Open-source alternatives to Microsoft 365

2 community-reviewed projects you can use instead of Microsoft 365.

1. ONLYOFFICE Docs - A collaborative online office suite with web editors for documents, spreadsheets, presentations, forms and PDFs, highly compatible with DOCX, XLSX and PPTX formats. Self-hostable, and also available on desktop and mobile. (Licence: AGPL-3.0)
2. CryptPad - CryptPad is an end-to-end encrypted, open-source collaborative office suite with rich text documents, spreadsheets, presentations, forms, kanban boards, a whiteboard, a code/Markdown editor and an encrypted drive, where encryption happens in the browser so the server can never read your content. Use it free on a public instance or self-host it. (Licence: AGPL-3.0)