smallest.ai
Smallest.ai is a real-time voice AI platform for building enterprise voice agents and using its own audio models through an API. Its models include Lightning text-to-speech, Pulse speech-to-text in 38+ languages, the Hydra speech-to-speech model and the Electron small language model, alongside a no-code agent builder with campaigns and telephony.
Pros
- Low-latency text-to-speech and speech-to-text models
- speech-to-speech option
- unlimited agents on pay as you go
- $10 in free credits to start
- voice cloning
- ISO 27001, SOC 2 Type 2, GDPR and HIPAA compliance
Cons
- Per-minute cost depends on the models chosen and adds up across layers
- advanced campaigns and SMS not yet available on pay as you go
- HIPAA zero data retention is a $1,000/month add-on
Cost
Pay as you go with $10 in free credits: voice agents about $0.09–$0.21/minute depending on models, including a $0.01/minute hosting fee; phone numbers $10/month each; HIPAA zero data retention add-on $1,000/month. Enterprise: custom pricing (as low as $0.05/minute).
Verdict
A strong option for developers and enterprises building high-volume, low-latency voice agents or needing fast speech models through an API.
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