Open365 Alternatives for Linux

LibreOffice is a powerful, free, and open-source office suite for text editing, spreadsheets, presentations, and more. It's compatible with a wide range of file formats, including Microsoft Office documents, making it a versatile alternative for personal and professional use across various operating systems.

Apache OpenOffice is a comprehensive and free office suite providing essential tools for document creation, spreadsheet analysis, captivating presentations, and more. It offers cross-platform compatibility and support for various file formats.

WPS Office is a comprehensive office suite providing writing, presentation, and spreadsheet tools. It boasts high compatibility with Microsoft Office formats and a user-friendly tabbed interface, making it a viable alternative for various platforms including Windows, Linux, iOS, and Android.

ONLYOFFICE is a powerful and secure office suite offering online document, spreadsheet, and presentation editors. It fosters collaboration with real-time co-editing and integrates seamlessly with various cloud storage services, providing a robust platform for both individual and team productivity.

Claws Mail is a powerful yet lightweight, open-source email and news client built on GTK+. It's known for its speed, stability, rich feature set, and high degree of customization, making it an excellent choice for users demanding control and efficiency.

OpenProject is a powerful, web-based open-source project management software designed for teams of all sizes. It offers comprehensive tools for managing projects, tasks, teams, and communication in one centralized platform. Ideal for organizations prioritizing collaboration, flexibility, and data control.

KMail is a powerful and flexible email client tightly integrated with the Kontact personal information manager suite. Part of the KDE ecosystem, it offers robust features for managing your email, including strong encryption options, support for multiple protocols like IMAP, POP3, and Exchange, and seamless integration with other Kontact components like the calendar and address book.