Agents that answer and make phone calls, with a dashboard for the transcripts. Built by Retell.
Others in voice
Common questions
Is Retell AI free to use?
Retell AI is open source and free to run yourself. You still pay whichever model provider you point it at, and this tutorial is free with no signup.
Do I need to know Python to use Retell AI?
Basic Python is enough. Functions, dictionaries and imports cover most of what Retell AI asks of you.
When should I not use Retell AI?
When something else in voice fits the job better. The others in that group are listed below.
Lessons for Retell AI are being written. Meanwhile the APIs for AI tutorial covers the same ground: state, tools, loops, memory and human approval. Most of it carries straight over.
Start the APIs for AI tutorial →