Deepgram

Deepgram provides voice AI infrastructure for converting speech to text, text to speech, and orchestrating full voice agents through unified APIs, serving developers, startups, enterprises, and contact centers including Twilio, Cloudflare, IBM, and Daily. Flux STT is a speech-to-text model that understands turn-taking, handles interruptions, and carries conversational context; Flux TTS is a text-to-speech model built for live conversations that 'thinks before it speaks'; and the Voice Agent API unifies STT, TTS, and LLM capabilities into a single orchestration layer. Deepgram supports both real-time and batch processing, with cloud and self-hosted deployment options. A free tier is available offering up to 45 concurrent streaming connections globally (5 in EU/AU), with additional developer, platform partner, and custom enterprise pricing tiers.