LibreOffice

Open-source real-time collaborative text editor you can self-host.

Self-hosted office suite with real-time collaboration.

CryptPad is an end-to-end encrypted, zero-knowledge collaborative office suite. Write, edit, and share documents, sheets, and code with confidence that servers never read them.

Open-source spreadsheet-database hybrid with flexible relational data modeling.

Real-time collaborative markdown note editor you can self-host — write together with rich formatting and seamless sharing.

An open-source office suite in a single HTML file — slides, docs, and sheets that run entirely in the browser.