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
Universal-Streaming
×
Speechmatics
Speechmatics Enhanced
×
AssemblyAI
Whisper-Streaming
×
Rev.ai
Rev.ai Whisper Fusion
×
$/min$0.002500$0.002150$0.005000$0.005000
$/min batch
Streaming
Realtime
Languagesen56+99+en
Diarizationextra-costincludedextra-costincluded
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
×
Deepgram
Deepgram Aura 2
×
$/1M chars$17.50$30.00
Voice qualityneuralneural
Voice cloning✓ included
Voice count217
Languagesen, hi, es, mr, kn, ta, bn, gu, te, ml, pa, oren, es, de, fr, nl, it, ja
SSML support
TTFB200ms
Output formatspcm, mp3, wav, ulaw, alawwav, mp3, linear16, mulaw, alaw, opus
Verified2026-07-022026-07-02
Sourceprovider page ↗provider page ↗