wav2letter++

by Meta AI

Meta's original fast convolutional ASR system.

TL;DR

Meta's original fast convolutional ASR system.

Best for historical reference for convolutional ASR.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

Category
Open source
License
—
Stars
—
Last push
—
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Best for: Historical reference for convolutional ASR.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

wav2letter++ vs Whipscribe

Featurewav2letter++Whipscribe
CategoryOpen sourceTranscription APIs
Pricingfreefree beta
Speaker diarizationNoYes
Word timestampsYesYes
StreamingNoNo
Languages2099
PlatformsLinuxWeb, API, MCP

Alternatives to wav2letter++

OpenAI Whisper
OpenAI

The reference open-source multilingual ASR model from OpenAI.

OSS · MIT ★ 98.1k
whisper.cpp
Georgi Gerganov

C/C++ port of Whisper — runs on anything, from a Raspberry Pi to Apple Silicon.

OSS · MIT ★ 48.8k
faster-whisper
SYSTRAN

4× faster than reference Whisper using CTranslate2 — production sweet spot.

OSS · MIT ★ 22.3k

Whipscribe is a managed faster-whisper + whisperX service. If you want transcripts without running infrastructure, paste a URL or drop a file in the form below — you'll have a transcript in seconds.