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AI Tool Comparison
Retell AI vs Vapi
A side-by-side breakdown to help you pick the right tool for your workflow.
Retell AI
Power phone and chat agents that sound natural in conversation, assembled from any mix of LLM, voice, and telephony provider.
Automation
freemium
Vapi
Build and deploy voice AI agents that handle phone calls, SMS, and chat at enterprise scale with sub-500ms latency.
Developer Tools
freemium
Bottom Line
Vapi edges ahead on rating (4.6 vs 4.5), but the right pick still comes down to which workflow you're running.
Choose Retell AI if…
Voice AI
Choose Vapi if…
Voice AI
| Attribute | Retell AI | Vapi |
|---|---|---|
| Category | Automation | Developer Tools |
| Pricing | freemium | freemium |
| Pricing Detail | Pay-as-you-go from $0.07-0.31/min / Enterprise custom | $0.05/min platform fee (all-in cost typically $0.07-0.33/min) |
| Rating |
Key Features
Retell AI
- Inbound and outbound calling
- Visual call flow builder
- CRM integrations
- Call recording and transcripts
- Phone number provisioning
- Real-time analytics
Vapi
- Sub-500ms latency
- Inbound and outbound calling
- Bring your own LLM
- Voice interruption handling
- Call analytics and transcripts
- Webhooks for custom logic
Pros
Retell AI
- •Full-stack voice solution, less infrastructure than building from components
- •Visual workflow builder requires no code for call logic
- •Strong integrations with healthcare and real estate tools
Vapi
- •Best latency in the voice AI category
- •Flexible model and voice provider support
- •Strong developer documentation
Cons
Retell AI
- Per-minute costs scale quickly at production volume
- Less model flexibility than raw API alternatives
Vapi
- Usage costs can scale quickly at volume
- Requires developer setup, not no-code