3CX Phone System Alternatives

FreePBX is a web-based open source GUI that controls and manages Asterisk (PBX).

An open source telephony switching and private branch exchange service for Linux.

VoIPstudio is an award-winning VoIP system that offers businesses of all sizes a scalable communication solution. It’s inexpensive, easy-to-use, offers a full suite of PBX features, and is fully integrated for CRM.

Try for free paid Free Trial $4.99 / Monthly (User)

FreeSWITCH is an open-source media application designed to support popular protools such as SIP and WebRTC and provides a platform to develop voice and video applications.

FusionPBX is an open source FreeSWITCH GUI.

Aircall is a call center software of a new generation designed for fast growing companies. Setup instantly and integrates to your CRMs

As the foundation of great customer experience, the Genesys PureCloud contact center platform empowers your business to provide excellent service across the entire customer journey.

Kamailio® (successor of former OpenSER and SER) is an open source SIP server released under...

Utilities, Application Utilities, and Contact Management

VitalPBX is a full-feature PBX (phone system) based on Linux and Asterisk.

The Genesys PureConnect platform is an all-in-one customer experience solution that’s easy to use, flexible and customizable to your business needs.

Your Open Source Solution For Unified Comunnications And More…

PBXware is the world’s first and most mature IP PBX Professional Open Standards Turnkey Telephony Platform. Bicom Systems’ softswitch is offered in the Business, Call Center and Multi-Tenant Editions each supporting specific features.

Get the DMG Consulting report reprint on cloud contact centers.