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OpenAI Whisper

Robust speech recognition you can run anywhere

Toolora score93Open source

Free / open source

AssemblyAI

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

Toolora score87Free tier

Free tier

llama.cpp

Run LLMs locally with pure C/C++

Toolora score97Open source

Free / open source

SpecOpenAI WhisperAssemblyAIllama.cpp
CategoryAI ToolsAI ToolsAI Tools
PricingFree / open sourceFree tier + paid usage by audio hourFree / open source
Toolora score93/10087/10097/100
Best forgithub, speech, transcription, audiospeech, transcription, voice, apigithub, local-llm, open-source, inference
Top features
  • ·Multilingual ASR
  • ·Speech translation to English
  • ·Multiple model sizes
  • ·Speech-to-text
  • ·Real-time streaming
  • ·Voice Agent API
  • ·CPU and GPU backends
  • ·GGUF model format
  • ·Quantisation support