Voice agents that set a new frontier.

Voice agents that run on Cartesia as one managed system, built on best-in-class speech models. Cartesia handles listening, turn-taking, interruptions, tool calls and knowledge retrieval, and an AI model you choose decides each reply.

Yes. One API request names the agent, the number to call from, and the numbers to call. The single-call endpoint dials immediately and rejects numbers beyond how many calls your account can run at once; for larger lists, batch calling queues up to 5,000 numbers and dials them as capacity frees up. For outbound sales, see AI cold calling.

Yes. Assign a phone number to an agent in the Playground or through the Phone Numbers API, and inbound calls on that number route to the agent. A number serves one agent at a time, and an agent can hold several numbers, so a support line and a sales line can share one agent or split across two.

Yes. Put the agent on a Cartesia number, or connect your own phone provider, Twilio or a SIP trunk, and route the numbers you already have to it.

Agents run at $0.03 per minute. Calls on a Cartesia phone number add $0.014 per minute. The rate is the same for every agent.

You pick the model when you set up each agent, from the list Cartesia offers, and you can change it at any time.

Place a test call from your browser, then score it with metrics you write. Every call keeps its recording, transcript and summary, so you can review exactly what happened.

Yes, if you follow the laws that cover your calls. In the US that includes the Telephone Consumer Protection Act (TCPA): get consent before you call people, honor opt-outs, and check the rules for your industry and jurisdiction. Cartesia's Acceptable Use Policy sets what the platform allows. This answer is not legal advice.