Secure Messaging Systems

Using secure messaging systems is crucial for protecting the privacy and integrity of your communications. Here are some popular messaging systems that offer end-to-end encryption and those that do not by default.

End-to-End Encrypted Messaging Systems

1. Signal
   • Offers strong end-to-end encryption for messages, voice calls, and video calls.
   • Open source and highly recommended for secure communication.
   • Signal
2. Matrix/Element
   • An open standard for decentralized communication with end-to-end encryption.
   • Element is a popular client for the Matrix protocol.
   • Matrix / Element
3. WhatsApp
   • Provides end-to-end encryption for messages, voice calls, and video calls by default.
   • Owned by Meta (Facebook).
   • WhatsApp
4. Wire
   • End-to-end encryption for messages and calls
   • Open source with a strong focus on privacy.
   • Wire

Messaging Systems Without Default End-to-End Encryption

These messaging systems supposedly provides encryption for data in transit and at rest, but not end-to-end encryption for messages.

1. Telegram
   • Offers end-to-end encryption only for "Secret Chats".
   • Telegram
2. Discord
   • Does not offer end-to-end encryption for messages.
   • Discord
3. Zoom
   • End-to-end encryption for calls, but must be manually enabled.
   • Zoom
4. Slack
   • Does not offer end-to-end encryption for messages.
   • Slack
5. Microsoft Teams
   • Does not offer end-to-end encryption for messages.
   • Microsoft Teams

For secure communication, it is recommended to use messaging systems that offer end-to-end encryption by default.