Seamless (SeamlessM4T family)

by Meta AI

Meta's multilingual speech-translation + transcription foundation suite.

Looking at Seamless (SeamlessM4T family)? Try this first.

Drop your audio. Transcript in seconds. First transcript free, then $4 = 300 min

TL;DR

Best for open multilingual S2ST / S2TT research and 100+ language transcription. Pricing: free.

Category
Open source
License
NOASSERTION
Stars
★ 11.8k
Last push
2026-07-28
Pricing
free
Platforms
Linux, Docker

What it is

Includes SeamlessM4T v2, SeamlessExpressive, SeamlessStreaming, and the underlying w2v-BERT 2.0 encoder. Apache-2.0 code, CC-BY-NC weights.

Best for: Open multilingual S2ST / S2TT research and 100+ language transcription.
Watch out for: CC-BY-NC-4.0 — non-commercial; check Meta's model license before shipping.

Install / use

pip install fairseq2

Features

Speaker diarizationNo
Word-level timestampsYes
Streaming / real-timeNo
Languages supported101
HIPAA eligibleNo

Links

GitHub repo ↗

Seamless (SeamlessM4T family) vs Whipscribe

FeatureSeamless (SeamlessM4T family)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
Languages10199
PlatformsLinux, DockerWeb, API, MCP

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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.