CryptPad is the zero knowledge realtime collaborative editor. Developed by XWiki Labs
License: Open Source
Etherpad (EtherPad)Archived copy EtherPad Open Source Release, Google Code is a web-based collaborative real-time editor, allowing authors to simultaneously edit a text document, and see all of the participants edit in real-time, with the ability to display each authors text in their own color. Developed by The Etherpad Foundation
License: Open Source
Cryptpad is a privacy-focused collaboration tool that supports a range of features including file storage and encryption, making it suitable for secure document editing. In contrast, Etherpad is a lightweight and straightforward tool that excels in real-time collaborative editing but lacks some of the advanced features found in Cryptpad, such as built-in file storage and enhanced security options.