2 models compared on the same benchmark — accuracy, latency, price, language coverage and capabilities. Soniox STT (Async) leads on raw accuracy; Rev AI Reverb is fastest; Soniox STT (Async) covers the most languages; Soniox STT (Async) is cheapest.
Verdict · who wins what
Most accurate
Soniox STT (Async)
8.7% WER
Soniox
Fastest
Rev AI Reverb
0.2× realtime
Rev AI
Most languages
Soniox STT (Async)
25 languages
Soniox
Cheapest
Soniox STT (Async)
$0.0017/min
Soniox
Comparing
2 models · same benchmark
1
Rev AI Reverb
Rev AI
Rev AI Reverb — async speech-to-text built on Rev's Reverb ASR model (trained on 3M+ hours of human-transcribed audio), with speaker diarization for up to 8 speakers and word-level timestamps. English-core with broad language support via the async API.
2
Soniox STT (Async)
Soniox
Soniox async batch transcription — one multilingual model across 60+ languages with speaker diarization, per-word timestamps, and automatic language identification, at a low flat token-based rate.
Rev AI Reverb
Soniox STT (Async)
field · 33 models
lower-left is better
general
legal
medical
noisy
technical
uk
us
Latency p99
13.9s
6.2s
$10.08
1,000 hours
$180.00
$100.80
No
Auto-detect language
No
Yes
Live / streaming
No
No
Custom vocabulary
No
No
Max file size
No limit
No limit
Max duration
17 h
5 h
Compliance
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Is Rev AI Reverb or Soniox STT (Async) more accurate?
Soniox STT (Async) is more accurate, with a 8.7% word error rate versus 18.2% for Rev AI Reverb, on our standardized benchmark.
Which is cheaper, Rev AI Reverb or Soniox STT (Async)?
Soniox STT (Async) is cheaper at $0.0017/min versus $0.0030/min for Rev AI Reverb.
Should you choose Rev AI Reverb or Soniox STT (Async)?
Choose Rev AI Reverb for speed; choose Soniox STT (Async) for accuracy, lower cost, and language coverage.
