Spike - Spike solves businesses' communication chaos by bringing together email, team chat, collaborative docs, and meetings, into one feed.
PhoneLeash: SMS/MMS forwarding - PhoneLeash: SMS/MMS forwarding app offers features that let you forward your desired text messages and multimedia messages to your email or your other mobile phone so that you can access them later.
ProtonMail - Secure email with absolutely no compromises. Get your free encrypted email account today.
SMS Plus - SMS Plus app offers features that let you forward text messages through internet connection as well as through other social media platforms.
Seald - Keep your conversations secure, everywhere.
Easy Message - Easy Message app comes up with features to help users in effortlessly sending text messages to a phone number, which is not in the contact list.