SimpleX Chat

SimpleX Chat

About this app

SimpleX - the first messaging platform that has no user identifiers of any kind - 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:
- end-to-end encrypted messages, with 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, with hidden profiles.
- app access and self-destruct passcodes.
- incognito mode - unique to SimpleX Chat.
- sending 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.
- single-use and long-term user addresses.
- secret chat groups - only group members know it 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).
- private instant notifications.
- encrypted portable chat database - you can transfer your chat contacts and history to another device.
- 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 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 [e-mail] or submit issues on GitHub (https://github.com/simplex-chat/simplex-chat/issues)

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

Ratings and reviews

SimpleX Chat is exactly what a messaging app should be: fast, reliable, and respectful of user privacy. The app runs smoothly without any lag or crashes, and all features work as expected. The interface is clean and intuitive, making it easy to navigate and use daily. The developers clearly prioritize performance and user experience, and it shows. Keep up the excellent work — this is the gold standard for secure, no-nonsense messaging.

Don't forget to flip the Play Integrity API switch on, champ. Nothing says user privacy than remaining compliant to Google. As long as those download analytics continues to rise, then who cares about security, right?

everything that i need in a texting app!! i would just like if there was an option to change reaction emojis to my preferences, other than that no complaints whatsoever🙏

What’s new

New in v6.5.2.

Public channels:
- Reliability: many relays per channel.
- Ownership: you can run your own relays.
- Security: owners hold channel keys.
- Privacy: for owners and subscribers.

Easier to invite your friends.

Opt-in to send link previews.

Non-profit governance: to make SimpleX Network last.

v6.5.2: deleting messages from channel history without time limit.

Read more: https://simplex.chat/blog/20260430-simplex-channels-v6-5-consortium-crowdfunding-freedom-of-speech.html