WhatsApp Messenger is a cross-platform mobile messaging app which allows you to exchange messages without having to pay for SMS. WhatsApp Messenger is available for iPhone, BlackBerry, Android, Windows Phone and Nokia and yes, those phones can all message each other! Because WhatsApp Messenger uses the same internet data plan that you use for email and web browsing, there is no cost to message and stay in touch with your friends.
tags: built-in-file-transfer chat-clients contacts-integration encrypted-chat end-to-end-encryptionConversations is a privacy focused, open source XMPP Texting [Jabber] client for Android 4.0+ smart phones with wife-approved easy encryption [OTR, OMEMO, or GPG].
tags: audio-chat chat-clients decentralized encrypted-chat end-to-end-encryptionOpen source Jabber (XMPP) client with multi-account support, clean and simple interface. Being both free (as in freedom!) and ad-free, Xabber is designed to be the best Jabber client for Android .
tags: chat-clients encrypted-chat google-talk instant-messaging jabberZulip is a group chat app.
tags: chat-servers github-integration group-chat group-collaboration integrated-file-sharingKakaoTalk is a phone number based messenger service that allows users anywhere in the world to chat one-to-one or in a group for free. (no SMS service)
tags: free-calls free-text group-chat instant-messaging phone-number-basedDasher lets you do more than just text message. It's messaging with benefits:
tags: animated-gif group-chat instant-messaging send-money share-linksSesame is a messaging app that gives you a self-aware digital assistant to protect messages on your behalf: your own Personal Cognitive Messengerâ„¢.
tags: sms-messaging smartphone-messaging personal-database personal-messagingtextPlus is the best way to send unlimited text messages from your android, iPhone, iPod, kindle, and windows devices with your textPlus phone number free and calling for just pennies.
tags: social-media sms-messaging cell-phoneSpotbros is an app where you can discover and share all types of content through public chat groups (Spots) or with your friends through private chats. Download our messaging app and get 1TB of free storage in the Spotbros cloud
tags: cloud-based group-chat instant-messaging mobile-chat online-backupWowApp helps you do good through the Power of Sharing. We share all revenues with you. WowApp Messenger is free and you can receive earnings without ever spending money.
tags: chat-clients earn-money group-chat instant-messaging integrated-file-sharingOpen source instant messaging server and clients. Backend in pure Go (license GPL 3.0), client-side binding in Java for Android and Javascript (license Apache 2.0), persistent storage RethinkDB. JSON over websocket (long polling is also available). Tinode is meant as a replacement for XMPP. Overall it's a lot like open source WhatsApp or Telegram.
tags: chat-clients chat-servers instant-messaging messaging whatsapp