OpenClaw is a self-hosted AI agent that connects to messaging platforms - Telegram, Discord, and WhatsApp - rather than living in its own separate web app. See OpenClaw messaging channels for how the connection to each platform works.
OpenClaw is one of the newer additions to the App Store; a fuller feature writeup is on the way. It gets a private access path like every app in the catalog, though unlike most of them it authenticates via its own gateway token rather than single sign-on - see Installing OpenClaw.
See Installing OpenClaw for the setup walkthrough.