Open-source, multi-tenant PBX you actually own

ICTPBX is an open-source, self-hosted PBX platform for ISPs, ITSPs, and service providers who want to run white-label voice, fax, and SMS without per-user licensing fees.

It pairs the FreeSWITCH media engine with a unified ICTCore REST API and a modern Angular dashboard — so extensions, IVR, queues, trunks, billing, and quotas are all managed from one place.

Key things that make it different from hosted PBX SaaS tools:

• Full multi-tenancy with isolated domains per client, and per-tenant branding for a true reseller model

• WebRTC softphone built in — call from the browser, no plugin needed

• Fax over IP + inbound Fax-to-Email

• Fraud/credit controls to cap concurrent calls per tenant

• Runs entirely on your own infrastructure — your data, your uptime, your rules

We built it because most PBX platforms either lock you into per-seat SaaS pricing or don't give service providers real multi-tenant isolation. Would love feedback from anyone running VoIP infra or reselling telephony services.