Vapi Alternative: PBX-Native Voice AI That Actually Integrates With Your Phone System
Vapi is a powerful developer-focused voice AI platform, but it lacks native PBX integration - you manage your own carrier. VoiceInfra registers AI agents directly as extensions on your existing PBX, no external SIP trunks required.
VoiceInfra vs Vapi: Feature-by-Feature
A transparent comparison so you can make the right choice for your business.
Developer-First Platform With Strong Community
Vapi offers excellent SDKs, a CLI, 200+ models and integrations, and an active developer community. They raised $20M Series A (Bessemer-led) and crossed 1 billion calls. If you have a dedicated engineering team and don't need deep PBX integration, Vapi is a solid choice.
No Native PBX Integration - You Manage Your Own Carrier
Vapi's SIP support is external only - you must bring and manage your own carrier. No PBX extension registration. The website widget is still in beta. With 200+ integrations available but all requiring technical setup, teams without engineering resources will struggle. Support is Discord and email on the Build plan - no SLA or dedicated engineering support on standard tiers.
Why Teams Choose VoiceInfra Over Vapi
VoiceInfra is built from the ground up for telecom operators, MSPs, and contact centers who need deep PBX integration.
Native PBX Extension Registration
Register AI agents as extensions on your existing PBX. Zero carrier changes, zero hardware. Vapi requires you to manage your own SIP trunk.
Custom Engineering Support
Our engineers build custom integrations for you. Vapi's standard plans offer Discord and email support only - you're on your own for complex setups.
No-Code + Full API Access
Get Vapi's developer flexibility PLUS a no-code builder your operations team can use. Deploy in 5 minutes without writing a line of code.
Vapi is great for dev teams who want to build voice AI from scratch. VoiceInfra is for businesses that need voice AI working on their existing phone system - today, without hiring engineers.
Contact SalesReady to switch?
See why businesses are choosing VoiceInfra over Vapi. Contact our sales team and we'll show you exactly how VoiceInfra handles what Vapi cannot.