Phonic vs Retell AI
A side-by-side comparison of Phonic and Retell AI, two Voice tools, drawn from Ignaite's continuously-verified listings.
Compared from listings verified as of
At a glance
The honest brief
Phonic
Runs one proprietary speech-to-speech model at sub-300ms latency instead of an STT→LLM→TTS chain, with eval and observability built in for voice agents.
- Reliable tool calling for voice agents
- Natural turn-taking, low latency
- Built-in eval and observability
- Self-host / containerized option
- Enterprise-focused, no public free tier
- Pricing not published
- Younger than larger voice platforms
Retell AI
Bring your own LLM behind the voice agent, so it isn't locked to a single model like most all-in-one voice platforms.
- Inbound and outbound call handling
- SIP/Twilio telephony built in
- Low-latency turn-taking model
- No-code builder plus API
- Per-minute costs stack with LLM/TTS
- Voice quality depends on chosen vendors
- Cloud-only, no self-host