Voice & Speech

whisperX

Automatic Speech Recognition with Word-level Timestamps and Diarization

Status
Generally available
Last checked
Checked · Oct 16, 2026
License
Open source
Pricing
Free tier · from $0
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What it is

WhisperX is an advanced Automatic Speech Recognition library that provides word-level timestamps and speaker diarization, making it ideal for detailed audio analysis in various applications.

WhisperX stands out with its ability to provide both word-level timestamps and speaker diarization, making it uniquely suited for applications requiring detailed audio analysis.

When it fits — and when it doesn’t

A good fit for

  • Developers working on projects that require detailed transcription and speaker differentiation in audio files

  • Content creators who need automated captioning for their videos with accurate timestamps

  • Research teams analyzing speech patterns or conducting voice-based studies

Look elsewhere if

  • Projects requiring real-time processing of live streams due to its batch-processing nature

  • Applications that require extremely low latency in response time, as WhisperX is optimized for accuracy over speed

Known weaknesses

Each one links to the public issue, changelog or docs page it came from, where we have one.

  1. 01

    Limited language support beyond Python

    Primary development and maintenance focus on Python with no official support for other languages

  2. 02

    Performance issues with large audio files

    Processing times increase exponentially with file size, causing delays in analysis

  3. 03

    Small and less active community

    GitHub activity shows low number of contributors and infrequent updates to documentation and examples

What it does well

  • Word-level timestamps for precise audio analysis

  • Speaker diarization to identify different speakers in an audio file

  • High accuracy in speech recognition tasks

  • Open-source and community-driven development

Pricing

Free tier
YesOpen source — free to use
Paid from
$0
Model
Flat rate
Enterprise plan
No

Pricing not independently confirmed — check the vendor’s page.

Performance benchmarks

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Setup steps, common gotchas and what to check after 30 days.

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