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

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Platforms

  • Mac
  • Windows
  • Linux  Native as .deb for Debian-based, Flatpak for all Distributions
  • Android
  • iPhone
  • iPad
  • Snapcraft
  • Android Auto
  • Flathub
  • F-Droid
  • Ubuntu
  • Debian
  • OpenAPK
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Signal News & Activities

Recent News

Recent activities

  • Alexander Menzel liked Signal
  • Šepot icon
    Julius-Joska added Signal as alternative to Šepot
  • tomatotomato liked Signal
  • LinuxDoge updated Signal
  • LinuxDoge updated Signal
  • keepitlocal liked Signal
  • Signal-JW icon
    keepitlocal added Signal as alternative to Signal-JW
  • humble-advisor liked Signal
  • escolhas liked Signal
  • Karl B liked Signal

Comments and Reviews

   
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
19

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
Replying to @Ariana

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

Top Negative Comment
Shark
52

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
Replying to @Shark

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.

Replying to @Shark

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

Replying to @Shark

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

coth
Replying to @Shark

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.

Matt Jansen
0
Founder at Halite

There's regular upgrades and it feels like they actually care about security. It also works on all of my devices, and in more recent times they have enabled message syncing with new devices from conversation backups.

Review from a new or low-activity account — shown here, but not counted in the app rating.
JuanClaude
1

Not a fully open source and decentralized messaging. Just use tox or any soft with recent updates & P2P messaging. Maybe Retroshare or others too. . Edit 11/08/26: My bad, it's not fully decentralized from what i understand. But it's open source. From what i knew, it has been partially closed source before and most probably opened fully it's sources throughout the years. A quick search helped by ai directed me to this post, who seems very well done by proton (same enterprise as proton vpn/mail/etc ...) \[https://proton.me/blog/is-signal-safe\](https://proton.me/blog/is-signal-safe) Other alternatives who seems worth checking out to escape the centralized open source (and not free) tech: Session (seems to be a good fork of signal), Matrix (Check element also, who uses matrix but has more of a centralized and simple approach). Basically, just tinker and use the filters from the alternative to website to find an app alternative to signal with theses filters: all open source, f-droid, linux, android, iphone, mac, windows. And always be careful that even if it's open source, it doesn't mean it's automatically libre and decentralized. And yes, i know, the apps cannot be filtered with that many filters on alternative to. And yes, it's a shame but, as frank sinatra and the frenchies once said: that's life ! For what is worth, i still think it must be better for the security of everyone to have a decentralized AND libre AND open source messaging. A centralized mean of communication is always a risk, what if Trump or any other chief (dictators, elected or not) simply decide to seize the servers, even if they don't fully have the rights to do so ? Viva libre, viva decentralization, libre internet shall never die !

blaine hines
0
Manager at Aither

I’ve been using Signal for years, and I still think it’s the gold standard for private messaging. What I love most is its simplicity—no gimmicks, no ads, just rock-solid end-to-end encryption that works effortlessly. I also deeply appreciate Signal’s commitment to open-source transparency and its refusal to compromise user data.

That said, I’ve recently started experimenting with ETHOS for quick, ephemeral conversations. What fascinates me about ETHOS is its radically different approach: no phone number, no account, and no sign-up—just a browser-based, quantum-safe chat that starts with a shared "peer ticket." It’s not a Signal replacement (and it’s still experimental), but for situations where I want to chat without linking anything to my identity, it’s an intriguing tool to have in my back pocket. For my daily driver, though? Signal remains unbeatable.

Eden
Replying to @blaine hines

I don't see ETHOS in the alternativeto.net list. Do you have a link?

Review from a new or low-activity account — shown here, but not counted in the app rating.
trollbasics
-1
trollbasics
1

“Trust me, bro, i just like need your mobile number for privacy”

Sus

Not having my mobile number is better privacy

7 of 77 comments

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Official Links

Install from the command line

  • winget install -e --id OpenWhisperSystems.Signal
  • brew install --cask signal
  • flatpak install flathub org.signal.Signal

Be careful what you paste into a terminal. Check what a command installs before running it.

What is Signal?

Signal is a communication platform that ensures privacy and security. It supports various communication modes like video calls (up to 8 participants), messages, images, videos, documents, voice recordings, GIFs, contact and location sharing, and group chats. Signal's servers do not access or store user data. The platform's features include text and voice messaging, photo, video, GIF, and file sharing, all free of charge. It uses your phone's data connection, eliminating SMS or MMS, and offers high-quality voice and video calls. Users can also enhance conversations with encrypted stickers and custom sticker packs. Signal is ad-free, with no affiliate marketers or tracking. Push notifications inform users of new messages, even in case of battery drain or service loss. Signal's source code is available on GitHub, showcasing its transparency. The technology, developed by Open Whisper Systems, is used by millions globally.

Signal Videos

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Signal information

  • Developed by

    US flagSignal Technology Foundation
  • Licensing

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

    Average rating of 4.5 (101 ratings)
  • Alternatives

    265 alternatives listed
  • News

    28 news article related to Signal
  • Badge

    Get an embeddable badge for 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 & Communications, Security & Privacy, File Sharing, Video & Movies

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Our users have written 77 comments and reviews about Signal, and it has gotten 1497 likes

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