When comparing Mozilla Thunderbird vs Canary Mail, the Slant community recommends Mozilla Thunderbird for most people. In the question“What are the best e-mail clients for macOS?” Mozilla Thunderbird is ranked 3rd while Canary Mail is ranked 7th.
Ranked in these QuestionsQuestion Ranking
Pro Lightning Calendar and Address Book integration
Pro Free (as in freedom and beer)
Pro Good filtering system
Mozilla Thunderbird offers a flexible filtering system with the ability to set flags and read/unread, as well as sort/assign to new mail directories. There are also numerous plugins available to assist in the filtering.
Pro Consistent and involving a moderate learning curve
The app design of Mozilla Thunderbird has not changed significantly since its beginning, making its learning curve almost non-existent.
Pro Available on Linux, OS X and Windows
Pro Large assortment of plugins available
Mozilla Thunderbird offers a huge amount of extensions to expand the usability and options of the client.
Pro Very reliable
Version after version, Mozilla Thunderbird works as expected.
Pro Tabs for navigation
Pro No personal data stored on servers
No access tokens, passwords, attachments or email itself is stored on Canary servers.
Pro Gorgeous and intuitive
Pro Local email database is encrypted on disk
Canary stores your local email database encrypted.
Pro Pretty Good Privacy or PGP built-in
Pro Seamlessly integrates with iOS verion
Gone are the days of manual setup of phone email clients! Canary Mail syncs not just your accounts but all of your settings and even signatures on iCloud.
Con Development slowed to only focus on stability and security
Mozilla Thunderbird has slowed down its development of features to only focus resources on security and stability.
Con Outdated interface
Thunderbird's interface is very outdated and unpleasant. It feels more like a Windows XP application than like a modern MacOS one.
Con Terrible integration with macOS
Simple things - drag/dropping pictures doesn't work, for instance.
Con Poor handling of new emails
You sometimes need to wait very long before your email actually gets delivered.
Con Windows moves randomly
When you create a new email, the new windows is often misplaced so that you have to move it to reach the "Send" button.
Con Poor text editing capabilities
The cursor is laggy so you're better off using keyboard shortcuts.
Con Show NO show
It'll show I have new email as a counter but I'm not able to view them.