Isotope Mail Client alternatives

Isotope Mail Client is an open-source app for Mac, Windows, Linux, Online and 4 more platforms. It is free to use. Developed by Marc Nuri.

Alternatives

• Roundcube
• Mailpile
• Cloud Mail
• Nexmail
• Rainloop
• SOGo
• Horde
• SnappyMail
• Webmail Lite
• Squirrelmail
• Cypht
• NeutronMail
• Safe-mail.net
• Mailflare