SUM - Secure Ultimate Messenger

SUM: Secure Ultimate Messenger

Free and open-source encrypted messenger app for Android with end-to-end encryption, group chats, file sharing, and voice/video calling features

What is SUM - Secure Ultimate Messenger?

SUM - Secure Ultimate Messenger is a free, open-source, encrypted messenger app for Android. It focuses on providing secure encrypted messaging and calls to protect user privacy.

SUM utilizes end-to-end encryption to keep chats, calls, shared media and files private. It uses strong encryption protocols to prevent any third-party, including SUM's developers, from accessing communication contents. SUM also regularly implements upgrades to strengthen its encryption implementation and security.

In addition to encrypted messaging, SUM has features including group chats with up to 10,000 members, file sharing up to 2GB, voice and video calls, auto-destruct timers, direct chat links, and more. It has customizable themes and notification settings.

As an open-source app, SUM's codebase is transparent and auditable by the community. Expert cryptographers can verify its encryption is properly implemented without security flaws or backdoors. SUM is updated frequently with new features and security hardening.

Overall, SUM focuses strongly on privacy through state-of-the-art encryption. For users wanting an open-source, securely encrypted messenger and communication app on Android, SUM is a leading choice.

SUM - Secure Ultimate Messenger Features

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