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

Aircall - Aircall is a call center software of a new generation designed for fast growing companies. Setup instantly and integrates to your CRMs

JustCall - The Cloud Phone System of choice for modern sales and support teams. We help end clueless conversations by adding context to every call.

Zendesk - Zendesk is a beautiful, lightweight help-desk solution.

Dialpad - Switch is a cloud-based phone system built for Google Apps users.

Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community