Vapi vs Retell AI (2026): voice agent platforms compared
Both are developer/infrastructure platforms for building voice agents, priced per minute, where the headline rate is only the platform fee and your real cost is the assembled stack. They're close competitors; the choice comes down to flexibility vs transparency.
Updated June 2026 · independent comparison
| Vapi | Retell AI | |
|---|---|---|
| Channel | voice | voice |
| Billing | per-minute | per-minute |
| Entry price | Free start (60+ min/mo); usage-based | $0 PAYG ($10 free credits) |
| AI rate | $0.05/min platform fee only (STT/LLM/TTS/telephony extra) | $0.07/min platform; $0.07–$0.31/min all-in |
| Free tier | Yes — 60+ free minutes/mo, 10 concurrent calls | Yes — $10 credits, 20 concurrent calls |
Pick Vapi
Pick Vapi if you want maximum model/stack flexibility and bring-your-own-keys (no markup), and you're comfortable assembling and paying the providers yourself.
Vapi profilePick Retell AI
Pick Retell AI if you want the most transparent per-component pricing, free US telephony, and a recurring affiliate-friendly platform — a strong middle ground for integrators.
Retell AI profileThe verdict
Both land around $0.07–$0.31/min all-in depending on your stack. Choose Vapi for ultimate flexibility, Retell for transparency and a slightly more guided path. Either way, budget the full stack — not the $0.05–$0.07 headline.
Frequently asked questions
Is Vapi or Retell cheaper?
Their platform fees are close — Vapi $0.05/min, Retell $0.07/min — and both pass through STT, LLM, TTS and telephony, so all-in cost ($0.07–$0.31/min) depends mostly on your chosen models and add-ons, not the headline rate. Vapi's bring-your-own-keys can lower cost if you have existing API deals.
Which is better for a non-technical user, Vapi or Retell?
Neither — both are developer platforms that assume you'll build and assemble the agent. A non-technical SMB should use a done-for-you receptionist (Goodcall, Thoughtly, Smith.ai) instead, where the per-minute stack is hidden behind a flat fee.