Libri-Light
60k hours of unlabeled English audiobook audio for self-supervised pretraining.
Drop your audio. Transcript in seconds. First transcript free, then $4 = 300 min
Upstream is archived. Libri-Light’s repository has been set read-only by its owner, so there are no further releases, fixes, or security patches. The last commit landed 2023-07-11. It can still be cloned and run, and forks may be maintained elsewhere. See the repository.
Best for self-supervised pretraining (wav2vec 2.0, HuBERT) and limited-supervision benchmarks (10min / 1h / 10h splits). Pricing: free.
What it is
Libri-Light packages ~60,000 hours of unlabeled LibriVox audio plus a limited-supervision evaluation suite (10min / 1h / 10h labeled splits). The standard pretraining corpus for English self-supervised speech models. License: CC BY 4.0.
Watch out for: CC BY 4.0 · derived from LibriVox public-domain audiobooks · English-only · read speech bias · 60k hours of audio is ~7 TB. Cite: Kahn et al., ICASSP 2020.
Install / use
Features
| Speaker diarization | No |
| Word-level timestamps | No |
| Streaming / real-time | No |
| Languages supported | 1 |
| HIPAA eligible | No |
Links
Libri-Light vs Whipscribe
| Feature | Libri-Light | Whipscribe |
|---|---|---|
| Category | Open source | Transcription APIs |
| Pricing | free | $4–$24 one-time packs (credits never expire) · $2 single unlock · 60 min free on signup |
| Speaker diarization | No | Yes |
| Word timestamps | No | Yes |
| Streaming | No | No |
| Languages | 1 | 99 |
| Platforms | GitHub, OpenSLR | Web, API, MCP |
Alternatives to Libri-Light
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