CryptPad

CryptPad is an open-source office suite for online collaboration. The server cannot read your documents, all encryption happens on your device.

Included applications:

• Rich Text documents

• Spreadsheets

• Code/Markdown editor

• Kanban boards

• Slides

• Whiteboard

• Polls

• Zero-knowledge encryption

• Real-time collaboration with author colors

• Chat and comment systems built-in

• Self-hosting available

• Official instance hosted by XWiki-SAS