How do I connect RustPBX to an AI voice agent?

Voice agent functionality is separate in the Active Call repo; set up the HTTP router to route calls via webhooks to your AI service, using JSON responses for actions like 'forward' to AI endpoints.

RustPBX vs Asterisk: which is better for a modern contact center?

RustPBX excels with its HTTP/WebSocket programmability and AI-native design, while Asterisk has a larger module ecosystem but a more closed, C-based architecture. Choose RustPBX for deep web integration.

Can RustPBX handle call recording and transcription locally?

Yes, it uses SipFlow for unified recording and SenseVoice for offline transcription without cloud dependency, with files stored hourly to prevent handle exhaustion.

What's the license cost for the commercial edition?

The README doesn't specify pricing; you must contact hi@miuda.ai for commercial licensing, which includes features like VoIP wholesale and enterprise auth.

How to set up WebRTC phones with RustPBX?

It includes a built-in WebRTC softphone in the web console; configure SIP over WebRTC in the proxy settings and use the access layer for browser-based endpoints.

Is RustPBX good for small business phone systems?

It can work but may be overkill if you don't need AI integration or deep programmability; simpler systems like FreePBX might be easier for basic setups.

rustpbx

MITRust0.4.6

A high-performance, AI-native software-defined PBX built in Rust for programmable contact centers.

Visit Website GitHub

What is rustpbx?

RustPBX is a modern, software-defined PBX (Private Branch Exchange) built in Rust, designed as a high-performance, AI-native communication platform for next-generation contact centers. It fundamentally differs from traditional systems like Asterisk by exposing all call control via HTTP, WebSocket, and webhooks, making it fully programmable and enabling AI to be a native participant in every call.

Target Audience

Developers and organizations building programmable contact centers, AI voice agents, cloud call centers, enterprise unified communications, VoIP wholesale platforms, or compliance recording systems that require deep integration with modern applications and AI.

Value Proposition

Developers choose RustPBX over traditional PBX systems because it externalizes all control logic via standard web protocols (HTTP/WebSocket/Webhook), making it fully programmable in any language and seamlessly integrable with AI and business applications, without relying on closed architectures or C modules.

Overview

A PBX written by rust

Use Cases

Best For

Building AI contact centers where an AI Voice Agent handles incoming calls and transfers to human agents for complex issues.

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Developing cloud call centers with multi-tenant SaaS architectures, remote agents, and WebRTC + SIP endpoints.

Creating enterprise unified communication systems with internal communication, conferencing, voicemail, and CRM/OA integration.

Implementing VoIP wholesale platforms for multi-carrier routing, flexible billing, and profit optimization (requires Commercial edition).

Setting up compliance recording for financial or healthcare sectors, including AI quality inspection and PCI masking.

Running outbound marketing campaigns with predictive dialing, call analytics, and lead scoring.

Not Ideal For

Small offices or hobbyists needing a simple, pre-configured PBX with minimal DevOps overhead
Projects requiring advanced IVR or visual voicemail without purchasing the commercial edition
Teams heavily reliant on legacy telephony hardware or proprietary PBX modules not supported via HTTP/WebSocket
Environments where immediate, extensive third-party plugin ecosystems are critical

Pros & Cons

Pros

High Performance Scaling

Benchmark data shows it handles 800 concurrent calls with low latency and predictable CPU/memory usage, as detailed in the resource scaling estimates.

Full External Programmability

Exposes all call control via HTTP router webhooks and WebSocket RWI, enabling integration with any language and AI systems, unlike traditional C-module PBXs.

Modern Protocol Support

Supports SIP over UDP/TCP/WS/TLS/WebRTC with RTP relay and NAT traversal, making it cloud-native and suitable for remote agents.

Built-in Observability Tools

Includes a web console with RBAC, Prometheus metrics, OpenTelemetry tracing, and SipFlow recording for unified SIP+RTP capture.

Cons

Commercial Feature Lock

Key features like VoIP wholesale, IVR visual editor, and enterprise auth are only in the paid edition, limiting the community version's appeal for enterprise use.

Complex Initial Setup

Requires Docker or building from source with dependencies like CMake and OpenSSL, and configuration involves TOML files and realm settings for NAT traversal.

Niche Ecosystem Maturity

Compared to Asterisk, it has a smaller community and fewer third-party modules, which might slow adoption for teams needing proven integrations.

Open Source Alternative To

rustpbx is an open-source alternative to the following products:

F

FreeSWITCH

FreeSWITCH is a scalable open-source telephony platform for building voice, video, and messaging applications, supporting protocols like SIP, WebRTC, and PSTN.

V

VOS3000

A VoIP softswitch platform used for managing and operating telecommunications services, including call routing, billing, and customer management.

Asterisk

Asterisk is an open-source framework for building communications applications, such as VoIP gateways, conference servers, and PBX systems.

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