wav2letter++

by Meta AI

Meta's original fast convolutional ASR system.

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TL;DR

Best for historical reference for convolutional ASR. Pricing: free.

Category
Open source
License
NOASSERTION
Stars
★ 6.4k
Last push
2026-07-14
Pricing
free
Platforms
Linux

What it is

The wav2letter++ research codebase. BSD-3-Clause.

Best for: Historical reference for convolutional ASR.
Watch out for: Archived; new work in fairseq / SeamlessM4T.

Install / use

git clone https://github.com/flashlight/wav2letter

Features

Speaker diarizationNo
Word-level timestampsYes
Streaming / real-timeNo
Languages supported20
HIPAA eligibleNo

Links

GitHub repo ↗

wav2letter++ vs Whipscribe

Featurewav2letter++Whipscribe
CategoryOpen sourceTranscription APIs
Pricingfree$4–$24 one-time packs (credits never expire) · $2 single unlock · 60 min free on signup
Speaker diarizationNoYes
Word timestampsYesYes
StreamingNoNo
Languages2099
PlatformsLinuxWeb, API, MCP

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