Signal is an encrypted messaging service for instant messaging, voice, and video calls. The instant messaging function includes sending text, voice notes, images, videos, and other files. Communication may be one-to-one between users, or for group messaging.
The application uses a centralized computing architecture, and is cross-platform software. It is developed by the non-profit Signal Foundation and its subsidiary, Signal Messenger LLC. This software is free and open-source.
The official Android app generally uses the proprietary Google Play Services, although it is designed to work without them. Signal is also distributed for iOS and desktop programs for Windows, macOS, and Linux. Registration for desktop use requires an iOS or Android device.
Signal uses mobile telephone numbers as identifier for users. It secures all communications with end-to-end encryption. The client software includes mechanisms by which users can independently verify the identity of their contacts and the integrity of the data channel.
The number does not have to be the same as on the device’s SIM card. It can also be a VoIP number or a landline as long as the user can receive the verification code and have a separate device to set up the software. A number can only be registered on one mobile device at a time. Account registration requires an iOS or Android device.
Share Without Insecurity
State-of-the-art end-to-end encryption (powered by the open source Signal Protocol) keeps your conversations secure. Nobody can’t read your messages or listen to your calls, even developers of this app. Privacy isn’t an optional mode – it’s just the way that app works.
Share text, voice messages, photos, videos, GIFs and files for free. Signal uses your phone’s data connection so you can avoid SMS and MMS fees.
Make crystal-clear voice and video calls to people who live across town, or across the ocean, with no long-distance charges.
Make Privacy Stick
Add a new layer of expression to your conversations with encrypted stickers. You can also create and share your own sticker packs.
Get Together with Groups
Group chats make it easy to stay connected to your family, friends, and coworkers.
No ads. No trackers.
There are no ads, no affiliate marketers, and no creepy tracking in application. So focus on sharing the moments that matter with the people who matter to you.
What’s New in Signal 6.30.0:
- This update fixes a handful of bugs, including one that caused the main Signal window to go blank if you viewed a debug log in full-screen mode on macOS. Seeing a completely Light or completely Dark window is arguably the purest possible expression of the Light Theme and Dark Theme, but we ultimately decided that the app is easier to use when you can see the interface too.
What’s New in Signal 6.29.1:
- The Chat Color customization screen is now displayed correctly across different languages and selected locales.
- We improved notification support on Windows. If you don’t click on a notification when it first arrives, the latest missed notification will appear in the Windows Notification Center. Clicking on that notification will now jump directly to that chat. We’d like to thank Julien Richard for their feedback.
What’s New in Signal 6.28.0:
- Modified the notification icons that appear for group updates, like when someone new joins a group. These icons help improve legibility, especially if you live within the darkness of the Dark Theme. The previous icons merely adopted the dark. The new icons were born in it, molded by it.
What’s New in Signal 6.27.0:
- This update includes a few improvements for voice and video calls, and some minor documentation updates
What’s New in Signal 6.26.0:
- Diacritics (such as accent marks) are now supported in @ mentions, so you can remind Aristotélēs to answer your philosophy question in the “Ancient Greek Time Travellers” group chat.
- Three cheers for triple-click text selection improvements.
What’s New in Signal 6.25.0:
- Now that the calling and conversation headers are draggable, repositioning your Signal window won’t be such a drag.
What’s New in Signal 6.24.0:
- Now you can search your @ mentions too.
What’s New in Signal 6.22.0:
- Format text in your messages by selecting any text in the message composition field. Make a bold statement that’s actually bold, send M. Night Shyamalan a twist ending with a spoiler effect, emphasize a name by writing “Alex” in italics, put a line through a rejected dinner idea with strikethrough, or share code in monospace.
- We added support for the latest emoji characters, so now you can express your excitement with “Shaking Face” () or react with a “Pea Pod” () when someone asks you how close you are to your friends.
Homepage – https://signal.org
Supported Operating Systems:
- Windows 10, 11
- macOS 10.13 and above.
- iOS 13 and higher
- Android 5.0 and higher
Size: 113 MB