Vapi vs Retell AI
Which voice AI platform should you use? An honest comparison from a team that builds with both, updated October 2026.
Short answer. Choose Vapi if you want maximum flexibility and control, with a developer friendly API and freedom to pick your own models and voices. Choose Retell AI if you want a faster path to a natural sounding phone agent with a friendlier visual builder and strong out of the box call handling.
Vapi vs Retell AI at a glance.
The differences that matter most when choosing.
| Vapi | Retell AI | |
|---|---|---|
| Best for | Developers and teams building custom voice products and complex call flows | Businesses that want a reliable AI receptionist or call agent live quickly |
| Setup | API first with a dashboard; most power is in code and tools | Visual agent builder plus API; easier for non developers |
| Models and voices | Bring your own LLM, speech to text and voice providers | Choice of leading models and voices, more opinionated defaults |
| Pricing model | Per minute platform fee plus the cost of the providers you choose | Per minute pricing that bundles most components |
| Integrations | Very flexible through tools, webhooks and custom functions | Built in calendar booking, call transfer and webhooks |
| Phone numbers | Import or buy numbers, works with Twilio and SIP | Buy or import numbers, works with Twilio and SIP |
Features and pricing change often. Check each vendor's website for current plans.
Which one should you choose?
It depends on your team, budget and goals.
Pick Vapi if
You have developers, need custom logic, want to fine tune latency and costs by choosing each provider, or are building a voice product for many clients.
Pick Retell AI if
You want an AI receptionist answering calls and booking appointments soon, prefer a visual builder, and value predictable per minute costs.
Not sure? We set up and run both. See how we can help or compare other tools on our comparisons page.
Common questions.
Quick answers before you decide.
Is Vapi or Retell cheaper?
It depends on volume and the providers you choose. Vapi charges a platform fee and you pay providers separately, which can be cheaper when tuned. Retell bundles more into one per minute rate, which is simpler to predict. Always check current pricing.
Can an AI voice agent book appointments?
Yes. Both platforms can check your calendar, book, reschedule and send confirmations, and transfer to a person when needed.
Do AI voice agents work for Canadian businesses?
Yes, including English and French. Tell callers they are speaking with an AI and follow privacy rules for call recordings under PIPEDA and Quebec Law 25.
Get a free recommendation
Tell us about your business and we will tell you honestly whether Vapi, Retell AI or something else fits best.