SpeakPipe VS Voiceably

Telbee.io - telbee adds voice messaging to podcasts, websites, social media and email to easily hear from and build human relationships with your customers and community - save time, reduce frustration, and gain sales, understanding and fans

Grasshopper - Grasshopper enables entrepreneurs to build a virtual office that connects callers to employees, wherever they are.

Vocaroo - Vocaroo is a quick and easy way to share voice messages over the interwebs.

CallMultiplier - CallMultiplier is an all in one voice broadcasting and text messaging service that allows you to send automated calls and text.

statuspage - A simple self-hosted status page site with an API written in Django under the BSD license.

RingCentral - RingCentral is the leading provider of cloud-based communications and collaboration solutions for small business and enterprise companies