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)

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

Ratings and reviews

I like the mechanism. I think, despite being against the username concept, the simplex addresses should be something shorter you can write on paper or skin w/ marker easily. It could have another top layer that can connects the full simplex address to a short number or handle(maybe DNS) That way you can optionally easily share, and if your name gets burned for spam requests or something, you can ditch it (and your simplex address) but connections still can contact you.

SimpleX has improved a lot since it first came out. UI, desktop apps, sending messages faster... Let's see what the future brings, great app. The developer is also motivated.

Me just lobe it! Hope more people will use it. Only thing irritates me is, for example, you opened the settings in app and close the app directly (means, not by pressing back button), when you open the app again it opens to the same screen (in this case, settings). It should open to the home screen regardless of which page was open before closing. I hope it's not confusing. 😳 Also, no emojis/gif insertion tab, have to use keyboard one and it says, "SimpleX doesn't allow image insertion here".🥹

What's new

New in v5.5.1-3:
- fixes!

New in v5.5:
- private notes - with encrypted files.
- paste link to connect - search accepts SimpleX links.
- optional history in groups.
- improved message delivery, reduced battery usage.
- reveal secrets by tapping.
- allow deleting the last profile.
- Hungarian and Turkish UI
- fixes!

Read more: https://simplex.chat/blog/20240124-simplex-chat-infrastructure-costs-v5-5-simplex-ux-private-notes-group-history.html