AI Voice / Review
Hume AI
Hume AI builds emotionally expressive voice models, the Octave TTS engine and the EVI empathic speech-to-speech interface, delivered via API and subscription tiers.
$100
Cost / 1M chars
$3/mo
From
No
Free tier
Tiered subscriptions (free, then $3/month up to $500/month) bundle monthly characters with overage of $0.05-$0.15 per 1,000 characters, so effective Octave TTS cost runs roughly $50-$120 per million characters. Its differentiator is emotionally aware, expressive voices plus a low-latency empathic conversational interface (EVI) billed per minute for speech-to-speech.
Developers building emotionally expressive or empathic conversational voice agents.
Strengths
- +Best-in-class emotional/expressive prosody
- +Empathic real-time voice interface (EVI)
- +Unlimited voice cloning on paid tiers
- +Commercial license on all plans
Trade-offs
- –More expensive per character than budget TTS APIs
- –Confusing multi-tier pricing with overages
- –Fewer languages than mainstream TTS
Hume AI at a glance
- Languages
- 11+ (Octave)
- Voice cloning
- Yes (unlimited)
- API
- Yes
- Commercial use
- Yes
- Styles/emotions
- Yes (core strength)
- Output
- MP3/WAV/PCM stream