Signal icon
Signal icon

Signal

An open-source messaging app emphasizing privacy with encrypted communication. Share texts, calls, photos, and videos without ads or trackers, available across major platforms. Developed by Signal Technology Foundation and praised globally for security measures.

Signal screenshot 1

Cost / License

  • Free
  • Open Source

Platforms

  • Mac
  • Windows
  • Linux  Native as .deb for Debian-based, Flatpak for all Distributions
  • Android
  • iPhone
  • iPad
  • Flathub
  • Ubuntu
  • Debian
  • Snapcraft
4.4
Very Good98 reviews
1353likes
67comments

Features

Suggest and vote on features

Properties

  1.  Privacy focused
  2.  Security-focused
  3.  Lightweight

Features

  1.  End-to-End Encryption
  2.  Encrypted Chat
  3.  Ad-free
  4.  Video Calling
  5.  Self Destructing Messages
  6.  Private messaging
  7.  No Tracking
  8.  Encrypted Connection
  9.  Mobile friendly
  10.  Dark Mode
  11.  Desktop Application
  12.  Secure Chat
  13.  Stickers
  14.  Based on phone number
  15.  GPLv3
  16.  Protected by Password
  17.  VoiP Calls
  18.  Encrypted VoIP calls
  19.  Client side encryption
  20.  Cross-Platform
  21.  Forward Secrecy
  22.  Encrypted calls
  23.  Voice messages
  24.  Usernames
  25.  Multiple languages
  26.  Share Videos
  27.  Expiring Stories
  28.  Support for @mentions
  29.  Support for MarkDown
  30.  Picture in Picture
  31.  Works Offline
  32.  International Numbers
  33.  Over the shoulder view
  34.  Built-in Photo editor
  35.  Voice Chat
  36.  Centralized model repository
  37.  File Sending
  38.  Voting
  39.  Non profit
  40.  Source code history
  41.  Quantum-Safe Encryption
  42.  Animated stickers
  43.  Electron based
  44.  Team Messaging
  45.  Text messaging
  46.  Support ZRTP
  47.  Private Chat
  48.  Integrated File Sharing
  49.  Color coding

 Tags

Signal News & Activities

Highlights All activities

Recent News

Show more news

Recent activities

  • jacob-haimes liked Signal
  • sebastianpaczoski updated Signal
  • AltRazel, sebastianpaczoski, mahidulhq and DeeJayLSP liked Signal
  • CrossDaemon27, iamthunder, git-legend and jpeq liked Signal
Show all activities

Comments and Reviews

   
 Post comment/review
Comment summary: Signal is widely praised for its top-level security, and privacy features, including end-to-end encryption and it being open source. Users appreciate its ease of use and multi-platform availability. However, some concerns are raised about requiring a phone number, no SMS support, and reliance on proprietary libraries. Critics note signal's centralized server and limited distribution channels as drawbacks. Overall, Signal is a preferred privacy-centric messaging app despite some minor concerns.
Top Positive Comment
Ariana
18

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 an opportunity to use it without a phone number. This is the only thing I don't like because you can't stay anonymous when using Signal.

Marcio Wilford

I have never heard about it! But i'm gonna try it

Top Negative Comment
Shark
51

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 and Google Play Services. He does everything he can to shutdown alternative modes of distribution. I would read this before installing and contributing to Signal's userbase, especially if open source and/or F-Droid are things you care about.

Eden

I am not an expert but i appreciate the thought that you put into your criticism. Most importantly i appreciate the alternatives that you listed. I'm checking into Tox right now.

Sam Lander

Technically, F-droid is less secure than Google Play. The most secure way to download would be from the source at Github.

Sam Lander

If someone is worried about Google Play, just load GrapheneOS or CalyxOS on their Android.

coth

F-Droid is not a binary distribution, like Google Play. It builts releases from sources - from GitHub, GitLab etc etc. So it is much safer than Google Play.

BadGuyJefe
0

Signal is awesome, but would be a little better without a phone number so you could be anonymous but for a free way to get fully encrypted communication I am a big fan.

Review by a new / low-activity user.
Amalgamis
0

Best messenger for now

Gwrvan Barré
1

Much better than WhatsApp.

Masaki_isago
1

Heya ! this app is way better than a lot of the services out there. would love to see more people use it though. I cannot recommend it enough

TBayAreaPat
0

The Desktop App adds itself to startup, and only appears to pop up a QR code.

Show more comments
7 of 67 comments

Featured in Lists

For many the Internet is Google: Search, mail, videos, web browser, cloud services, mobile OS, etc. – Google is the …

List by Paul with 30 apps, updated

## WHAT IS F-DROID ? F-Droid is an awesome app repository for FOSS (Free & Open Source Software) android apps. …

List by Darlene Sonalder with 305 apps, updated

UI = User Interface UX = User eXperience Most open source apps offer out-dated or classic material design UI. If the …

List by Darlene Sonalder with 189 apps, updated

What is Signal?

Using Signal, you can communicate instantly with your relatives without making a compromise on privacy or security. Make video calls, send messages, pictures, videos, documents, voice recordings, GIFs, contacts & location, create groups so that you can chat in real time with all your friends at once and react to their messages with emojis -all with complete privacy-. Signal servers never have access to any of your communications and never store any of your data.

  • Say Anything - Share text, voice messages, photos, videos, GIFs and files for free. Signal uses your phone's data connection so you can avoid SMS (No longer supports SMS or MMS) and MMS fees.
  • Speak Freely - 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. No kidding. - There are no ads, no affiliate marketers, and no creepy tracking in Signal. So focus on sharing the moments that matter with the people who matter to you.
  • 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.
  • 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.

Signal Videos

Show 2 more videos

Signal information

  • Developed by

    US flagSignal Technology Foundation
  • Licensing

    Open Source (GPL-3.0) and Free product.
  • Rating

    Average rating of 4.4 (98 ratings)
  • Alternatives

    215 alternatives listed
  • News

    22 news article related to Signal
  • Supported Languages

    • English
    • Afrikaans
    • Albanian
    • Arabic
    • Azerbaijani
    • Basque
    • Bengali
    • Bosnian
    • Bulgarian
    • Burmese
    • Khmer
    • Catalan; Valencian
    • Croatian
    • Czech
    • Danish
    • Dutch
    • Estonian
    • Finnish
    • French
    • Galician
    • German
    • Greek
    • Gujarati
    • Hausa
    • Hebrew
    • Hindi
    • Hungarian
    • Icelandic
    • Indonesian
    • Irish
    • Italian
    • Japanese
    • Javanese
    • Kannada
    • Kazakh
    • Korean
    • Latvian
    • Lithuanian
    • Macedonian
    • Malay
    • Malayalam
    • Marathi
    • Norwegian Bokmål
    • Pashto, Pushto
    • Persian
    • Polish
    • Portuguese
    • Panjabi, Punjabi
    • Romanian
    • Russian
    • Serbian
    • Shona
    • Slovak
    • Slovene
    • Spanish
    • Swahili
    • Swedish
    • Tamil
    • Telugu
    • Thai
    • Chinese
    • Turkish
    • Turkmen
    • Uighur, Uyghur
    • Ukrainian
    • Urdu
    • Vietnamese
    • Welsh

AlternativeTo Categories

Social & CommunicationsSecurity & PrivacyFile SharingVideo & Movies

Apple AppStore

  •   Updated 
  •   4.75 avg rating
View in AppStore

Popular alternatives

View all

Our users have written 67 comments and reviews about Signal, and it has gotten 1353 likes

Signal was added to AlternativeTo by the3rdBIT on and this page was last updated . Signal is sometimes referred to as TextSecure, RedPhone