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AI Transcription Tools Compared

9 transcription tools compared: Otter, Whisper API, Deepgram Nova-3, AssemblyAI, Rev, Sonix, Granola, Zoom AI, MacWhisper. Accuracy, languages, pricing.

Updated May 2026
ToolPricingAccuracyLanguagesLiveSpeakersBest for
Otter.aiFree + $17-30/mo92%37✓Auto-detectLive meeting transcription + summaries
Whisper API (OpenAI)$0.006/min95%99No (manual)Highest accuracy + bring-your-own UI
Deepgram Nova-3$0.0043-0.0085/min96%36✓YesProduction-grade speed + accuracy
AssemblyAI Universal-2$0.12-0.37/hr95%26✓YesAPI-first; sentiment + summarization built in
Rev.ai$0.02-0.25/min94%36+✓YesHuman-grade transcription via human option
Sonix$10-22/hr93%53+YesPay-per-use; team workspace
Granola$14-35/mo92%20+✓Auto-namedAI notebook with you typing alongside
Zoom AI CompanionFree with Zoom Pro90%20+✓YesTightest Zoom workflow
MacWhisper$15 one-time95%99NoPrivacy-first local Whisper on macOS
Accuracy is on standard test sets (LibriSpeech / TED-LIUM); your real-world numbers depend on audio quality, background noise, and accents. For production: pilot 2-3 candidates on YOUR audio for a week before committing.
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What it does

9 transcription tools: Otter, Whisper API, Deepgram Nova-3, AssemblyAI Universal-2, Rev, Sonix, Granola, Zoom AI Companion, MacWhisper. Compare accuracy (90-96%), languages, live vs async, pricing, speakers detection. Standard test sets vs your real audio differ — pilot 2-3 candidates on YOUR audio for a week before committing.

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How to use it

  1. Read the comparison table.
  2. Pick by accuracy + price + your platform need.

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