SimpleX Chat 6.3.1

SimpleX is a messaging platform that prioritizes privacy, positioning itself as the first to operate without user identifiers of any kind—emphasizing a 100% private design philosophy.

For a comprehensive security assessment by Trail of Bits, visit here.

SimpleX Chat features:

• End-to-end encrypted messages, including editing, replies, and deletion.
• Disappearing messages with opt-out per contact/group.
• NEW message reactions.
• NEW delivery receipts, with opt-out per contact.
• Multiple chat profiles, offering hidden profiles.
• App access and self-destruct passcodes.
• Incognito mode—exclusive to SimpleX Chat.
• Sending end-to-end encrypted images and files.
• Voice messages up to 5 minutes—also end-to-end encrypted.
• "Live" messages that update as you type them for all recipients every few seconds—unique to SimpleX Chat.
• Single-use and long-term user addresses.
• Secret chat groups where only members know of its existence and participants.
• End-to-end encrypted audio and video calls.
• Connection security code verification for contacts and group members—protecting against man-in-the-middle attacks such as invitation link substitution.
• Private instant notifications.
• Encrypted portable chat database allows transferring chat contacts and history to another device.
• Animated images and "stickers" sourced from GIFs, PNG files, and third-party keyboards.

SimpleX Chat advantages:

• Privacy of your identity, profile, contacts, and metadata provided by avoiding phone numbers or any other user identifiers—protecting communication privacy from SimpleX servers and external observers alike.
• Complete protection against spam and abuse due to the absence of identifiers on the SimpleX platform; contact requires sharing a one-time invitation link or an optional temporary user address.
• Full ownership, control, and security of your data with all user data stored on client devices; messages are only temporarily held on SimpleX relay servers until received.
• A decentralized proxied peer-to-peer network enables using SimpleX Chat via personal relay servers while communicating with users on pre-configured or other SimpleX relay servers.
• Fully open-source code implementation ensuring transparency throughout the platform.

You can connect with anyone by sharing a link or scanning a QR code—eliminating the need for emails, phone numbers, or passwords during initial setup.
Your profile and contacts remain exclusively stored in the app on your device; relay servers remain devoid of this information.
All messages are end-to-end encrypted using the open-source double-ratchet protocol, delivering content through open-source SimpleX Messaging Protocol.
To address any queries, connect with the team through the app settings or via email at [email protected]. Additionally, submit issues on GitHub at this link.

Discover more about SimpleX Chat at its website: https://simplex.chat.
Explore the source code in the GitHub repository: https://github.com/simplex-chat/simplex-chat.
Stay updated by following SimpleX on Reddit (r/SimpleXChat/), Twitter (@SimpleXChat), and Mastodon (Mastodon) for the latest developments.