Deepgram

Deepgram is a voice AI platform built around its proprietary Nova-3 speech recognition model, which the company positions as the fastest and most accurate transcription engine available via API. Beyond raw speech-to-text, Deepgram offers text-to-speech (Aura voices), real-time streaming transcription, and audio intelligence features like sentiment analysis, topic detection, and summarization. The platform is designed for developers who need to embed voice capabilities into products — call center analytics, meeting transcription, podcast indexing, and voice-enabled agents — without managing models themselves. Deepgram's API-first approach means everything is accessible through REST and WebSocket endpoints, with per-second billing and a pay-as-you-go tier that includes free credits. For higher-volume users, committed-use plans reduce per-minute costs and add dedicated support. The company also offers custom model training for enterprises with domain-specific vocabulary or accent requirements. Compared to general-purpose LLM voice offerings, Deepgram's focus on low-latency, high-throughput transcription makes it a common choice for production voice agents and real-time analytics pipelines where speed and accuracy at scale matter more than conversational flexibility.