Murmur

Murmur is an end-to-end encrypted chat room with no data retention — your messages, password, and keys are never stored, and nothing in your browser survives closing the tab. The server only ever holds encrypted data it cannot read. Set a password and share the one-click invite link (the password rides in the link's # fragment, never sent to the server), or share the room link and the password on separate channels. Each room self-destructs after a period of inactivity you choose.