BuzzTalk - BuzzTalk is Indian vernacular smart instant messenger
Spike - Spike solves businesses' communication chaos by bringing together email, team chat, collaborative docs, and meetings, into one feed.
Signal - Fast, simple & secure messaging. Privacy that fits in your pocket.
ProtonMail - Secure email with absolutely no compromises. Get your free encrypted email account today.
OfficeChat - OfficeChat is a secure messaging app to share rich messages, documents, pictures, videos and location with their colleagues.
Seald - Keep your conversations secure, everywhere.