messages.dev

messages.dev is a managed messaging platform for developers building AI agents that communicate over iMessage, RCS, and SMS. Its REST API and TypeScript SDK let teams add messaging to agent products without operating carrier infrastructure themselves.

The platform is designed for production workflows that need real phone-based conversations instead of browser-only chat. Developers can start in a free sandbox, test integrations with familiar API primitives, and move to managed production lines when their product is ready. The current production plan is listed at $99 per line per month.

Useful applications include customer-support agents, appointment and lead follow-up, personal assistants, notification workflows, and products that need to reach users in their existing messaging apps. By combining multiple messaging channels behind a developer-focused interface, messages.dev gives AI product teams a practical route from prototype conversations to deployed communication agents while keeping the underlying messaging infrastructure managed. Teams keep a focused developer API while users receive messages in familiar channels.