Alternatives to RebTel for all platforms with any license

Hangouts

Hangouts is a messaging app that lets you send and receive messages, photos and more, and even start free video and voice calls – one to one or with a group! ...

Free Windows Web Android iPhone Chrome OS ... Android Tablet iPad Chrome Android Wear
Gmail integration Group chat Multi Device Support Texting ... Voice Call Voice messages WebRTC Add a feature

946 Like
WhatsApp Messenger

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...

Free Mac Windows Web Android iPhone ... S60 Blackberry Windows S Android Tablet Windows Phone Blackberry 10 Android Wear Kindle Fire
End-to-end encryption Built-in File transfer Encrypted chat Group chat ... Mobile friendly Based on phone number Video calling Voice messages Add a feature

603 Like
Wire

Wire is a secure and private messenger for phones, tablets and desktop. Crystal clear voice and video calls, private group chats, file sharing, audio and video messages...

Free Personal $ $ $ Open Source Mac Windows Linux Web Android ... iPhone Android Tablet iPad
End-to-end encryption Security focused Encrypted calls Encrypted chat ... Group chat Integrated File Sharing Photo Sharing Privacy focused Privacy Protected Share your screen Video calling Voice Call WebRTC Add a feature

163 Like
Viber

Viber is a mobile application that lets you make free phone calls and send text messages to anyone who also has the application installed. .

Freemium Mac OS X Windows Linux Android iPhone ... Windows RT Android Tablet Windows Phone iPad Blackberry 10 Apple Watch
Call Transfer Group chat Hidden chat Multiple languages ... Push to talk Secret chats Video calling Voice Call Add a feature

287 Like
appear.in

Video conversations with up to 8 people in your browser - no downloads, no login. Just name your channel and you are on. Works in all modern browsers, even mobile.

Freemium Windows Web Android iPhone Chrome OS ... Android Tablet iPad
Anonymity Anonymous email Group chat No installation ... No registration required Stickers WebRTC Add a feature

64 Like
Zulip

Zulip is a group chat app. Its most distinctive characteristic is that messages are threaded by topic, helping you have long-running, organized conversations....

Free Open Source Mac Windows Linux Web Android ... iPhone Android Tablet BSD Self-Hosted
Threaded Conversations Group collaboration Chat Bot Community based ... GitHub integration Group chat Integrated File Sharing MarkDown support Team Collaboration Add a feature

114 Like
Tango

Tango allows you to easily connect with friends & family or make new friends. Make video & voice calls, send text messages, play games, send music messages...

Freemium Android iPhone Android Tablet iPad
Photo Sharing Video calling Voice Call Add a feature

26 Like
Dasher Messenger

Dasher lets you do more than just text message. It's messaging with benefits: · Connect with friends worldwide for free · Start a group chat ·...

Free Web Android iPhone
Group chat Youtube integration Add a feature

12 Like
SeaFour.club

SeaFour.club is a socket webchat supporting aesthetic username customization and stylized messages using a markup language similar to 'LISP', and supports a...

Free Open Source Linux Web BSD
Ad-free Group chat Lightweight Add a feature

8 Like
Sesame Chat

Sesame is a messaging app that gives you a self-aware digital assistant to protect messages on your behalf: your own Personal Cognitive Messenger™. Your Cognitive...

Free Personal iPhone iPad
No features added Add a feature

7 Like
Camfrog

Free live webcam video chat room software for multiple desktop platforms including mobile platforms like iOS and Android. Make free live audio & video calls...

Freemium Mac OS X Windows Linux Android iPhone ... Android Tablet iPad Kindle Fire
Video calling Add a feature

11 Like
Fring

Fring is a VoIP (voice over internet) app that allows you to make 2-way video calls, voice calls and live chat for free, from your phone or iPod. It offers video...

Freemium Android iPhone
Texting Video calling Voice Call Add a feature

54 Like
- Discontinued The apps seem to be no longer updated. Last versions, released in February 2014, can be still downloaded from the appstores.
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Spreed

Spreed is the worldwide unified web conferencing service offering integrated web and telephone conferencing. It is based on Flash Player. Free service includes 3...

Commercial Mac OS X Windows Linux Web
Share your screen Add a feature

8 Like
WowApp

WowApp 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....

Freemium Mac OS X Windows Android iPhone Android Tablet ... iPad
Group chat Integrated File Sharing Video calling Voice Call Add a feature

3 Like
Tinode

Open 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)...

Free Open Source Web Android Self-Hosted
Ad-free Group chat Real time collaboration Add a feature

2 Like