AI Voice Agent Platform
U
Ultravox
Speech-native multimodal LLM and managed API for real-time voice agents — no ASR stage, no TTS stage, audio in and out.
Pricing
$0.05 /min
Pay-as-you-go: $0.05/min (30 min free; 5 concurrent calls max). Pro: $100/mo (unlimited concurrency, outbound scheduler, 5 custom voices, 20 RAG corpora). SIP add-on: $0.005/min Pro / $0.0048/min Enterprise. Enterprise: custom SLA.
Free tier
Per minute Flat monthly Custom enterprise
View pricing page →
Verified April 2026
Capabilities
| Capability | Ultravox |
|---|---|
| Transcription | ✓ |
| Summarization | ✗ |
| Sentiment Analysis | ✗ |
| Real-Time Agent Assist | ✗ |
| Autonomous Voice Agent | ✓ |
| Virtual Agent (Chat) | ✗ |
| Conversation Intelligence | ✗ |
| Automated QA | ✗ |
| Intelligent Routing | ✗ |
| Predictive Dialer | ✗ |
| Voice Cloning | ✓ |
| Multilingual | ✓ |
| Coaching Workflows | ✗ |
| Workforce Management | ✗ |
Compliance & Security
No compliance certifications recorded for this vendor.
Integrations
Telephony
twiliotelnyxplivo
AI Models
meta llamaelevenlabscartesia
Other
PipecatLiveKitjambonzn8n
API documented