbourne, AustraliaReported employees: 1,001-5,000 | South Melbourne, Australia | 1,001-5,000 | Exact match | 82 contacts → |
“National Protective Services is a leading professional security company, specialising in the provision of quality and tailored protective services and products to ensure optimum…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | AG Security Groupagsecurity.com.au HQ: Adelaide, AustraliaReported employees: 51-200 | Adelaide, Australia | 51-200 | Exact match | 74 contacts → |
“AG Security Group is South Australia's leading and largest locally owned security organisation that has been protecting Australians for more than 35 years.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Stickmancyberstickmancyber.com HQ: Macquarie Park, AustraliaReported employees: 51-200 | Macquarie Park, Australia | 51-200 | Exact match | 72 contacts → |
“At StickmanCyber we are on a mission to create a digital world that is safe for everyone.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Northbridge Systemsnorth-bridge.com.au HQ: Sydney, AustraliaReported employees: 51-200 | Sydney, Australia | 51-200 | Exact match | 70 contacts → |
“Northbridge is an Australian-owned cybersecurity services provider with more than 25 years’ experience delivering engineered, integrated and fully managed security services to…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | A23a23.com.au HQ: Canberra, AustraliaReported employees: 51-200 | Canberra, Australia | 51-200 | Exact match | 62 contacts → |
“a23 is a straight-talking, Australian-owned IT consulting firm focused on what matters most to government and business.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Skillfieldskillfield.com.au HQ: Melbourne, AustraliaReported employees: 51-200 | Melbourne, Australia | 51-200 | Exact match | 62 contacts → |
“Skillfield is a Melbourne-born Cyber Security, AI and big data solutions provider and professional services consultancy.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Ampionampion.com.au HQ: Melbourne, AustraliaReported employees: 501-1,000 | Melbourne, Australia | 501-1,000 | Exact match | 61 contacts → |
“Welcome to Ampion.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Exec Securityexecsecurity.com.au HQ: Melbourne, AustraliaReported employees: 501-1,000 | Melbourne, Australia | 501-1,000 | Exact match | 59 contacts → |
“Guarding Solutions | Armed Guards | 24/7 Grade A1 Monitoring | Mobile Patrols | Electronics | Advisory EXEC Security is an Australian owned, national company that specialises in…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | LKA Grouplkagroup.com.au HQ: Carlton, AustraliaReported employees: 51-200 | Carlton, Australia | 51-200 | Exact match | 59 contacts → |
“For decades, LKA Group has provided the highest level of service to all clients, from small business to multinational corporations and governments.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Ipsec PTY LTDipsec.com.au HQ: Cremorne, AustraliaReported employees: 11-50 | Cremorne, Australia | 11-50 | Exact match | 57 contacts → |
“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…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 954 company matches
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Biggest security companies: dataset insights
September 21, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
952 records in the displayed employee bands.
2 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 954 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 21, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for biggest security companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many biggest security companies did RevenueBase find based in Australia?
The saved snapshot records 954 matching company records, 11,107 tracked contacts and 4,143 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 21, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
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Cite this list
RevenueBase Data Team. Top 25 biggest security companies based in Australia. Snapshot: September 21, 2026. https://revenuebase.ai/companies/biggest-security-companies/australia.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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