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Ultravox.ai
✓ verifiedFreemium
Speech-native voice AI infrastructure and APIs for developers building low-latency, natural-sounding conversational voice agents.
1.9K saves
Pricing
Pay Go: $0/month (5 cents per minute including TTS, up to 5 concurrent calls)
Pro: $100/month billed yearly (no hard concurrency caps)
Free trial available
Core features
- ✦Speech-native model that processes audio directly without transcription bottleneck
- ✦Neural voice activity detection for natural turn-taking
- ✦REST APIs and SDKs for web and mobile integration
- ✦Built-in telephony provider integrations
- ✦Self-managed inference stack for low latency at scale
- ✦Open-weight core models available on Hugging Face
Use cases
- →Building real-time conversational voice agents for customer support
- →Adding voice interfaces to existing applications
- →Powering telephony-based AI voice assistants
- →Research and experimentation with speech-native AI models
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