SimpleX Chat

The application provides a private, encrypted messaging experience that does not rely on any user identifiers, including random IDs. Connections are established through shared links or QR codes, enabling users to exchange text messages and place voice calls while keeping the content and participant information hidden from servers. End‑to‑end encryption is applied to all communications, ensuring that only the intended recipients can read the messages.

It targets individuals and groups that prioritize privacy and control over their contacts and communities. By operating on a decentralized network, the software lets users own their profiles, contacts, and group memberships without a central authority managing the data. The platform also includes a directory for discovering existing communities and tools for creating new ones.

Distinctive aspects include the absence of user IDs, the use of link/QR‑code based connections, and a roadmap that introduces community vouchers to fund sustainable, independent server operation. The desktop client is available for macOS and is considered stable, with security audits conducted in 2022 and 2024.