Deepgram

Speech-to-text, text-to-speech and voice agent APIs built for real-time phone conversations.

Deepgram supplies the speech recognition and speech synthesis that many voice agents run on, plus a Voice Agent API that combines them into one real-time conversation. Its models are tuned for low latency and phone audio. Pricing is pay as you go per minute with a free starting credit, and annual pre-paid plans lower the rate.