AssemblyAI→1 open-source option

Open-source AssemblyAI alternatives

Speech-to-text and audio intelligence API for transcription, diarization, and summaries. Below are curated open-source options listed on OpenElse, with notes on when each is a better fit.

Official site: www.assemblyai.com

FluidAudio

Local audio AI SDK for Apple devices covering speech-to-text, TTS, VAD, and speaker diarization.

Self-hostable