Dialpad - Switch is a cloud-based phone system built for Google Apps users.
Seald - Keep your conversations secure, everywhere.
RingCentral - RingCentral is the leading provider of cloud-based communications and collaboration solutions for small business and enterprise companies
Crypho - End-to-end-encrypted messaging and file sharing
Aircall - Aircall is a call center software of a new generation designed for fast growing companies. Setup instantly and integrates to your CRMs
Spike - Spike solves businesses' communication chaos by bringing together email, team chat, collaborative docs, and meetings, into one feed.