HAIL.SO / DISPATCH · 2026-07-12 · COMPARE
FILE: COMPARE · 6 of 6 slots

side by side.

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02

Speech to text

4 models
AssemblyAI
Whisper-Streaming
×
Speechmatics
Speechmatics Enhanced
×
Soniox
Soniox STT Async v4
×
Rev.ai
Rev.ai Reverb
×
$/min$0.005000$0.002150$0.001670$0.003300
$/min batch
Streaming
Realtime
Languages99+56+60+en
Diarizationextra-costincludedincludedincluded
TTFW
Verified2026-07-022026-07-022026-07-022026-07-02
Sourceprovider page ↗provider page ↗provider page ↗provider page ↗
03

Text to speech

2 models
Smallest.ai
Lightning v3.1
×
Cartesia
Sonic 2
×
$/1M chars$17.50$50.00
Voice qualityneuralneural
Voice cloning✓ included✓ included
Voice count217
Languagesen, hi, es, mr, kn, ta, bn, gu, te, ml, pa, oren, fr, de, es, pt, zh, ja, ko
SSML support
TTFB200ms90ms
Output formatspcm, mp3, wav, ulaw, alaw
Verified2026-07-022026-07-02
Sourceprovider page ↗provider page ↗