Tempo Messaging is described as 'Tempo is a privacy-focused messaging app designed for secure communication. Features include end-to-end encryption, restrictions on screenshots and screen recordings, and self-destructing messages' and is a instant messenger in the security & privacy category. There are more than 50 alternatives to Tempo Messaging for a variety of platforms, including Android, iPhone, Windows, Mac and iPad apps. The best Tempo Messaging alternative is Signal, which is both free and Open Source. Other great apps like Tempo Messaging are Telegram, Element, Matrix and Tox.
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).
Vector encompasses the ideals of freedom through free and open-source technology, using a "Privacy by Principle" approach. This means that privacy is not a feature or add-on, but the core foundation that Vector is built upon, which is granted and accessible to everyone.
KakaoTalk 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)
United States
South Korea