When comparing Microsoft Outlook 365 vs Opera Mail, the Slant community recommends Opera Mail for most people. In the question“What is the best desktop Email client for Windows 10?” Opera Mail is ranked 12th while Microsoft Outlook 365 is ranked 16th. The most important reason people chose Opera Mail is:
The design of the UI in Opera Mail is clean and intuitive, making for an easy to use client.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Clean UI
Pro Dark Mode
Pro Native calendar sync with Outlook for Mobile
Pro Strong search feature and offline access
Pro Integrated with Microsoft Office Products
Easy to add file attachments, take notes on meetings in OneNote, etc.
Pro Intuitive user interface
The design of the UI in Opera Mail is clean and intuitive, making for an easy to use client.
Pro Very efficient search
Be it the subject or the sender, it is very fast and accurate.
Pro Opera Mail CAN BE set as default email client in Windows 8 & 10
Pro Automagic smart filtering
After a bit of use Opera learns what e-mail belongs in what folder just by previous usage. This makes for a convenient way to have e-mails filtered without having to manually mange every e-mail.
Pro Free and based on Mozilla code
Opera Mail is completely free to download and use and it is based on Mozilla's code, which is what makes it a bit similar to Thunderbird in looks and function.
Cons
Con Being discontinued
Opera Mail will be end of lifed per Opera website
Con Very limited feature set
Compared to Thunderbird.
Con Sync is slow
Opera tends to be slower on e-mail sync when compared to other popular clients.