[voiper1]

They have their own ASR Conformer-2[0] and support 9 languages (they count it as 12)[1]

It looks like their synchronous transcribe is much slower than whisper, but if you need it fast, you need their realtime ASR (or amazon or google's).

[0] Conformer-2 is trained on 1.1M hours of English https://www.assemblyai.com/blog/conformer-2/ [1] https://www.assemblyai.com/docs/Concepts/supported_languages