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featured

AssemblyAI

Speech-to-text and voice-agent APIs that transcribe audio and pull structured insights from speech

4.6
Free tier
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Free tier

verified

OpenAI Whisper

Robust speech recognition you can run anywhere

4.7
Open source
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Free / open source

featured

Deepgram

Speech-to-text, text-to-speech, and a voice-agent API for live conversations, in the cloud or self-hosted

4.6
Free
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Free trial

SpecAssemblyAIOpenAI WhisperDeepgram
CategoryAI ToolsAI ToolsAI Tools
PricingFree tier + paid usage by audio hourFree / open sourceFree trial + paid usage; Flux TTS promo windows
Rating4.6 (890)4.7 (8,900)4.6 (720)
Community87/10093/10087/100
Tierfeaturedverifiedfeatured
Best forspeech, transcription, voice, apigithub, speech, transcription, audiospeech, stt, tts, voice-agents
Top features
  • ·Speech-to-text
  • ·Real-time streaming
  • ·Voice Agent API
  • ·Multilingual ASR
  • ·Speech translation to English
  • ·Multiple model sizes
  • ·Speech-to-text
  • ·Text-to-speech
  • ·Voice Agent API