Europe’s Open-Source Solutions: Your Guide to Transparent, Independent and GDPR-Aligned Software.

This guide is designed for anyone looking to take greater control of their digital life by choosing open-source solutions developed and maintained within Europe. It highlights projects that promote transparency, reduce reliance on non-European tech ecosystems, and align with Europe’s strong commitment to privacy and data protection. The goal is to support digital autonomy in Europe while uplifting the local developers and communities who build trustworthy, user-centric software.

EUFOSS9132
EUFOSS9132List by EUFOSS9132, last updated 
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  1. Browsers

  2. LibreWolf icon
     Like

    Privacy-focused browser with over 500 settings for enhanced security and performance, independent of Firefox, and not affiliated with Mozilla.

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • AppImageHub
    • Linux Mint
    • Arch Linux
    • Gentoo
    • Flathub
    • Fedora
    • Ubuntu
    • Debian
    • Homebrew
    • Chocolatey
    • OpenBSD
    Homeage
    Settings
  3. The Mullvad Browser is a privacy-focused web browser developed in a collaboration between Mullvad VPN and the Tor Project. It’s designed to minimize tracking and fingerprinting. You could say it’s a Tor Browser to use without the Tor Network.

    Cost / License

    • Free
    • Open Source

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • Flathub
    • Flatpak
    • Mozilla Firefox
    Mullvad Browser screenshot 1
    Mullvad Browser screenshot 1
    Mullvad Browser screenshot 2
    +1
    Mullvad Browser screenshot 3
  4. Waterfox icon
     Like

    Waterfox is an open-source, privacy-focused browser based on the popular open source browser with a red panda as a mascot. It is designed to be a drop-in replacement for said browser that offers enhanced privacy features, performance improvements, and customizability while...

    Cost / License

    • Free
    • Open Source

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • Android Tablet
    • Flathub
    Desktop
    Mobile
  5. Privacy-centric, open-source browser with unique UI features like vertical tabs, Split View, and Zen Glance, focusing on security and tranquility.

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Arch Linux
    • Flathub
    • Flatpak
    • AppImage
    Zen Browser screenshot 1
    Zen Browser screenshot 1
    Zen Browser screenshot 2
    +8
    Zen Browser screenshot 3
  6. Search Engines

  7. SearXNG icon
     Like

    SearXNG is a free internet metasearch engine which aggregates results from various search services and databases. Users are neither tracked nor profiled.

    Cost / License

    • Free
    • Open Source

    Platforms

    • Linux
    • Online
    • Self-Hosted
    • Arch Linux
    • Fedora
    • Ubuntu
    • Debian
    • Docker
    • Red Hat Enterprise Linux
    • Cloudron
    SearXNG screenshot 1
    SearXNG screenshot 1
    SearXNG screenshot 2
  8. Spot is a fork of Searx which is a metasearch engine, aggregating the results of other search engines while not storing information about its users.

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Online
    Spot Search Engine screenshot 1
    Spot Search Engine screenshot 1
    Spot Search Engine screenshot 2
    +1
    Spot Search Engine screenshot 3
  9. xPrivo Search is a 100% European, privacy-focused search engine that operates on a fully independent european index instead of relying on US Big Tech like Bing. Choose between classic web results or AI enhanced results with full European data sovereignty & privacy.

    Cost / License

    • Free
    • Proprietary

    Platforms

    • Online
    • iPhone
    • iPad
    xPrivo Search screenshot 1
    xPrivo Search screenshot 1
  10. Calendar & Email

  11. Privacy-friendly Swiss email solution with 20 GB free storage, custom domain options, contact and calendar sync, and cross-device access in a secure suite.

    Cost / License

    • Freemium
    • Open Source

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • F-Droid
    Infomaniak kMail screenshot 1
    Infomaniak kMail screenshot 1
    Infomaniak kMail screenshot 2
    +8
    Infomaniak kMail screenshot 3
  12. Calendar interface for CalDAV, enabling cross-device event sync, web editing, recurring events, Nextcloud Contacts integration, WebCal support and attendee invites.

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Online
    • Self-Hosted
    • Nextcloud
    Nextcloud Calendar screenshot 1
  13. 💌 Mail app for Nextcloud.

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Online
    • Self-Hosted
    • Nextcloud
  14. Posteo icon
     Like

    Web- and IMAP-based email service. 4GB cost 1€/month. Information is hosted on encrypted hard drives. Electricity from renewable resources is used.

    Cost / License

    • Paid
    • Open Source

    Platforms

    • Online
    Drag and drop
    Conversion view
    WYSIWYG
    +10
    Contact page
  15. Your calendar is a record of your life. Proton Calendar helps keep it private.

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • Tor
    • iPad
    Proton Calendar screenshot 1
    Proton Calendar screenshot 1
    Proton Calendar screenshot 2
    +2
    Proton Calendar screenshot 3
  16. Secure Swiss-based email with end-to-end encryption and zero third-party access. Available across devices, offering a free version to promote privacy.

    Cost / License

    • Freemium
    • Open Source

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • iPad
    • Tor
    • Flathub
    • Snapcraft
    Proton Mail screenshot 1
    Proton Mail screenshot 1
    Proton Mail screenshot 2
    +9
    Proton Mail screenshot 3
  17. Organize events with encrypted privacy, zero-knowledge and no tracking. Features include multi-device sync, multiple views, and offline support.

    Cost / License

    • Freemium
    • Open Source

    Application type

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • F-Droid
    • Thunderbird
    Tuta Calendar screenshot 1
    Tuta Calendar screenshot 1
    Tuta Calendar screenshot 2
    +4
    Tuta Calendar screenshot 3
  18. Tuta Mail icon
     Like

    End-to-end encrypted app for email, calendar, and contacts, requiring no personal data, with open source code and quantum-resistant security.

    Cost / License

    • Freemium
    • Open Source

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • iPad
    • Flathub
    • F-Droid
    • Android Tablet
    • Thunderbird
    Tuta Mail screenshot 1
    Tuta Mail screenshot 1
    Tuta Mail screenshot 2
    +1
    Tuta Mail screenshot 3
  19. Cloud Storage

  20. Cozy makes the personal cloud more accessible. Respectful of the user's privacy, Cozy simplifies daily tasks: synchronize and backup photos, automate bills downloading, manage expenses, etc. Flexible and easy to use, their Open Source platform allows users to create and...

    Cost / License

    • Freemium
    • Open Source

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • iPhone
    • Self-Hosted
    • Go (Programming Language)
    Automate the synchronisation of your files on your PC with your Cozy.
    Save your mobile pictures, they will be available on your PC and tablet.
    Share your photos and files with your friends and family.
    +4
    All your data (bills, contacts, health refunds, photos…) automatically imported ! More than 100 available providers!
Timeline of Cozy Photos View of Cozy Drive
  21. Filen icon
     Like

    Filen is a cutting-edge cloud storage provider that offers client-side, end-to-end, zero-knowledge encryption. Headquartered and operated entirely in Germany, Filen is at the forefront of combining comprehensive features with uncompromising privacy and security.

    Cost / License

    • Freemium
    • Open Source

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    Filen screenshot 1
    Filen screenshot 1
    Filen screenshot 2
    +18
    Filen screenshot 3
  22. kDrive icon
     Like

    kDrive is a Swiss online storage service that respects its users' privacy and makes storing, sharing & collaborating on files a breeze.

    Cost / License

    • Freemium
    • Open Source

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • F-Droid
    kDrive screenshot 1
    kDrive screenshot 1
    kDrive screenshot 2
    +12
    kDrive screenshot 3
  23. Koofr icon
     Like

    Koofr is a safe, secure and simple way to store, backup and share your documents, photos, videos and more. It offers up to 10 GB of free safe storage for your files with affordable upgrades and options to connect multiple cloud accounts.

    Cost / License

    • Freemium
    • Open Source

    Platforms

    • Mac
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • Windows Phone
    • iPad
    • Linux Mobile
    • Google Chrome
    • Rust
    • F-Droid
    • Software as a Service (SaaS)
    • Docker
    • Chromium
    • Mozilla Firefox
    Koofr web app
    Koofr mobile app
    Koofr mobile app
    +3
    Koofr mobile app
  24. Emphasizes privacy with end-to-end encryption, Proton Drive safely stores, synchronizes, and shares files across devices via web and mobile applications.

    Cost / License

    • Freemium
    • Open Source

    Platforms

    • Mac
    • Windows
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Tor
    Proton Drive screenshot 1
    Proton Drive screenshot 1
    Proton Drive screenshot 2
    +7
    Proton Drive screenshot 3
  25. Office

  26. Enterprise-ready on-premise suite with advanced word processing, spreadsheet, and presentation tools, maximizing interoperability and file compatibility.

    Cost / License

    • Freemium
    • Open Source

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • iPhone
    • Chrome OS
    • Android Tablet
    • iPad
    • Flathub
    • Software as a Service (SaaS)
    • Flatpak
    • Cloudron
    Collabora Office Classic screenshot 1
    Collabora Office Classic screenshot 1
    Collabora Office Classic screenshot 2
  27. CryptPad icon
     Like

    CryptPad is a private-by-design alternative to popular office tools and cloud services. All the content stored on CryptPad is encrypted before being sent, which means nobody can access your data unless you give them the keys.

    Cost / License

    • Freemium
    • Open Source

    Platforms

    • Software as a Service (SaaS)
    • Self-Hosted
    • Cloudron
    Instance homepage
    Markdown slides app
    Code/Markdown app
    +7
    Whiteboard app
  28. Disroot icon
     Like

    Disroot is a platform providing online services based on principles of freedom, privacy, federation and decentralization.

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Online
    • F-Droid
    Disroot screenshot 1
    Rainloop, with the AlternativeTo  email confirmation open
  29. Free and open-source office suite with advanced word processing, spreadsheets, presentations, vector graphics, math formula editor, and database tools.

    Cost / License

    • Free
    • Open Source

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • BSD
    • Snapcraft
    • Flathub
    • PortableApps.com
    • F-Droid
    • Flatpak
    LibreOffice Writer on Linux
    LibreOffice Calc on Linux
    Main menu (old version)
    +8
    LibreOffice Writer on Windows 7
  30. Nextcloud icon
     Like

    On-premises file sync, universal access, integrated collaboration, real-time communication with privacy and data control focus.

    Cost / License

    • Free
    • Open Source

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Self-Hosted
    • Snapcraft
    • F-Droid
    • Raspberry Pi
    • Cloudron
    • Docker Hub
    • HUAWEI AppGallery
    • Flathub
    Simple and powerful file sync & share
    Simple upload even for people who don’t have Nextcloud
    Great Android & iOS apps to sync your files.
    +3
    Very easy theming
  31. Open-source suite for editing documents, spreadsheets, presentations, forms, and PDF files with co-editing modes, plugin support, AI assistant, and integration across 40+ platforms.

    Cost / License

    • Free
    • Open Source

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • HUAWEI AppGallery
    • iPad
    • Self-Hosted
    • AppImageHub
    • Snapcraft
    • Flathub
    • Samsung Galaxy Store
    • Software as a Service (SaaS)
    • Flatpak
    • Cloudron
    ONLYOFFICE screenshot 1
    ONLYOFFICE screenshot 1
    ONLYOFFICE screenshot 2
    +7
    ONLYOFFICE screenshot 3
  32. Password Managers

  33. End-to-end encrypted manager for passwords, aliases, and unique email addresses, offering local data encryption, alias creation, and optional cloud or self-hosting.

    Cost / License

    • Free
    • Open Source

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Self-Hosted
    • Microsoft Edge
    • Google Chrome
    • Safari
    • Docker
    • Mozilla Firefox
    AliasVault screenshot 1
    AliasVault screenshot 1
    AliasVault screenshot 2
    +1
    AliasVault screenshot 3
  34. KeePass icon
     Like

    Free and open source password manager storing passwords in a local encrypted database with strong AES or Twofish encryption and master key access.

    Cost / License

    • Free
    • Open Source

    Platforms

    • Mac
    • Windows
    • Linux
    • BSD
    • Mono
    Entry Templates Plugin
    Main window
    Login Screen
    +5
    Built-in Password Generator
  35. KeePassXC icon
     Like

    Open-source password manager storing passwords, notes, and attachments offline with AES-256 encryption, browser extensions, cross-platform support, and TOTP.

    Cost / License

    • Free
    • Open Source

    Platforms

    • Mac
    • Windows
    • Linux
    • AppImageHub
    • Snapcraft
    • Microsoft Edge
    • Google Chrome
    • Flathub
    • PortableApps.com
    • Flatpak
    • Homebrew
    • Chocolatey
    • Mozilla Firefox
    Welcome Screen
    Unlock Database
    New Database Wizard
    +13
    New Database Wizard
  36. Nitrokey icon
     Like

    USB security device for encryption, digital signing, and secure login, featuring secret key storage, user PIN, tamper-proof smart card, and open source design.

    Cost / License

    • Paid
    • Open Source

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Flathub
    Nitrokey screenshot 1
    Nitrokey screenshot 1
  37. Passbolt icon
     Like

    Passbolt is an open source password manager for teams. It allows to securely share and store credentials. For instance, the wifi password of your office, or the administrator password of a router, or your organisation social media account password, all of them can be secured...

    Cost / License

    • Freemium
    • Open Source

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • iPhone
    • Self-Hosted
    • Microsoft Edge
    • Google Chrome
    • Software as a Service (SaaS)
    • Mozilla Firefox
    Passbolt screenshot 1
    Passbolt screenshot 1
    Passbolt screenshot 2
    +2
    Passbolt screenshot 3
  38. A password manager that ensures identity and password security with rigorous, end-to-end encryption, built by scientists from CERN, and recommended by the United Nations.

    Cost / License

    • Freemium
    • Open Source

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Google Chrome
    • Flathub
    • Safari
    • F-Droid
    • Mozilla Firefox
    • Snapcraft
    Proton Pass screenshot 1
    Proton Pass screenshot 1
    Proton Pass screenshot 2
    +3
    Proton Pass screenshot 3
  39. Notes

  40. Cryptee icon
     Like

    Cryptee is a safety and privacy focused, encrypted and cross-platform personal data storage service. You can write personal documents, notes, journals, store photos (including raw photos from DSLR cameras) and all sorts of other files.

    Cost / License

    • Freemium
    • Open Source

    Platforms

    • Online
    • Software as a Service (SaaS)
    Cryptee screenshot 1
    Cryptee screenshot 1
    Cryptee screenshot 2
    +15
    Cryptee screenshot 3
  41. Joplin icon
     Like

    Open source note-taking app with Markdown support, to-do integration, and synchronization with cloud services like Dropbox and OneDrive.

    Cost / License

    • Freemium
    • Open Source

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Self-Hosted
    • AppImageHub
    • Snapcraft
    • Google Chrome
    • Flathub
    • PortableApps.com
    • F-Droid
    • Cloudron
    • Homebrew
    • Chocolatey
    • Termux
    • Mozilla Firefox
    Joplin screenshot 1
    Joplin screenshot 1
    Joplin screenshot 2
    +5
    Example
  42. Marknote icon
     Like

    Marknote lets you create rich text notes and easily organise them into notebooks. You can personalise your notebooks by choosing an icon and accent color for each one, making it easy to distinguish between them and keep your notes at your fingertips.

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Flathub
    Marknote screenshot 1
    Marknote screenshot 1
    Marknote screenshot 2
    +1
    Marknote screenshot 3
  43. Distraction-free note-taking app with categories, Markdown formatting, favorites, and RESTful API. Integrates with Nextcloud clients for seamless syncing.

    Cost / License

    • Free
    • Open Source

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Self-Hosted
    • F-Droid
    Nextcloud Notes screenshot 1
    Nextcloud Notes screenshot 1
    Nextcloud Notes screenshot 2
    +4
    Nextcloud Notes screenshot 3
  44. QOwnNotes icon
     Like

    Plain text notepad with markdown support and todo list manager for Linux, Mac OS X and Windows, that works together with the notes application of ownCloud.

    Cost / License

    • Free
    • Open Source

    Platforms

    • Mac
    • Windows
    • Linux
    • Flathub
    • PortableApps.com
    • Qt
    QOwnNotes main screen
    QOwnNotes main screen vertical layout
    QOwnNotes todo list manager
    +3
    QOwnNotes notes diff
  45. Zettlr icon
     Like

    Comprehensive writing tool for notes, citations, and drafting with privacy-first features and multi-language support, perfect for diverse writing tasks.

    Cost / License

    • Free
    • Open Source

    Platforms

    • Mac
    • Windows
    • Linux
    • Flathub
    • PortableApps.com
    Zettlr Main Window (dark mode)
    Zettlr Main Window (light mode)
    The Berlin Theme (dark mode)
    +5
    The Berlin Theme (light mode)
  46. Zim icon
     Like

    Zim brings the concept of a wiki to your desktop. Store information, link pages and edit with WYSISYG markup or directly typing some lightweight markup syntax and see it previewed as-you-type. Creating a new page is easy by either clicking on the "Create new note"...

    Cost / License

    • Free
    • Open Source

    Platforms

    • Mac
    • Windows
    • Linux
    • BSD
    • Flathub
    • Flatpak
    Zim screenshot 1
    Graphviz graph using Diagram plugin
    Formatting options available
    +1
    Hiding all toolbars and statusbar for maximum screen space
  47. Messaging & Video

  48. Uses email as a decentralized chat platform with modern interface, open source code, no central servers, strong privacy controls, and no account signup.

    Cost / License

    • Free
    • Open Source

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Snapcraft
    • Flathub
    • F-Droid
    Delta Chat screenshot 1
    Delta Chat screenshot 1
    Delta Chat screenshot 2
    +1
    Delta Chat screenshot 3
  49. Element icon
     Like

    A secure collaboration app with end-to-end encryption and interoperability across web, desktop, and mobile. Includes chat, voice, and video calls.

    Cost / License

    • Free Personal
    • Open Source

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Self-Hosted
    • Matrix.org
    • Flathub
    • F-Droid
    • Cloudron
    • Snapcraft
    Video calls for desktop and mobile
    Collaboration widgets
    Collaboration and screen sharing
    +1
    Connect with other apps
Page 1 of 3

*Loops and Pixelfed are Canadian, but they are the best FOSS alternatives to Instagram and Tiktok.

Comments

Pika Nogavicka
1

Koofr is also a great european cloud storage provider, very privacy oriented, and Bunny.net, they are both from Slovenia.

1 reply
EUFOSS9132

Thank you for the suggestions! Koofr has now been added to the list.

The list is based on two criteria:

  1. The software must be open-source
  2. The software must be European

There are no exceptions to the first criteria. For the second one, exceptions may apply in certain cases. For example if the software is developed internationally (such as LibreWolf or VSCodium) or if no European alternatives exist (e.g. Pixelfed or Loops as alternatives to Instagram and TikTok).

For this reason, Bunny.net will not be added to the list, as the software is not open-source.

SleipnirTheHorse
0

Never knew Krita was European, do you know of any specifically German open source projects?

1 reply
EUFOSS9132

Yes, Krita is actually part of the KDE ecosystem, which is a German-based FOSS community. KDE is best known for the KDE Plasma desktop (Linux), but they also develop a huge collection of applications across many categories.

Some prominent KDE apps include Kdenlive (video editing), Okular (document viewer), Gwenview (image viewer), Dolphin (file manager) and many more. All FOSS and actively developed in Europe.

Germany in general has a very strong open-source scene.

European_AlternativeTo
0

Wow, I thought that I was the only person loving European open-source projects! Maybe we need to a collaborate? Just to help you, Infomaniak isn't that privacy focused: when you sign up, you (sometimes) have to make a selfie and give a lot of personal information... In general this list looks amazing and your username is awesome. Let's go Europe!

1 reply
EUFOSS9132

Thanks! Always great to meet another person who cares about European FOSS projects

I’m definitely curious about collaboration. Did you have anything in mind? It could be anything from sharing resources, testing projects, contributing to open-source or even writing about European alternatives together.

And you’re absolutely right about Infomaniak: they’re not the most privacy-focused option out there. For me it’s a pragmatic choice right now - European jurisdiction, transparent, sustainable and very competitive pricing. I see them as a “good enough” step away from US hyperscalers, not a perfect privacy solution.

Gu