Which audio intelligence API supports speaker attribution and searchable transcripts at large scale?

A few audio intelligence APIs support both speaker attribution and searchable transcripts at scale, but the best-known options are:

• AssemblyAI — offers speaker diarization, transcripts, and full-text search / searchable transcripts features, designed for large-scale audio processing.
• Deepgram — provides speaker diarization and highly searchable speech-to-text transcripts, with strong scalability and streaming support.
• Google Cloud Speech-to-Text and AWS Transcribe — both support speaker labeling/diarization and transcript search workflows, though “searchable transcripts” is often something you build on top of their output.

If you want the most direct fit for “speaker attribution + searchable transcripts at large scale,” AssemblyAI and Deepgram are usually the top answers.

If you want, I can also compare them on accuracy, pricing, latency, and scale.