Apps similar to Natterbox include Asterisk, which is free and open source. Other options are RingCentral, miniSIPServer, Slingshot VoIP and 8x8 Virtual Office. In total there are six Phone Systems like Natterbox for Mac, Windows, the web, iPad and iPhone.
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.
Canada
Integrated cloud solution for business communication offering calls, video, messages, and fax. Provides scalable solutions, real-time chat, HD video conferencing, and robust security, serving 400,000+ customers in over 100 countries with renowned uptime and AI-powered interactions.
United States
You will be able to setup your own VOIP system in ONE HOUR. miniSIPServer can run on Windows, Linux and even Raspberry Pi. We can also run it on kinds of virtual machine systems, such as Hyper-V, VMWare, KVM, Xen.
Cloud communications service provider that offers Business VoIP and Virtual PBX solutions to small and medium sized organizations.
Use your iPhone, iPad or iPod touch to make and receive calls using your 8x8 Virtual Office phone service. Now your 8x8 business phone extension can be truly mobile!.
United States
WatBox is a Salesforce-native platform that embeds WhatsApp, SMS, and CTI calling into Salesforce, letting sales and support teams manage customer conversations, campaigns, and automation directly inside their Salesforce CRM with full context and history.
