RWTH i6

by RWTH Aachen University

RWTH Aachen i6 group — RASR toolkit + IWSLT speech translation history.

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TL;DR

Best for statistical machine translation + ASR theoretical research. Pricing: free.

What it is

RWTH i6 (Hermann Ney group) built RASR + RETURNN, won multiple IWSLT speech-translation tracks, and is the historical home of statistical-MT research.

Best for: Statistical machine translation + ASR theoretical research.
Watch out for: RASR toolkit license is non-commercial.

Install / use

Go to RWTH i6 www-i6.informatik.rwth-aachen.de

Features

Speaker diarization	No
Word-level timestamps	No
Streaming / real-time	No
Languages supported	0
HIPAA eligible	No

RWTH i6 vs Whipscribe

Feature	RWTH i6	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	0	99
Platforms	Web	Web, API, MCP

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