The best Phone System alternative to 3CX is Thirdlane Connect. It's not free, so if you're looking for a free alternative, you could try XiVO. If that doesn't suit you, our users have ranked more than 25 alternatives to 3CX and four of them are Phone Systems so hopefully you can find a suitable replacement. Other interesting Phone System alternatives to 3CX are Thirdlane Multi Tenant PBX and Thirdlane Business Phone System.
Thirdlane Connect is a versatile collaboration tool that combines messaging, voice, video, and app integration into a cohesive and efficient experience on any platform.
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.
Thirdlane® Business Phone System stands as an advanced IP PBX and Unified Communications solution, designed for both on-premises and cloud deployment.
XiVO is an IP-PBX, a unified communications platform that connects phones on a local or private network with other networks such as public landlines and mobile telephones.
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Feature rich application and great support