Meet the world's leading cloud phone system — reimagined with powerful intelligence, workflow automation, video, messaging, and more. RingCentral MVP integrates phone, video, meetings, and messaging in one reliable, easy-to-use solution.
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- - RingCentral is the most popular Web-based, Windows, Android & Mac alternative to Natterbox.
- - RingCentral is the most popular free alternative to Natterbox.
- Sync with Google CalendarRingCentral can be synchronized with Google Calendar
- Ad-freeRingCentral doesn't contain any form of external advertising.
- Support for ThemesYou can use themes and templates to change the look and feel of RingCentral.
- Calendar IntegrationRingCentral lets you sync your tasks and events with your calendar application.
- Desktop SharingRingCentral enables you to share your screen with other people in the same office or working remotely.
- Support for @mentionsRingCentral supports the use of mentions through @ to a particular user, who will be notified personally.
- AES-256 EncryptionRingCentral has AES-256 Encryption, i.e. very strong security.
- Privacy focusedRingCentral is considered a privacy friendly alternative.
- Screen SharingYou can use RingCentral to share your screen with your colleages or friends.
Asterisk is free software that transforms a computer into a communication server. Asterisk lets you build applications like PBX, VoIP gateway, IVR and ACD.
- - Asterisk is the most popular Linux alternative to Natterbox.
- - Asterisk is the most popular Open Source alternative to Natterbox.
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.
- - miniSIPServer is the most popular commercial alternative to Natterbox.
Slingshot VoIP is a cloud-based communications provider that specializes in business VoIP service. Our platform delivers carrier-grade services including virtual PBX solutions that caters to small and medium sized companies.Suggest and vote on features
Slingshot VoIP Features
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!.