Spike - Spike solves businesses' communication chaos by bringing together email, team chat, collaborative docs, and meetings, into one feed.
netadge - NetAdge is a mobile demand-side platform.
Keybase Chat - End-to-end encrypted chat built into Keybase
Persona.ly - Persona.ly offers game and app developers advanced tools for creating in-app advertising and acquiring quality users.
Crypho - End-to-end-encrypted messaging and file sharing
LoopMe - LoopMe is a platform for all mobile video ad formats, covering pre-roll, HTML5 and VAST, including native and full-screen formats.