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Welcome to Simli
The API devs use to add faces to realtime AI agents

The Simli speech-to-video API lets developers create lip-synced AI avatar interactions. With visual AI avatars, you can create anything! Mock interviews, sales assistants, language learning, coaching, customer-service training, historical characters, and so much more. Ready to make your first one?
Use Simli Widget
Embed a Simli Agent on your website in a few minutes.
Use Simli Auto (new models)
Recommended if you want the best visual quality and ease of use.
Use Simli Compose (old models)
Recommended if you need full-control of your tech stack (e.g., custom voice bots). Note: Currently supports our old lipsync-based models. Will support the new Trinity models soon.
Join our community
Share your projects, get technical help, and stay up-to-date with the latest features.