Smallest AI vs Retell AI
How the two platforms compare on pricing, live demos, calls, integrations, and setup — highlighted where they differ.
Voice Agent Platform
Smallest AI
Voice agent platform built on Smallest AI's own speech-to-text, text-to-speech and small language models.
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 | Smallest AI | Retell AI |
|---|---|---|
| Platform type | Voice Agent Platform | Voice Agent Platform |
| Pricing | $0.10-$0.22/min Pay as you go $0.09-$0.21/min plus $0.01/min hosting; Enterprise from $0.05/min | $0.07-$0.31/min $0.07-$0.31/min; custom pricing available |
| Test it | Free trial | Free trial |
| Calls | Inbound, Outbound | Inbound, Outbound |
| Human handoff | No | Yes |
| Setup difficulty | Medium | Medium |
| Use cases | Customer Support Outbound Calling Lead Qualification Custom Voice Apps | Customer Support Appointment Scheduling Lead Qualification AI Receptionists |
| Useful for |
|
|
| Integrations | ||
| Plivo | — | |
| Vonage | — | |
| Twilio SIP | — | |
| Telnyx SIP | — | |
| LiveKit | — | |
| Pipecat | — | |
| n8n | — | |
| Twilio | — | |
| Custom API | — | |
| Zapier | — | |
| +2 more across these tools — see each profile for the full list. | ||
Platform type
- Smallest AI
- Voice Agent Platform
- Retell AI
- Voice Agent Platform
Pricing
- Smallest AI
$0.10-$0.22/min
Pay as you go $0.09-$0.21/min plus $0.01/min hosting; Enterprise from $0.05/min
- Retell AI
$0.07-$0.31/min
$0.07-$0.31/min; custom pricing available
Test it
- Smallest AI
- Free trial
- Retell AI
- Free trial
Calls
- Smallest AI
- Inbound, Outbound
- Retell AI
- Inbound, Outbound
Human handoff
- Smallest AI
- No
- Retell AI
- Yes
Setup difficulty
- Smallest AI
- Medium
- Retell AI
- Medium
Use cases
- Smallest AI
- Customer SupportOutbound CallingLead QualificationCustom Voice Apps
- Retell AI
- Customer SupportAppointment SchedulingLead QualificationAI Receptionists
Useful for
- Smallest AI
- • Low-latency phone agents
- • One vendor for speech models and agent hosting
- • Multilingual text-to-speech
- • Outbound campaigns
- Retell AI
- • Fast voice prototypes
- • Support call automation
- • Scheduling workflows
Integrations
| Smallest AI | Retell AI | |
|---|---|---|
| Plivo | — | |
| Vonage | — | |
| Twilio SIP | — | |
| Telnyx SIP | — | |
| LiveKit | — | |
| Pipecat | — | |
| n8n | — | |
| Twilio | — | |
| Custom API | — | |
| Zapier | — |
+2 more across these tools — see each profile for the full list.
What would these cost to run?
Enter your call volume once and see Smallest AI and Retell AI priced at the same usage, ranked alongside every other platform.