Directory / Speech APIs (STT/TTS)
AssemblyAI
Speech AI models for transcription and audio understanding
Visit AssemblyAI ↗Who it's for
Developers, product teams, enterprises
Review: pros & cons
AssemblyAI offers speech-to-text and audio intelligence APIs, including streaming transcription for voice agents, speaker labels and summaries. Its pro is clear documentation and developer-friendly pricing. Limitation: it does not provide text-to-speech, so builders must pair it with a separate voice provider and orchestration framework to ship full conversational agents.