2 models compared on the same benchmark — accuracy, latency, price, language coverage and capabilities. Soniox STT (Async) leads on raw accuracy; Speechmatics Enhanced is fastest; Speechmatics Enhanced covers the most languages; Soniox STT (Async) is cheapest.
Verdict · who wins what
Most accurate
Soniox STT (Async)
8.7% WER
Soniox
Fastest
Speechmatics Enhanced
0.3× realtime
Speechmatics
Most languages
Speechmatics Enhanced
48 languages
Speechmatics
Cheapest
Soniox STT (Async)
$0.0017/min
Soniox
Comparing
2 models · same benchmark
1
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.
2
Speechmatics Enhanced
Speechmatics
Highest accuracy model — 55+ languages, best-in-class
Speechmatics Enhanced
Soniox STT (Async)
field · 33 models
lower-left is better
general
legal
medical
noisy
technical
uk
us
Latency p99
6.2s
12.1s
$10.08
$49.68
1,000 hours
$100.80
$496.80
Yes
Auto-detect language
Yes
Yes
Live / streaming
No
No
Custom vocabulary
No
Yes
Max file size
No limit
1 GB
Max duration
5 h
No limit
Compliance
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Is Soniox STT (Async) or Speechmatics Enhanced more accurate?
Soniox STT (Async) is more accurate, with a 8.7% word error rate versus 12.3% for Speechmatics Enhanced, on our standardized benchmark.
Which is cheaper, Soniox STT (Async) or Speechmatics Enhanced?
Soniox STT (Async) is cheaper at $0.0017/min versus $0.0083/min for Speechmatics Enhanced.
Should you choose Soniox STT (Async) or Speechmatics Enhanced?
Choose Soniox STT (Async) for accuracy and lower cost; choose Speechmatics Enhanced for speed and language coverage.
