The most popular alternative is Rambox, which is both free and Open Source. If that doesn't suit you, our users have ranked 44 alternatives to Shift so hopefully you can find a suitable replacement. Other interesting Shift alternatives are Mailspring (Freemium), Ferdi (Free, Open Source), Postbox (Paid) and Hootsuite (Freemium).
- Free, open source and cross platform messaging and emailing app that combines common web applications into one.
- Boost your productivity and send better email with Mailspring, a beautiful, fast email client for Mac, Windows, and Linux. Mailspring is free to use and an optional pro version adds read receipts, send later, reminders and more.
- Postbox is an email application that helps you organize your work life and get stuff done.
- Social media and brand management solution to schedule and track posts and analyze your social reach.
- Airmail is a lightweight and lightning fast mail client for Mac. Feature list:Accounts:- Unified Inbox and folders- Multi Account with editable html signatures.
- Ripcord is a desktop chat client for group-centric services like Slack and Discord. It provides a traditional compact desktop interface designed for power users.
- Bringing the Gmail & Google Inbox experience to your desktop in a neatly packaged app .
- A whole new way of using email. Reimagined for the modern age, it transforms the way you communicate, share media, interact with notifications, manage your inbox, stay productive or track updates from your favorite publishers and brands.
- Web2Desk is a tool to convert your favorite websites to Desktop app in just one click. Regardless of Platform( OSX, Linux, Windows) we got it covered and it's Free!.