All comparisons
AssemblyAI vs Retell AI
How the two platforms compare on pricing, live demos, calls, integrations, and setup — highlighted where they differ.
Voice Agent Platform
AssemblyAI
Voice AI infrastructure and managed Voice Agent API for production real-time voice agents.
Voice Agent Platform
Retell AI
Voice AI platform for building low-latency phone agents across support, scheduling, and sales workflows.
Highlighted rows differ between these picks
| Attribute | AssemblyAI | Retell AI |
|---|---|---|
| Platform type | Voice Agent Platform | Voice Agent Platform |
| Pricing | $0.075/min $4.50/hour ($0.075/min) | $0.07-$0.31/min $0.07-$0.31/min; custom pricing available |
| Test it | Open live demo | Free trial |
| Calls | Inbound, Outbound | Inbound, Outbound |
| Human handoff | No | Yes |
| Setup difficulty | Technical | Medium |
| Use cases | Customer Support Appointment Scheduling Lead Qualification Healthcare Intake | Customer Support Appointment Scheduling Lead Qualification AI Receptionists |
| Useful for |
|
|
| Integrations | ||
| Custom API | ||
| Twilio | ||
| WebSocket API | — | |
| Tool calling | — | |
| LLM Gateway | — | |
| Guardrails | — | |
| Zapier | — | |
| CRM | — | |
| Calendar | — | |
Platform type
- AssemblyAI
- Voice Agent Platform
- Retell AI
- Voice Agent Platform
Pricing
- AssemblyAI
$0.075/min
$4.50/hour ($0.075/min)
- Retell AI
$0.07-$0.31/min
$0.07-$0.31/min; custom pricing available
Test it
- AssemblyAI
- Open live demo
- Retell AI
- Free trial
Calls
- AssemblyAI
- Inbound, Outbound
- Retell AI
- Inbound, Outbound
Human handoff
- AssemblyAI
- No
- Retell AI
- Yes
Setup difficulty
- AssemblyAI
- Technical
- Retell AI
- Medium
Use cases
- AssemblyAI
- Customer SupportAppointment SchedulingLead QualificationHealthcare Intake
- Retell AI
- Customer SupportAppointment SchedulingLead QualificationAI Receptionists
Useful for
- AssemblyAI
- • Developer teams
- • Real-time voice agents
- • Streaming speech accuracy
- Retell AI
- • Fast voice prototypes
- • Support call automation
- • Scheduling workflows
Integrations
| AssemblyAI | Retell AI | |
|---|---|---|
| Custom API | ||
| Twilio | ||
| WebSocket API | — | |
| Tool calling | — | |
| LLM Gateway | — | |
| Guardrails | — | |
| Zapier | — | |
| CRM | — | |
| Calendar | — |
What would these cost to run?
Enter your call volume once and see AssemblyAI and Retell AI priced at the same usage, ranked alongside every other platform.