SimpleX Chat

SimpleX Chat

SimpleX Chat - e2e encrypted messenger without any user IDs - private by design!

Connectivity Messaging Phone & SMS Voice & Video Chat

Screenshots

Screenshot of SimpleX Chat Screenshot of SimpleX Chat Screenshot of SimpleX Chat Screenshot of SimpleX Chat Screenshot of SimpleX Chat Screenshot of SimpleX Chat Screenshot of SimpleX Chat Screenshot of SimpleX Chat

Description

SimpleX - the first messaging platform that has no user identifiers, not even random numbers!

Security assessment was done by Trail of Bits in November 2022.

SimpleX Chat features:

  • end-to-end encrypted messages, with editing, replies and deletion of messages.
  • sending end-to-end encrypted images and files.
  • 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.
  • private instant notifications.
  • portable chat profile - you can transfer your chat contacts and history to another device (terminal or mobile).

SimpleX Chat advantages:

  • Full 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 network: you can use SimpleX with your own servers and still communicate with people using the servers that are pre-configured in the apps or any other SimpleX servers.

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 - our servers do not have access to this information.

All messages are end-to-end encrypted using open-source double-ratchet protocol; the messages are routed via our servers using open-source SimpleX Messaging Protocol.

Please send us any questions via the app (connect to the team via settings!), email us or submit an issue on GitHub.

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

Once you install SimpleX Chat, join the group of users via this link to share your ideas and feedback.

Versions

Version Date Size Requires Android Download
6.5.6 current
d030454d6e0ed3d4…
2026-06-24 81 MB API 26
6.5.6
1909bf9d7ea0c824…
2026-06-24 91 MB API 26
6.5.5
8c8c9807cde0002d…
2026-06-20 81 MB API 26
6.5.5
9f76cf90cbfd9d3a…
2026-06-21 91 MB API 26
6.5.4
b6b729266534e3fd…
2026-06-06 80 MB API 26
6.5.4
275a8cb744a0cb58…
2026-06-06 91 MB API 26

Permissions

What the app asks the system for. Android only grants sensitive access after you confirm it.

  • CameraTake photos and videos.
  • NotificationsShow notifications.
  • VIDEO_CAPTURE
  • MicrophoneRecord audio.
  • Audio settingsAdjust volume and audio output.
  • Foreground serviceKeep running in the background, visible in the status bar.
  • Prevent sleepingKeep the device from going to sleep.
  • Run at startupStart automatically after the device is switched on.
Show 14 more permissions
  • VibrationControl the vibration alert.
  • Internet accessSend and receive data over the internet.
  • Network stateCheck whether and how the device is connected.
  • Write storageCreate and change files on the device storage.
  • REQUEST_IGNORE_BATTERY_OPTIMIZATIONS
  • USE_FULL_SCREEN_INTENT
  • FOREGROUND_SERVICE_REMOTE_MESSAGING
  • FOREGROUND_SERVICE_MICROPHONE
  • FOREGROUND_SERVICE_CAMERA
  • FOREGROUND_SERVICE_MEDIA_PLAYBACK
  • BiometricsUnlock with fingerprint or face.
  • FingerprintUnlock with a fingerprint.
  • app.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
  • Read storageRead files on the device storage.

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