3CX is described as 'Software-based, open standards IP PBX that offers complete Unified Communications, out of the box' and is a web conferencing tool in the social & communications category. There are more than 25 alternatives to 3CX for a variety of platforms, including Linux, Windows, Mac, Web-based and Android apps. The best 3CX alternative is Thirdlane Connect. It's not free, so if you're looking for a free alternative, you could try Asterisk or FreePBX. Other great apps like 3CX are Thirdlane Multi Tenant PBX, FreeSWITCH, YakYak and Yate - Yet Another Telephony Engine.
Thirdlane Connect is a versatile collaboration tool that combines messaging, voice, video, and app integration into a cohesive and efficient experience on any platform.
Asterisk is an open source framework for building communications applications. Asterisk turns an ordinary computer into a communications server. Asterisk powers IP PBX systems, VoIP gateways, conference servers and other custom solutions.
Thirdlane® Multi Tenant PBX Platform is a reliable, cost-effective Unified Communications software widely used by MSPs, UCaaS providers, resellers and enterprises around the World.
FreePBX is a web-based open source GUI (graphical user interface) that controls and manages Asterisk (PBX), an open source communication server.
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.
Yate is a softswitch (concept of separating the network hardware from network software).
Wazo is mainly an IPBX that provides communication services such audio, video, and instant messaging based on the use of standard network technologies such as the TCP/IP protocol. It is interoperable with most market telephony systems and gives users access to flexible and...
Thirdlane® Business Phone System stands as an advanced IP PBX and Unified Communications solution, designed for both on-premises and cloud deployment.
Feature rich application and great support
Instant messaging with voice and video options, live group video chat for up to 10 participants, public and private rooms, interest communities, mobile and desktop access, user-created rooms, moderation tools, and options for anonymous participation.
Kamailio® (successor of former OpenSER and SER) is an open source SIP server released under GPL, able to handle thousands of call setups per second. Among features: asynchronous TCP, UDP and SCTP, secure communication via TLS for VoIP (voice, video); WebSocket support for...
Spreed is the worldwide unified web conferencing service offering integrated web and telephone conferencing. It is based on Flash Player. Free service includes 3 attendees and max 1.5h meetings. Single events or monthly service can be purchased.
United States
Canada
Germany
EU
YakYak is a client for Google Hangouts, while 3CX is a VoIP call center system