Comparison
Speaker Diarization Technology
What it does, and how to check it yourself.
Speaker diarization works in three steps. It finds the parts with speech, turns each part into a numeric voice pattern, and clusters similar patterns into speakers. Newer systems use neural networks for these steps.
Checked November 2026 on each tool's own site. We ran no tests of our own.
Does diarization need to know how many people spoke?
No, but some APIs let you set the number. Set it only when you know it, because AssemblyAI warns that a wrong count can hurt results.