Company lists · Data verified August 2026

Top 12 Cloud email security companies based in Australia

Name: Cloud email security companies based in Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 39 companies tracked

There are 39 cloud email security companies headquartered in Australia (RevenueBase, August 2026). RevenueBase tracks 614 professional contacts across them, including 143 with verified work emails and 98 with mobile numbers. Sydney is the largest hub.

This list covers cloud email security companies headquartered in Australia, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

39Companies

614Contacts tracked

143Verified emails

98Mobile numbers

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The 12 largest cloud email security companies based in Australia

Ranked by team size

Top 12 of 39 cloud email security companies based in Australia, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Webroot	Chatswood	501-1,000	199	75
2	Aucyber	Fortitude Valley	51-200	105	5
3	Plerion	Sydney	11-50	38	18
4	Astralas	Cremorne	51-200	35	20
5	Mailguard A Globalguard Company	Melbourne	51-200	25	16
6	Aera Cloud And Security Group	Alexandria	51-200	11	1
7	Mailguard 365 A Globalguard Product	Melbourne	51-200	6	1
8	Cogniso	Sydney	11-50	3	1
9	Aucloud	Fyshwick	51-200	2	2
10	Southern Cyber	Adelaide	11-50	2	1
11	Cybercloud Consulting	Brisbane	1-10	1	1
12	Bizc IT	Jannali	1-10	1	1

Showing 12 of 39 cloud email security companies based in Australia

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Cloud email security companies based in Australia at a glance

As of Aug 28, 2026

11-50Median size (employees)

SydneyLargest hub · 10 HQs

98Contacts with mobile numbers

1Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

501-1,000

10001+

Cloud email security companies by metro

Metro	Companies
Cloud email security companies in Sydney	10
Cloud email security companies in Melbourne	8
Cloud email security companies in Brisbane	3
Cloud email security companies in Cremorne	2
Cloud email security companies in Fortitude Valley	1
Cloud email security companies in South Melbourne	1
Cloud email security companies in Fyshwick	1
Cloud email security companies in Gold Coast	1

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “cloud email security companies”, with match quality audited by blind human judging, and headquartered in Australia.
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: Contact records re-verify on a rolling cadence; 1 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many cloud email security companies are there based in Australia?

There are 39 cloud email security companies headquartered in Australia as of August 2026 (RevenueBase).

What is the largest company on this list?

Webroot, headquartered in Chatswood, tops this list with the largest team on record.

Which city has the most cloud email security companies?

Sydney leads with 10 headquartered companies, followed by Melbourne (8) and Brisbane (3).

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 143 verified decision-maker contacts tracked across these 39 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.