ISIM messenger

ISIM Messenger: Free Open-Source Instant Messaging

A free and open-source instant messaging application for Windows with end-to-end encryption, group chats, file transfers, and customizable themes.

What is ISIM messenger?

ISIM Messenger is a free, open-source instant messaging application for Windows operating systems. It was first released in 2019 by a non-profit organization called the ISIM Foundation.

Some key features of ISIM Messenger include:

• End-to-end encryption - Messages, files, and calls are encrypted from one device to another to prevent unauthorized access.
• Group chats - Create chat groups with up to 500 people to communicate and collaborate.
• Multimedia sharing - Send images, audio clips, documents, and other files seamlessly through chats and calls.
• Customizable interface - Personalize chat colors, backgrounds, notifications, and other display options.
• Secure cloud backup - Backup your chat history securely to ISIM's cloud servers.
• Cross-platform compatibility - Chat with contacts using other platforms like WhatsApp, Facebook Messenger, etc.

ISIM Messenger is praised for its privacy, security, customizability, and smooth user experience. It represents a viable open-source alternative to closed-source apps like WhatsApp or Skype for those prioritizing privacy and security.

ISIM messenger Features

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