Vapi is a developer-first voice API with a cascaded pipeline. Duvox delivers full-duplex voice AI with lower latency, built specifically for real estate outbound calling.
Vapi chains STT + LLM + TTS in sequence. Each hop adds 200-500ms of latency. Duvox skips the cascade entirely with full-duplex processing. The result: conversations that feel human, not robotic.
Every millisecond of delay costs you leads. When your AI pauses for 1-2 seconds mid-conversation, the prospect knows it is a robot. Duvox responds in real-time. Prospects stay on the line. Conversion rates go up.
Vapi gives you building blocks. You still need to build campaign management, lead handling, CRM sync, and analytics yourself. Duvox ships all of that. Upload leads and launch a campaign in minutes, not weeks.
Vapi routes your calls through their servers. Duvox runs on your infrastructure. Full control over data, compliance, and cost. No per-minute fees that scale with usage.
| Feature | Duvox | Vapi |
|---|---|---|
| Full-duplex voice | ||
| Sub-500ms latency | ||
| Self-hosted option | ||
| Per-minute pricing | ||
| Campaign management | ||
| Lead sequences | ||
| Real estate templates | ||
| CRM integration | Via webhook | |
| Appointment booking | Via integration | |
| Number rotation | ||
| Call analytics | ||
| Developer API |
Pricing based on publicly available information as of February 2026. Subject to change.
Join the waitlist for early access. Limited spots for launch partners who want to shape the product.