Open365 is an all-in-one productivity suite, based on KDE, Seafile, LibreOffice, Docker, and Jitsi. Developed by eyeOS
License: Open Source
Apple Mail is a robust email client that excels in integration with Apple devices and offline access, making it ideal for users within the Apple ecosystem. In contrast, Open365 is better suited for teams looking for collaborative features and web-based access, although it requires a constant internet connection and may not be as intuitive.