HAIL.SO / DISPATCH · 2026-07-22 · COMPARE
FILE: COMPARE · 6 of 6 slots

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02

Speech to text

3 models
OpenAI
Whisper
×
Speechmatics
Speechmatics Enhanced
×
AssemblyAI
Universal-Streaming
×
$/min$0.006000$0.002150$0.002500
$/min batch
Streaming
Realtime
Languages99+56+en
Diarizationunsupportedincludedextra-cost
TTFW
Verified2026-07-192026-07-192026-07-19
Sourceprovider page ↗provider page ↗provider page ↗
03

Text to speech

3 models
OpenAI
TTS-1
×
Smallest.ai
Lightning v3.1
×
Cartesia
Sonic Turbo
×
$/1M chars$15.00$17.50$50.00
Voice qualityneuralneuralneural
Voice cloning✓ included✓ included
Voice count217
Languagesenen, hi, es, mr, kn, ta, bn, gu, te, ml, pa, oren, fr, de, es, pt, zh, ja, hi, ko
SSML support
TTFB200ms40ms
Output formatspcm, mp3, wav, ulaw, alaw
Verified2026-07-192026-07-192026-07-19
Sourceprovider page ↗provider page ↗provider page ↗