Retell AI

What it does

Retell AI provides an API and dashboard for building low-latency voice agents that can be plugged into inbound or outbound call flows. Teams choose their own LLM and telephony provider, which gives more flexibility than all-in-one platforms but means total cost depends on which components are stacked together. Every account gets 20 concurrent calls included, with additional concurrency at $8/call/month, and an Enterprise plan starting around $8,000 that adds managed setup and dedicated support.

Who this helps

You're building low-latency voice agents for inbound or outbound calls.

You want to choose your own LLM and telephony provider.

You expect concurrent call volume that needs to scale.

You want an API and dashboard rather than a no-code builder.