SimpleX Chat: secure messenger - iOS Social

SimpleX Chat - a private & encrypted open-source messenger without any user IDs (not even random ones)!

To use SimpleX, you can either make a private connection through a link or QR code. This messaging network is unique because it does not require any user identifiers, making it 100% private. A security assessment by Trail of Bits has been conducted and can be found on their website. SimpleX offers a variety of features such as quantum resistant end-to-end encryption, disappearing messages, message reactions, and delivery receipts. It also has multiple chat profiles, incognito mode, and the ability to send end-to-end encrypted images, files, and voice messages.

One of the main advantages of SimpleX is the privacy it provides. Unlike other messaging platforms, it does not use phone numbers or any other identifiers, even random ones. This means that your identity, profile, contacts, and metadata are all protected from SimpleX servers and any observers. It also offers complete protection against spam and abuse, as you can only be contacted if you share a one-time invitation link or temporary user address.

SimpleX also prioritizes the ownership, control, and security of your data. All user data is stored on client devices, and messages are only temporarily held on relay servers until they are received. It also offers a decentralized proxied peer-to-peer network, allowing you to use your own relay servers and still communicate with others using SimpleX relay servers. Additionally, the code for SimpleX is fully open-source.

To connect with others on SimpleX, you can simply share a link or scan a QR code. Your profile and contacts are only stored on your device, and relay servers do not have access to this information. All messages are end-to-end encrypted using a quantum resistant double-ratchet protocol and are delivered through relay servers using the SimpleX Messaging Protocol.

If you have any questions or issues, you can contact the team through the app, email, or GitHub. You can also learn more about SimpleX on their website and access the source code on their GitHub repository. To stay updated, you can follow SimpleX on various social media platforms such as Twitter, Reddit, and Mastodon.

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To send messages, make a private connection via link or QR code.

SimpleX - the first messaging network without user identifiers of any kind (not even random numbers) - 100% private by design!

Security assessment by Trail of Bits: https://simplex.chat/blog/20221108-simplex-chat-v4.2-security-audit-new-website.html

SimpleX Chat features:
- quantum resistant end-to-end encrypted messages, with editing, replies and deletion.
- disappearing messages with opt-out per contact/group.
- message reactions.
- delivery receipts, with opt-out per contact or group.
- multiple chat profiles, with hidden profiles.
- app access and self-destruct passcodes.
- incognito mode - unique to SimpleX Chat.
- end-to-end encrypted images and files.
- voice messages up to 5 minutes – also end-to-end encrypted.
- "live" messages – they update for all recipients as you type them, every few seconds - unique to SimpleX Chat.
- connect via one-time invitation links or via long-term public addresses.
- secret chat groups - only group members know the group exists and who is the member.
- end-to-end encrypted audio and video calls.
- connection security code verification, for contacts and group members – to protect from man-in-the-middle attacks (e.g. invitation link substitution).
- end-to-end encrypted push notifications (they contain only encrypted meta-data, not the actual content).
- encrypted portable chat database - you can transfer your chat contacts and history to another device.
- all local files and media are encrypted by default.
- animated images and "stickers" (e.g., from GIF and PNG files and from 3rd party keyboards).

SimpleX Chat advantages:
- privacy of your identity, profile, contacts and metadata: unlike any other existing messaging platform, SimpleX uses no phone numbers or any other identifiers assigned to the users - not even random numbers. This protects the privacy of who you are communicating with, hiding it from SimpleX platform servers and from any observers.
- complete protection against spam and abuse: as you have no identifier on SimpleX platform, you cannot be contacted unless you share a one-time invitation link or an optional temporary user address.
- full ownership, control and security of your data: SimpleX stores all user data on client devices, the messages are only held temporarily on SimpleX relay servers until they are received.
- decentralized proxied peer-to-peer network: you can use SimpleX Chat via your own relay servers and still communicate with people using pre-configured or any other SimpleX relay servers.
- fully open-source code.

You can connect to anybody you know via link or scan QR code (in the video call or in person) and start sending messages instantly - no emails, phone numbers or passwords needed.

Your profile and contacts are only stored in the app on your device - relay servers do not have access to this information.

All messages are end-to-end encrypted using open-source quantum resistant double-ratchet protocol; the messages are delivered via relay servers using open-source SimpleX Messaging Protocol.

Please send us any questions via the app (connect to the team via the app settings!), email chat@simplex.chat or submit issues on GitHub (https://github.com/simplex-chat/simplex-chat/issues)

Ream more about SimpleX Chat at https://simplex.chat

Get source code in our GitHub repo: https://github.com/simplex-chat/simplex-chat

Follow us on X/Twitter (@SimpleXChat), Reddit (r/SimpleXChat/) and Mastodon (https://mastodon.social/@simplex) for the latest updates.