Online collaboration often comes at the cost of privacy. CryptPad is a collaboration suite that is end-to-end encrypted and open-source. All data on CryptPad is encrypted in the browser, so no readable content leaves the user’s device.
Matrix chat: https://app.element.io/#/room/#cryptpad:matrix.xwiki.com
With CryptPad you can have both collaboration and privacy. It offers the convenience and functionality that is expected of online tools, with the additional guarantee that only the people you want to collaborate with have access to your data.
Not available yet
NGI Project: Dapsi