Deepgram

Deepgram provides developer APIs for transcribing recorded or live speech, generating speech, and building voice agents. Each job has a different cost shape: audio duration, model choice, language support, and whether an agent uses bundled or bring-your-own components can affect the bill. The official pricing page separates these services instead of offering a single all-purpose subscription. Developers should test noisy audio, overlapping speakers, accents, and latency with their own recordings. For a voice agent, measure the full conversation from microphone to spoken reply; a fast transcription result alone does not prove a responsive end-to-end experience.