chompSMS is described as 'You love your Android phone as much as we do? You SMS all the time? Then chompSMS is for you: it's so convenient, and has a great user interface with chat style text bubbles' and is an app in the Social & Communications category. There are more than 25 alternatives to chompSMS for a variety of platforms, including Android, iPhone, Windows, Online / Web-based and Android Tablet. The best alternative is Signal, which is both free and Open Source. Other great apps like chompSMS are WhatsApp (Free), Zulip (Free Personal, Open Source), QKSMS (Free, Open Source) and Google Messages (Free).
Signal is a messaging app with an unexpected focus on privacy, combined with all the features expected from a modern IM app. Signal has received a lot of praise from all around the world for its security and privacy-respecting technologies.
WhatsApp is an iPhone and Android messaging app which allows you to exchange messages without having to pay for SMS. In addition to basic messaging WhatsApp users can create groups, send each other unlimited images, video and audio media messages.
Messages is Google's communications app for Android to helps send and receive SMS and MMS messages. You can also send group texts as well as your favorite pictures, videos and even audio messages to your contacts.
aTalk is an XMPP client that supports the following features: * Instant messaging in plain text and End-to-End encryption with OMEMO or OTR * OMEMO encryption is available during multi-user group chat session, giving users maximum privacy and security * Supports both voice...
Fully open source instant messaging server and clients. No proprietary components or non-free dependencies. Backend in pure Go (GPL 3.0), with a command-line administration tool in python + gRPC. Clients for Android, iPhone, and Web - ReactJS (all licensed under Apache 2.0).