Asterisk is described as 'is free software that transforms a computer into a communication server. Asterisk lets you build applications like PBX, VoIP gateway, IVR and ACD' and is an app in the Social & Communications category. There are more than 25 alternatives to Asterisk for a variety of platforms, including Linux, Windows, Mac, Online / Web-based and Android. The best alternative is 3CX Phone System, which is free. Other great apps like Asterisk are Wazo (Free, Open Source), FreeSWITCH (Free, Open Source), FusionPBX (Free, Open Source) and Kamailio (Free, Open Source).
sipXcom provides complete enterprise-grade telephony, unified messaging, Instant messaging, audio conferencing, and many other features. sipXcom can be run along side your existing Cisco, Avaya, Mitel, Shortel or other PBX while you migrate users to the sipXcom system.
Thirdlane® Multi Tenant PBX Platform is a reliable, cost-effective Multi Tenant IP PBX and Unified Communications software platform with support for voice, messaging, video, integrations Salesforce, Google, Office 365 and other applications.
Thirdlane Business PBX platform provides all of the easy-to-use advanced communications features businesses need, with the flexibility for customization and growth - at a fraction of the cost of competitive solutions.
Leverage maximum potential and cost effectiveness with VoIP telephony. Perfectly optimise your internal and external communication and intelligently shape your business processes around your business objectives.