qlingen.

Qlingen vs FusionPBX

Open-source multi-tenant FreeSWITCH GUI · FusionPBX project, United States

FusionPBX is the long-standing open-source web interface for FreeSWITCH and, like Qlingen, is multi-tenant by design. Qlingen is a FusionPBX alternative you run on your own cloud: a multi-tenant phone system on FreeSWITCH with call queues, callbacks, a browser softphone, a mobile app, an AI assistant and a full REST API — deployed and managed on a server in your own cloud account from one panel.

Feature comparison between Qlingen and FusionPBX
Feature Qlingen FusionPBX
Where it runs Your own cloud account (Vultr, DigitalOcean, Hetzner, Linode, AWS, Google Cloud), deployed in one click Self-hosted
How you pay No per-user software fee: add seats without a new licence Free, paid support and training optional
Several companies on one system Yes, built in: each tenant has its own numbers, users and settings Yes
Call queues Yes, with agent login, strategies and hold music Yes
Queue callbacks (press 0, keep your place) Yes, included Not built in
Position and estimated wait announcements Yes, included Partial, position only
Browser softphone Yes, WebRTC in any browser Not built in
Mobile app Yes, with push wake-up and colleague chat Not built in
AI assistant that changes the setup for you Yes: ask in plain language, approve the plan, it runs No
REST API Yes, everything in the panel, per-tenant tokens Limited
Custom call logic Yes, your own FreeSWITCH XML with a safety allowlist Yes, full XML access
Who holds your call data You do, on your server You do, on your server

Why businesses choose Qlingen over FusionPBX

  • ✓A clean, guided interface built on a modern framework. FusionPBX exposes everything, which also means a steep learning curve for office staff.
  • ✓Queue position, estimated wait and press-to-callback come configured out of the box.
  • ✓A built-in browser softphone, a mobile app and a presence board, where FusionPBX relies on third-party clients.
  • ✓An AI assistant and a documented REST API for every object.

Where FusionPBX is strong

  • •Free, open source and genuinely multi-tenant.
  • •Exposes almost every FreeSWITCH knob for experts who want full control.
  • •Runs on modest hardware and has a long track record with ITSPs.

Frequently asked questions

Is Qlingen a good alternative to FusionPBX?
Yes for most businesses. Qlingen covers extensions, ring groups, call queues, IVR menus, voicemail, conferences, time conditions, inbound and outbound routing, a browser softphone and a mobile app. FusionPBX is the long-standing open-source web interface for FreeSWITCH and, like Qlingen, is multi-tenant by design.
What does FusionPBX do better than Qlingen?
Free, open source and genuinely multi-tenant. Exposes almost every FreeSWITCH knob for experts who want full control. Runs on modest hardware and has a long track record with ITSPs.
Where is Qlingen stronger than FusionPBX?
A clean, guided interface built on a modern framework. FusionPBX exposes everything, which also means a steep learning curve for office staff. Queue position, estimated wait and press-to-callback come configured out of the box. A built-in browser softphone, a mobile app and a presence board, where FusionPBX relies on third-party clients. An AI assistant and a documented REST API for every object.
Can I move from FusionPBX to Qlingen without losing my numbers?
Yes. Your numbers stay with your carrier, or you port them to any SIP trunk provider, and point the trunk at Qlingen. Extensions, ring groups and menus are recreated in the web interface or in bulk through the REST API.

Ready to see Qlingen on your own cloud?

Create an account, connect your cloud provider, and your first PBX server is about fifteen minutes away — then compare it with FusionPBX on your own calls. Every account starts with a 7-day free trial, no card required.

Start your free trial

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