SimpleX Chat is a private, open-source messaging application and network designed to operate without assigning user identifiers, ensuring complete communication privacy.

The main features and capabilities of SimpleX Chat include:

• No User Identifiers: Operates as a messaging network without assigning any user IDs—not even random numbers or handles—so servers cannot determine who is communicating with whom.

• Decentralized & Local Data Control: Stores contacts, secret groups, and channels locally on the user's device rather than in a server database, allowing anyone to host their own SMP servers, XFTP servers, or chat relays.

• Traffic Privacy & Noise Encryption: Delivers messages privately where all data traffic appears as random noise to servers.

• Multi-Feature Communication Suite: Supports text messaging, media sharing, secret groups, public channels, chat profiles, audio and video calls via WebRTC, notifications, and linked devices.

• Developer & Power-User Tooling: Provides open-source protocols (SMP protocol and SimpleXMQ), a Terminal CLI, a TypeScript SDK, and a bot API for custom integrations.

• Security Audited & Community-Funded: Supported by independent security audits (2022 and 2024), over 3 million downloads, and equity crowdfunding directly from its user base.