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Threema Alternatives for Linux

Threema is not available for Linux but there are plenty of alternatives that runs on Linux with similar functionality. The best Linux alternative is Signal, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Threema and many of them are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to Threema are Telegram, Element, Slack and Tox.

Threema alternatives are mainly Encrypted Chat Apps but may also be Group Chat Apps or Instant Messengers. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Threema.
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  • Android
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Threema is a new mobile messaging app that puts security first. With true end-to-end encryption, you can rest assured that...

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  1. Signal is a messaging app with an unexpected focus on privacy, combined with all the features expected from a modern IM app. Signal has received a lot of praise from all around the world for its security and privacy-respecting technologies.

    ⚫︎ End-to-End EncryptionSignal has E2E Encryption, for entire or parts of the app.
    ⚫︎ Privacy focusedSignal is considered a privacy friendly alternative.
    ⚫︎ Ad-freeSignal doesn't contain any form of external advertising.
    ⚫︎ Self destructing messagesSignal supports the use of private messages that will be auto deleted according to a specified time or action.
    ⚫︎ Dark ModeSignal supports dark mode for comfortable usage in low light conditions.
    ⚫︎ Works OfflineSignal can be used without the need to connect to the internet.
    ⚫︎ No TrackingSignal will not track or use your personal data.
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    Signal vs Threema opinions
    Almost everyone thinks Signal is a great alternative to Threema.

    Independent and good cryptography.

    Positive comment ago
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    2
  2. Telegram icon

    Telegram

    • FreemiumProprietary
    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • HUAWEI AppGallery
    • Windows Phone
    • iPad
    • Apple Watch
    • Linux Mobile
    • Android Wear
    • PortableApps.com
    • FreeBSD

    Telegram is a messaging app created by former VK creators with a focus on speed and security. It’s superfast, simple and free. It is like SMS, but more powerful.

    ⚫︎ LightweightTelegram consumes less device resources compared to similar apps.
    ⚫︎ Ad-freeTelegram doesn't contain any form of external advertising.
    ⚫︎ End-to-End EncryptionTelegram has E2E Encryption, for entire or parts of the app.
    ⚫︎ Privacy focusedTelegram is considered a privacy friendly alternative.
    ⚫︎ Dark ModeTelegram supports dark mode for comfortable usage in low light conditions.
    ⚫︎ PortableTelegram can be used from a USB stick or similar with no prior installation.
    ⚫︎ Works OfflineTelegram can be used without the need to connect to the internet.
    ⚫︎ Multiple Account supportTelegram support multiple accounts without the need to logout and login
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    Telegram Desktop
    Telegram vs Threema opinions
    Some users think Telegram is a great alternative to Threema, some don't.

    Cloud data instead of private data

    Negative comment ago
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  3. Element icon

    Element

    • FreemiumOpen Source
    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Self-Hosted
    • Matrix.org
    • Cloudron
    • F-Droid
    • FLATHUB

    Element is a secure collaboration and messaging app based on the Matrix protocol. It’s decentralised to deliver digital sovereignty, and based on an open standard for easy connections and interoperability. It is end-to-end encrypted by default.

    ⚫︎ DecentralizedElement is based on a decentralized infrastructure with no single entity controlling it.
    ⚫︎ End-to-End EncryptionElement has E2E Encryption, for entire or parts of the app.
    ⚫︎ Privacy focusedElement is considered a privacy friendly alternative.
    ⚫︎ File VersioningElement has a version system that lets you view and go back to older versions of the project/file/document.
    ⚫︎ Support for MarkDownElement supports MarkDown for document formatting.
    ⚫︎ No TrackingElement will not track or use your personal data.
    ⚫︎ Real time collaborationMultiple users can work together in Element simultaneously.
    ⚫︎ DRM FreeNo Digital rights management (DRM), i.e. no copy protection.
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    Video calls for desktop and mobile
  4. Slack icon

    Slack

    • FreemiumProprietary
    • Mac
    • Windows
    • Linux
    • Android
    • iPhone
    • Chrome OS
    • Android Tablet
    • iPad
    • Electron / Atom Shell
    • Software as a Service (SaaS)

    Slack is a unified communication platform built with an optimized workflow to keep modern teams focused and productive. A familiar chat interface facilitates discussions while advanced features are easily exposed based on context.

    ⚫︎ Extensible by Plugins/ExtensionsSlack can be extended with add-ons, plugins and extensions.
    ⚫︎ Real time collaborationMultiple users can work together in Slack simultaneously.
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    Screenshot
  5. With the rise of widespread government monitoring programs, Tox is an easy to use application that allows you to connect with friends and loved ones without anyone else listening in.

    ⚫︎ Privacy focusedTox is considered a privacy friendly alternative.
    ⚫︎ DecentralizedTox is based on a decentralized infrastructure with no single entity controlling it.
    ⚫︎ End-to-End EncryptionTox has E2E Encryption, for entire or parts of the app.
    ⚫︎ No registration requiredYou can use most of the features in Tox without registration.
    ⚫︎ Screen SharingYou can use Tox to share your screen with your colleages or friends.
    ⚫︎ Dark ModeTox supports dark mode for comfortable usage in low light conditions.
    ⚫︎ LightweightTox consumes less device resources compared to similar apps.
    ⚫︎ No TrackingTox will not track or use your personal data.
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    The Universal Tox Client. A Tox client that runs on Android, iOS, Windows, Mac OSX, Linux, FreeBSD & the web. Written in JS using React & React Native / electron.
    Tox vs Threema opinions
    pros, cons and recent comments
    Sandro_Linux

    Tox is peer to peer meaning with no relying on central servers (unlike Threema), is free (unlike Threema) and can be run through Tor (although that isn't by defualt)

    Positive comment ago
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  6. Wire icon

    Wire

    • Free PersonalOpen Source
    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Self-Hosted
    • F-Droid
    • Software as a Service (SaaS)

    Wire is the most secure collaboration platform featuring messenger, voice, video, conference calls, file-sharing, and external collaboration –all protected by the most secure end-to-end-encryption.

    ⚫︎ End-to-End EncryptionWire has E2E Encryption, for entire or parts of the app.
    ⚫︎ Screen SharingYou can use Wire to share your screen with your colleages or friends.
    ⚫︎ Privacy focusedWire is considered a privacy friendly alternative.
    ⚫︎ Multiple Account supportWire support multiple accounts without the need to logout and login
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    Screenshot
  7. Zulip is a group chat app in which messages are threaded by topic, helping you have long-running, organized conversations.

    ⚫︎ Support for MarkDownZulip supports MarkDown for document formatting.
    ⚫︎ Syntax HighlightingZulip supports syntax highlighting for various programming and markup languages.
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    Screenshot
  8. An open-source decentralized and encrypted messaging app even without internet connection via Wi-Fi and Bluetooth.

    ⚫︎ DecentralizedBriar is based on a decentralized infrastructure with no single entity controlling it.
    ⚫︎ End-to-End EncryptionBriar has E2E Encryption, for entire or parts of the app.
    ⚫︎ Works OfflineBriar can be used without the need to connect to the internet.
    ⚫︎ No registration requiredYou can use most of the features in Briar without registration.
    ⚫︎ Dark ModeBriar supports dark mode for comfortable usage in low light conditions.
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    private messages
  9. FluffyChat icon

    FluffyChat

    • FreeOpen Source
    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • FLATHUB
    • Ubuntu Touch
    • F-Droid

    FluffyChat is an open, nonprofit and cute matrix messenger app for Ubuntu Touch, Android and iOS.

    ⚫︎ DecentralizedFluffyChat is based on a decentralized infrastructure with no single entity controlling it.
    ⚫︎ End-to-End EncryptionFluffyChat has E2E Encryption, for entire or parts of the app.
    ⚫︎ Privacy focusedFluffyChat is considered a privacy friendly alternative.
    ⚫︎ Ad-freeFluffyChat doesn't contain any form of external advertising.
    ⚫︎ Dark ModeFluffyChat supports dark mode for comfortable usage in low light conditions.
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    Screenshot
  10. Wickr icon

    Wickr

    • FreemiumProprietary
    • Mac
    • Windows
    • Linux
    • Android
    • iPhone
    • Android Tablet
    • iPad

    Wickr is a free end-to-end encrypted text, video, picture and voice messenger with full sender control.

    ⚫︎ End-to-End EncryptionWickr has E2E Encryption, for entire or parts of the app.
    ⚫︎ Self destructing messagesWickr supports the use of private messages that will be auto deleted according to a specified time or action.
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    Screenshot
Showing 10 of 27 alternatives