Comparison
Speaker Diarization Accuracy
What it does, and how to check it yourself.
Speaker diarization accuracy is usually reported as the diarization error rate, or DER: the share of a recording's time given to the wrong speaker, missed, or marked as speech when no one spoke. Lower is better.
Checked November 2026 on each tool's own site. We ran no tests of our own.
Can I compare DER figures between vendors?
Only when they come from the same audio and the same scoring rules. Vendors usually test on their own choice of recordings.