CryptPad

CryptPad is an end-to-end encrypted online office suite offering collaborative document creation and editing. It provides functionalities similar to other office suites, including text documents, spreadsheets, presentations, and code editors, all with a priority on user privacy. Unique features include its zero-knowledge architecture, which prevents the server from accessing user data, and its open-source nature, which allows for independent audits and community contributions. This makes it suitable for individuals and teams seeking secure and private online collaboration, especially those who prioritize data confidentiality.