The best free alternative to 3CX Phone System is Asterisk, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to 3CX Phone System and many of them is free so hopefully you can find a suitable replacement. Other interesting free alternatives to 3CX Phone System are FreePBX (Free, Open Source), YakYak (Free, Open Source), Facechat (Free) and Wazo (Free, Open Source).
FreePBX is a web-based open source GUI (graphical user interface) that controls and manages Asterisk (PBX), an open source communication server. FreePBX is licensed under the GNU General Public License (GPL), an open source license.
FreeSWITCH is a scalable open source cross-platform telephony platform designed to route and interconnect popular communication protocols using audio, video, text or any other form of media. It was created in 2006 to fill the void left by proprietary commercial solutions.
With a superbly designed and intuitive user interface, the softphone offers easy set up with lots of preconfigured VoIP providers built in and smart call management features. Enjoy high quality enterprise communication features with zero effect on battery life.
Walkie is a better way to communicate for distributed teams that don't want to spend all day in dry text channels.Voice OnlyA voice only communication tool that enables teams to communicate with emotion and purpose.Distraction Free
Paltalk is an instant messaging service that enables users to communicate via internet chat, voice and video chat. It offers chat rooms and the ability for users to create their own public virtual chat room.