All comparisons
AssemblyAI vs Vapi
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.
Developer API
Vapi
Developer-oriented voice agent platform for building phone agents with custom workflows and integrations.
Highlighted rows differ between these picks
| Attribute | AssemblyAI | Vapi |
|---|---|---|
| Platform type | Voice Agent Platform | Developer API |
| Pricing | $0.075/min $4.50/hour ($0.075/min) | $0.13-$0.33/min $0.05/min hosting + provider costs |
| Test it | Open live demo | Free trial |
| Calls | Inbound, Outbound | Inbound, Outbound |
| Human handoff | No | Yes |
| Setup difficulty | Technical | Technical |
| Use cases | Customer Support Appointment Scheduling Lead Qualification Healthcare Intake | Customer Support Appointment Scheduling Lead Qualification Outbound Calling |
| Useful for |
|
|
| Integrations | ||
| Custom API | ||
| Twilio | ||
| WebSocket API | — | |
| Tool calling | — | |
| LLM Gateway | — | |
| Guardrails | — | |
| Zapier | — | |
| CRM | — | |
| Calendar | — | |
Platform type
- AssemblyAI
- Voice Agent Platform
- Vapi
- Developer API
Pricing
- AssemblyAI
$0.075/min
$4.50/hour ($0.075/min)
- Vapi
$0.13-$0.33/min
$0.05/min hosting + provider costs
Test it
- AssemblyAI
- Open live demo
- Vapi
- Free trial
Calls
- AssemblyAI
- Inbound, Outbound
- Vapi
- Inbound, Outbound
Human handoff
- AssemblyAI
- No
- Vapi
- Yes
Setup difficulty
- AssemblyAI
- Technical
- Vapi
- Technical
Use cases
- AssemblyAI
- Customer SupportAppointment SchedulingLead QualificationHealthcare Intake
- Vapi
- Customer SupportAppointment SchedulingLead QualificationOutbound Calling
Useful for
- AssemblyAI
- • Developer teams
- • Real-time voice agents
- • Streaming speech accuracy
- Vapi
- • Developer teams
- • Custom call workflows
- • Voice AI prototypes
Integrations
| AssemblyAI | Vapi | |
|---|---|---|
| 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 Vapi priced at the same usage, ranked alongside every other platform.