The best open source alternative to Microsoft 365 Copilot is LibreOffice. If that doesn't suit you, our users have ranked more than 50 alternatives to Microsoft 365 Copilot and ten of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Microsoft 365 Copilot are ONLYOFFICE, CryptPad, Collabora Office Classic and Proton Docs.
Comprehensive free office suite supporting word processing, advanced spreadsheets, dynamic presentations, vector drawings, math formulas, and robust database management. Fully compatible with major office formats across all operating systems, it offers extensive capabilities for personal or professional tasks.
Open-source office suite offering document, spreadsheet, and presentation editing with co-editing modes, plugin support, integration across 30+ services, robust security, and mobile access. Available in Community, Enterprise, and Home Server editions for versatile deployment.
CryptPad is a private-by-design alternative to popular office tools and cloud services. All the content stored on CryptPad is encrypted before being sent, which means nobody can access your data unless you give them the keys.
On-premise office suite featuring advanced word processing, spreadsheets, and presentations, unmatched compatibility with 100+ formats, OOXML support, six-month updates, enterprise hardening, Visio and Publisher import, PDF export, and support for 50+ languages.
Docs in Proton Drive are end-to-end encrypted so your work stays safe from data breaches, online surveillance, and can never be fed into AI models.
Calligra Suite is an office and graphic art suite by KDE. It contains applications for word processing, spreadsheets, presentation, vector graphics, and editing databases.
Experience LibreOffice in your browser with ZetaOffice, featuring device access, self-hosting or CDN deployment, API for tailored integration, and data control. Enjoy a comprehensive suite with Writer for formatting, Calc for data analysis, and Impress for presentations, optimized for performance.
Collabora Online is a powerful LibreOffice-based online office suite with collaborative editing, which supports all major document, spreadsheet and presentation file formats and works in all modern browsers.
Murena Workspace is your personal email account, your agenda and contacts, your drive on the cloud and your online office suite. All combined in one single service at murena.io, simple to use. It is powered by proven open-source software like NextCloud and OnlyOffice.
Collabora Office brings the familiar Collabora Online experience to your computer - so you can create, edit, and present with a beautiful, modern UI. Built on LibreOffice, it delivers excellent interoperability with ODF and Microsoft Office formats (DOCX/XLSX/PPTX), and exports...
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Free, Windows, full Microsoft Office (.doc, .xls), Microsoft Office Open XML, OpenDocument, and Portable Document Format support.