Retell AI vs Vapi: Which Is Better in 2026?
Affiliate disclosure: links to both tools are affiliate links — we may earn a commission at no cost to you. Our comparison is based on editorial research.
Retell AI and Vapi are the two leading platforms for building AI phone agents, and both bill by the minute. Retell is the managed, production-ready option with sub-second latency and compliance included; Vapi is the developer's toolkit, giving you full control over the voice, model and telephony stack at a lower platform fee.
| Retell AI | Vapi | |
|---|---|---|
| Our rating | 4.5/5 | 4.4/5 |
| Price from | $0.07/min | $0.05/min |
| Free plan | ✗ | ✗ |
| Free trial | ✗ | ✗ |
| Pricing model | Pay-as-you-go per-minute usage (voice + TTS + LLM + telephony stack), no monthly platform fee; custom-priced Enterprise | Usage-based: per-minute platform fee plus at-cost provider fees (STT/LLM/TTS/telephony), with optional enterprise contract |
| Best for | SMBs and mid-market teams deploying inbound phone agents fast | Developers building custom voice agents through an API-first platform |
| Standout | Voice AI | Voice AI |
| Platforms | Web-based (cloud SaaS) with REST API and SDKs; SIP trunking and Twilio/Telnyx telephony su | Web-based (cloud platform with REST API, SDKs, and dashboard) |
Managed AI phone agents with ~600ms latency, billed per minute
WHY PICK IT- HIPAA (self-serve BAA), SOC 2 Type II, and GDPR included free — Vapi charges $1,000/mo extra for HIPAA
- ~600ms voice latency, ranked the responsiveness leader in 2026 third-party benchmarks
- 20 free concurrent calls plus batch calling with no concurrency limits at $0.005/dial
Developer-first voice AI agents with a transparent $0.05/min platform fee
WHY PICK IT- Transparent pricing: $0.05/min platform fee with provider costs passed through at cost, no markup
- Bring your own STT/LLM/TTS API keys and provider fees drop to $0 on Vapi's side
- Huge model flexibility — mix and match transcribers, LLMs, and voices from providers like Deepgram, OpenAI, Anthropic, and ElevenLabs
The verdict
Choose Retell AI if you want an agent live fast with compliance handled — ideal for healthcare, appointment-setting and teams that don't want to assemble their own voice stack.
Choose Vapi if you're a developer who wants to choose your own LLM, TTS and telephony providers and tune cost, and you don't need bundled HIPAA.
Bottom line: Regulated or speed-to-production teams pick Retell; engineering teams wanting stack control pick Vapi.