SimpleX Chat
What makes SimpleX different?
• No phone numbers, email addresses, or any other user identifiers – the platform never knows who you are.
• Every conversation is end‑to‑end encrypted by default, using an open‑source double‑ratchet protocol.
• All data lives on your device; relay servers only forward messages briefly and never see your contacts or history.
Core Features
• Secure messaging – edit, reply, delete, and set messages to disappear (opt‑out per contact or group).
• Live typing – text updates for all recipients in real time, a capability unique to SimpleX.
• Reactions & receipts – add emoji reactions and see delivery status, with per‑contact opt‑out.
• Multiple profiles – keep hidden or public profiles and switch between them instantly.
• Incognito mode – a special session that leaves no trace on the device.
• Media support – send encrypted photos, files, animated GIFs, stickers, and voice notes up to 5 minutes.
• Calls – fully encrypted audio and video calls, protected by connection‑code verification to block man‑in‑the‑middle attacks.
• Secret groups – groups that exist only for members; no one else can discover them.
• Portable chat database – export your contacts and history and import them on a new device.
Why Choose SimpleX?
• Absolute privacy – because there is no identifier, nobody (not even SimpleX) can link you to your contacts or metadata.
• Spam‑free experience – you can be reached only via a one‑time invitation link or a temporary address you choose to share.
• Full ownership – your messages are stored locally; the network merely relays them.
• Decentralised, peer‑to‑peer – run your own relay server or use any existing one and still communicate seamlessly.
• Open‑source transparency – the entire codebase is publicly auditable (audit by Trail of Bits available).
Getting Started
• Install the app on your device.
• Create a profile; no phone number or password is required.
• Share a QR code or invitation link with a friend (in‑person, video call, or any channel).
• Start chatting instantly—your contacts and messages stay only on your device.
Support & Resources
• Security audit – Trail of Bits report: https://simplex.chat/blog/20221108-simplex-chat-v4.2-security-audit-new-website.html
• Source code – https://github.com/simplex-chat/simplex-chat
• Help – contact the team through the app’s settings, email chat@simplex.chat, or file issues on GitHub.
• Stay updated – follow SimpleX on Reddit (r/SimpleXChat), Twitter (@SimpleXChat), and Mastodon (https://mastodon.social/@simplex).
SimpleX Chat: privacy built in, not added on
• Discover a messaging world where your identity, conversations, and data belong solely to you.
FAQ
Q: How does SimpleX ensure that my identity stays private?
A: Because the platform never collects or stores any user identifiers, there is nothing that can link you to your contacts or metadata—not even SimpleX itself. You are reachable only through a one‑time invitation link or a temporary address you choose to share, which keeps spam and unwanted tracking at bay.
Q: What encryption does SimpleX use for messages and calls?
A: All messages are protected by an end‑to‑end double‑ratchet protocol that provides forward secrecy and future secrecy. Audio and video calls are also fully encrypted and verified with a connection‑code exchange to prevent man‑in‑the‑middle attacks
Q: Where is my chat data stored, and can relay servers see it?
A: Your messages, media, and contact list are stored exclusively on your device. Relay servers act only as temporary forwards; they never retain or inspect the content of your conversations, your contacts, or any metadata.
Version History
v7.1.0-beta.3——17 Sep 2026
Private & e2e encrypted messenger without user identifiers - private by design! Download the latest version of SimpleX Chat to enjoy new features and updates immediately!
*7.1.0-beta.3
Minor bug fixes and improvements. Install or update to the newest version to check it out!
*7.1.0-beta.2
Minor bug fixes and improvements. Install or update to the newest version to check it out!
*7.0.2
Minor bug fixes and improvements. Install or update to the newest version to check it out!
