Python
WhisperX
Whisper plus word timestamps and diarization
by m-bain · BSD-2-Clause
Speech (STT / TTS)STT with alignmentBSD-2-ClauseRuns locallyPythonIntermediate
From the README
Install
pip install whisperx
- ⚡️ Batched inference for 70x realtime transcription using whisper large-v2
- 🪶 faster-whisper backend, requires
- 🎯 Accurate word-level timestamps using wav2vec2 alignment
- 👯♂️ Multispeaker ASR using speaker diarization from pyannote-audio (speaker ID labels)
- 🗣️ VAD preprocessing, reduces hallucination & batching with no WER degradation
Excerpts from the project README on GitHub. Copyright and licensing remain with the respective authors.
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🚀 Latest release ·
What is WhisperX?
WhisperX adds accurate word-level timestamps and speaker diarization on top of Whisper, ideal for subtitles and multi-speaker transcripts.
Why people choose WhisperX
- Accurate word-level timestamps
- Speaker diarization built in
- Great for subtitles and meeting transcripts
WhisperX at a glance
| Category | Speech (STT / TTS) |
| Type | STT with alignment |
| License | BSD-2-Clause |
| Runs locally | Yes |
| Built with | Python |
| Skill level | Intermediate |
| Best for | subtitles and multi-speaker transcripts |
Latest releases
Open-source alternatives to WhisperX
Other open-source speech (stt / tts) tools worth comparing:
WhisperOpenAI's open speech-to-text baseline
faster-whisperWhisper, much faster and lighter
PiperFast, local neural text-to-speech
Coqui TTSDeep-learning TTS with voice cloning
BarkText-to-audio with voices and effects
F5-TTSZero-shot voice cloning that actually convinces
KokoroTiny 82M TTS with astonishing quality
whisper.cppWhisper in pure C/C++, runs anywhere
OpenVoiceClone a voice and control its emotion
StyleTTS 2Human-level speech synthesis
pyannote.audioKnow who spoke when
Silero VADDetect speech in audio, instantlyWhisperX head-to-head
WhisperX vs WhisperWhisperX vs faster-whisperWhisperX vs PiperWhisperX vs Coqui TTSWhisperX vs BarkWhisperX vs F5-TTSWhisperX vs KokoroWhisperX vs VozoWhisperX vs whisper.cppWhisperX vs OpenVoiceWhisperX vs StyleTTS 2WhisperX vs pyannote.audioWhisperX vs Silero VADWhisperX vs NeumeWhisperX vs unWarpWhisperX vs Yap
FAQ
Is WhisperX free?
WhisperX is free and open-source (BSD-2-Clause license), so you can use, self-host and modify it at no cost.
Can I run WhisperX locally?
Yes. WhisperX is designed to run on your own machine or server, keeping your data private.
What is the best alternative to WhisperX?
Popular open-source alternatives include Whisper, faster-whisper, Piper. See the comparisons above to choose.
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