Smallest.ai vs Vapi
A side-by-side comparison of Smallest.ai and Vapi, two Voice tools, drawn from Ignaite's continuously-verified listings.
Compared from listings verified as of
At a glance
The honest brief
Smallest.ai
Bets on small, fast models — claims ~100ms to generate 10s of speech — to undercut the latency and cost of larger voice stacks.
- Very low TTS latency
- TTS + voice agents in one platform
- 30+ languages incl. Indian langs
- Cost-focused small models
- Younger, smaller company
- Enterprise/developer-oriented
- English + select langs strongest
Vapi
Solves the hard parts of phone agents — telephony, low-latency turn-taking and barge-in — while leaving STT/LLM/TTS fully pluggable.
- Telephony and interrupts handled
- Pluggable STT + LLM + TTS stack
- Fast to a working phone agent
- Generous developer free tier
- Per-minute costs stack across layers
- Latency depends on chosen models
- Complex configuration surface
- Cloud-only orchestration