PagerDuty - Cloud based monitoring service
Dialpad - Switch is a cloud-based phone system built for Google Apps users.
MultiBel - MultiBel is an emergency notification system. MultiBel alerts through the emergency app, telephone, email, SMS and pagers. MultiBel can be connected to hardware (e.g. fire alarms & emergency buttons) or software (HRM system, planning systems).
RingCentral - RingCentral is the leading provider of cloud-based communications and collaboration solutions for small business and enterprise companies
VirgilHR - VirgilHR offers the SaaS solution that empowers HR professionals to make smart, compliant employment decisions in real-time.
Aircall - Aircall is a call center software of a new generation designed for fast growing companies. Setup instantly and integrates to your CRMs