TextSecure and RedPhone have been merged to create Signal!

Using Signal, you can communicate instantly while avoiding SMS fees, create groups so that you can chat in real time with all your friends at once, and share media or attachments all with complete privacy. The server never has access to any of your communication and never stores any of your data.

* Say Anything - Send high-quality group, text, picture, and video messages, all without SMS and MMS fees.
* Speak Freely - Make crystal-clear phone calls to people who live across town, or across the ocean, with no long-distance charges.
* Be Yourself - Signal uses your existing phone number and address book. There are no separate logins, usernames, passwords, or PINs to manage or lose.
* Stay Secure - We cannot hear your conversations or see your messages, and no one else can either. No exceptions. You can even tap and hold on a contact's name to see advanced identity verification options. Everything in Signal is always end-to-end encrypted and painstakingly engineered in order to keep your communication safe.
* Go Fast - Signal is optimized for speed without compromise. Our state-of-the-art Axolotl protocol is unmatched in its performance, strength, and reliability.
* Remain Connected - Push notifications let you know when new messages have arrived, and they'll be waiting for you even if your battery dies or you temporarily lose service.
* Get Organized - Unique archive functionality makes it easy to keep track of the conversations that matter to you right now.
* Pay Nothing - Signal is supported by a team of dedicated developers, community donations, and grants. There are no advertisements, and it doesn't cost anything to use.
* View Source - All of our code is free, open, and available on GitHub (https://github.com/signalapp ).
* Join Movements - Technology developed by Open Whisper Systems is trusted and used by millions of people around the world every day.



Supported Platforms 2 notes on Signal's platform support

Mac Windows Linux Android iPhone Android Tablet iPad Google Chrome Ubuntu Touch

Platform comments

  • Linux “Debian-based distros only”
  • Google Chrome “Beta.”

Links to official Signal sites

Official Website    Twitter    GitHub


Ad-free Chat Client side encryption Color coding Electron based Encrypted calls Encrypted chat Encrypted Connection Encrypted VoIP calls End-to-End Encryption Forward Secrecy Group chat Group Messaging Integrated File Sharing Mobile friendly Night mode/Dark Theme Works Offline Protected by Password Based on phone number Privacy focused Privacy-friendly Private messaging Security & Privacy Security focused Self destructing messages File Sending SMS Messaging Video calling Voice Call Voice chat Voice messages Add a feature


File Sharing Security & Privacy Social & Communications


always-running contacts-integration desktop-application encrypt-text encrypt-voice instant-messaging privacy-protection secure-messaging smartphone-messaging strong-encryption typing-indicator video-chat-encrypted zrtp


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3.6 out of 5 with 15 ratings

ReviewsView all

I love Signal because of the automatic end-to-end encryption. Even though Whatsapp now has that, too, I still prefer Signal because it's more transparent about key handling. I would love them to add...

See why people like Signal 😍

Regardless of who endorses him, Moxie is hostile to anyone that threatens his control over the project. He also has a very high opinion of the Google Play store despite that coming with Google's ToS...

See why people do not like Signal 😡 Post your review