Freemium
Amazon Polly
Text to Speech
AWS cloud TTS service with lifelike neural voices at scale
AWS's mature neural TTS service, pay-as-you-go and easy to embed into products.
Text to SpeechAI APIs
Overview
KIMI（Moonshot api） is an AI APIs tool listed in our directory. See the official site for current features and pricing.
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Freemium
AssemblyAI
Speech Recognition
Speech-to-text API with built-in summarization and insights
ASR API that goes beyond transcription with summaries, diarization and moderation.
Speech RecognitionAI APIs
Freemium
Cartesia
Text to Speech
Ultra-low-latency Sonic TTS API built for real-time voice agents
Sonic is a state-space TTS model with millisecond latency for real-time voice agents.
Text to SpeechAI APIs
Freemium
Deepgram
Speech Recognition
Fast, developer-favorite speech-to-text API for voice apps
A fast, accurate speech-to-text API with strong streaming support, popular for voice apps.
Speech RecognitionAI APIs