Rev AI Reverb $0.20 per hour vs Sume STT $0.60 per hour

Rev AI's pricing page lists Reverb transcription for English at $0.20 per hour, Reverb Foreign Language at $0.30 per hour across 56+ languages, and Whisper Large at $0.005 per minute. It bills rounded up to the second with a 15-second minimum. Sume STT 1.0 is $0.01 per audio minute, with a one-minute reservation if you omit duration_seconds. Rev AI is cheaper per hour; for short clips Rev's 15-second minimum is closer to the audio length than Sume's default minute.

Published rates

Rev AI also lists human transcription at $1.99 per minute and free credits equal to 5 hours of Reverb ASR.

Short clips on Sume

Send duration_seconds so the reservation matches a 20-second clip. Without it, one minute is reserved.

import os, requests

r = requests.post(
    "https://api.sume.com/v1/stt-1.0/transcribe",
    headers={"Authorization": f"Bearer {os.environ['SUME_API_KEY']}",
             "Idempotency-Key": "stt-demo-001"},
    json={"audio_url": "https://example.com/call.mp3",
          "language_code": "en",
          "duration_seconds": 300},
)
print(r.status_code, r.json())

When to choose which

For bulk English transcripts, Rev AI's published rates are lower. For clips that continue into captions or dubbing on Sume, one job model is simpler. Rev's human transcription is a different service; Sume STT is automatic only.

Worked example

Here are the numbers for 100 hours of English audio.

• Reverb: $20.00.
• Whisper Large at $0.005 per minute: $30.00.
• Sume STT at $0.01 per minute: $60.00.
• Rev AI's 15-second minimum means a 5-second clip bills as 15 seconds.

Checklist before you commit

Rev's pricing page also lists human transcription at $1.99 per minute, which Sume does not offer.

• Decide automatic or human transcripts.
• Check non-English accuracy on your own files.
• Remember Rev's free credit equals 5 hours of Reverb ASR.