Thunderbird
Open Source
Thunderbird is a open source mail client developed and maintained by Mozilla foundation.
Apple Mail
Free
Apple Mail is an email client included with the operating systems macOS, iOS and watchOS by Apple Inc.
OpenProject
Open Source
OpenProject is a web-based project management system for location-independent team collaboration.
Polymail
Freemium
Polymail is an email application for OS X and iOS known for its clean interface and additional features atop the Gmail platform.
Microsoft Office Outlook
Commercial
Microsoft Outlook is a personal information manager from Microsoft.
Sylpheed
Open Source
Sylpheed is an open-source e-mail client and news client licensed under the GPL.
Spark
Free
Spark is a fast, smart mail manager app.
MailMate
Commercial
MailMate is an IMAP email client for macOS featuring extensive keyboard control, Markdown integrated email composition, advanced search conditions.
Compare Opera Mail with alternatives
Compare Thunderbird and Opera Mail and decide which is most suitable for you.
Compare Microsoft Office Outlook and Opera Mail and decide which is most suitable for you.
Compare Apple Mail and Opera Mail and decide which is most suitable for you.
Compare Sylpheed and Opera Mail and decide which is most suitable for you.
Compare OpenProject and Opera Mail and decide which is most suitable for you.
Compare Polymail and Opera Mail and decide which is most suitable for you.
Compare MailMate and Opera Mail and decide which is most suitable for you.