Retell AI
Low-latency AI voice agents, fast to deploy and reliable in production
Overview
Retell AI is often called the most serious Vapi alternative, with very low conversation latency and exemplary documentation. The platform delivers a clean dashboard for building inbound and outbound agents, managing conversation flows, call transfers, and CRM integrations. The $10 free credit on signup lets you trial without a card.
Real cost exceeds the advertised $0.07/min once LLM, voice synthesis, and phone are added (expect $0.13-$0.19/min depending on setup). French is supported through third-party STT/TTS engines, but the management interface is English only.
Our verdict
Best quality-to-performance ratio for SMBs with a developer or integrator. Free credit eases evaluation. Avoid if usage is very light; additional costs weigh on small volumes.