Rambox is described as 'Free, open source and cross platform messaging and emailing app that combines common web applications into one' and is a well-known app in the Social & Communications category. There are more than 25 alternatives to Rambox for a variety of platforms, including Mac, Windows, Linux, the Web and Android. The best alternative is Franz, which is both free and Open Source. Other great apps like Rambox are Ferdi (Free, Open Source), Utopia (Free), Shift (Freemium) and Ripcord (Free Personal).
- Franz is a free messaging app / former Emperor of Austria and combines chat & messaging services into one application. Franz currently supports Slack, WhatsApp, WeChat, HipChat and many more. You can download Franz for Mac, Windows & Linux. View 64 alternatives to Franz
- Freemium • Open Source
Franz vs RamboxShare the same concept and very similar framework.
- Empathy is a messaging program which supports text, voice, video chat, and file transfers over many different protocols. View 150 alternatives to Empathy
Empathy is currently unmaintained. Last version, 3.25, released in August 2017, can be still downloaded from the official website.
- Free • Open Source