Keybase Chat provides an easy-to-use, end-to-end encrypted chat built into the producing company’s earlier Keybase encrypted file sharing software. Unlike other encrypted messaging services such as WhatsApp or Signal, Keybase Chat works with public accounts and usernames you already have, so there’s no need to exchange phone numbers, email addresses or encryption keys.
Anyone can send a Keybase Chat message to anyone else on the internet — even if they haven’t signed up for Keybase yet. The Keybase Chat allows for 4,000-character messages and attachments, and includes some basic blocking and muting features.
Keybase is currently available for macOS, Windows and Linux platforms, with a mobile version launching “soon.”