Open Source calibre AlternativesTop Ebook & PDF Readers like calibre

The best open source alternative to calibre is KOReader. If that doesn't suit you, our users have ranked more than 100 alternatives to calibre and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to calibre are Readest, Foliate, Librera Reader and Koodo Reader.

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calibre alternatives are mainly Ebook Readers, but if you're looking for Ebook Libraries or PDF Readers you can filter on that. Other popular filters include Chrome OS, Android, Open Source, Android Tablet, Self-Hosted, Linux and Mac. These are just examples - use the filter bar below to find more specific alternatives to calibre.
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Alternatives
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Alternatives list

  1. KOReader icon

    KOReader

     87 likes

    An ebook reader application supporting PDF, DjVu, EPUB, FB2 and many more formats, running on Kindle, Kobo, PocketBook, Linux and Android devices.

    93 KOReader alternatives

    Cost / License

    Application type

    Platforms

    • Linux
    • Android
    • Android Tablet
    • AppImageHub
    • Kobo Books
    • Linux Mobile
    • Flathub
    • F-Droid
    • Kindle Fire
    • OpenAPK
    KOReader screenshot 1
    KOReader screenshot 2
    KOReader screenshot 3
    Good alternative?
     
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  2. Readest icon

    Readest

     54 likes

    Readest is a modern, open-source ebook reader for Windows, macOS, Linux, iOS, Android, and the web.

    22 Readest alternatives

    Cost / License

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Self-Hosted
    • Flathub
    • Flatpak
    • US flagUnited States
    Annotation
    Good alternative?
     
  5. Librera Reader icon

    Librera Reader

     82 likes

    Librera Reader is a highly customizable and feature-rich application for reading books in PDF, EPUB, MOBI, DjVu, FB2, TXT, RTF, AZW, AZW3, HTML, CBZ, CBR formats on Android devices.

    78 Librera Reader alternatives

    Cost / License

    • Freemium
    • Open Source

    Application type

    Platforms

    • Android
    • Android Tablet
    • F-Droid
    • OpenAPK
    • SK flagSlovakia
    • European Union flagEU
    Librera Reader screenshot 1
    Good alternative?
     
  6. Koodo Reader icon

    Koodo Reader

     77 likes

    Koodo Reader is a powerful ebook reader designed to provide a simple and easy-to-use reading experience.

    Cost / License

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • iPad
    • Flathub
    • CN flagChina
    Koodo Reader screenshot 1
    Good alternative?
     
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  8. Sigil icon

    Sigil

     130 likes

    Sigil is a multi-platform ebook editor. It is designed to edit books in ePub format.

    Cost / License

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • PortableApps.com
    • RS flagSerbia
    Book View
    Good alternative?
     
  10. Openlib icon

    Openlib

     36 likes

    Openlib is an open source app to download and read books from shadow library (Anna’s Archive). The App Has Built In Reader to Read Books.

    81 Openlib alternatives

    Cost / License

    Application type

    Platforms

    • Android
    • F-Droid
    Openlib screenshot 1
    Openlib screenshot 2
    Openlib screenshot 3
    Good alternative?
     
  11. Episteme Reader icon

    Episteme Reader

     12 likes

    Episteme Reader is an offline-first application designed for reading various document formats. It leverages native Android technologies and C++ libraries to provide a performant reading experience with customization capabilities.

    Cost / License

    Application type

    Platforms

    • Windows
    • Android
    • Android Tablet
    • F-Droid
    • Linux
    • Debian
    • Fedora
    • Arch Linux
    • IN flagIndia
    Episteme Reader screenshot 1
    Episteme Reader screenshot 2
    Episteme Reader screenshot 3
    Good alternative?
     
  12. Kavita icon

    Kavita

     30 likes

    Lightning fast with a slick design, Kavita is a rocket-fueled self-hosted digital library which supports a vast array of file formats. Install to start reading and share your server with your friends. book reader, self hosted, manga, comics, free, manhwa, e readers, electronic...

    194 Kavita alternatives

    Cost / License

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Self-Hosted
    • Cloudron
    Kavita screenshot 1
    Good alternative?
     
  13. Storyteller icon

    Storyteller

     26 likes

    Storyteller is a self-hosted platform for creating and reading ebooks with synced narration. It's made of three components: the API server, the web interface, and the mobile apps. Together, these components allow you to take audiobooks and ebooks that you already own and...

    Cost / License

    • Free
    • Open Source (MIT)

    Application type

    Platforms

    • Android
    • iPhone
    • Self-Hosted
    • Docker
    Storyteller screenshot 1
    Storyteller screenshot 2
    Storyteller screenshot 3
    Good alternative?
     
  14. Thorium Reader icon

    Thorium Reader

     23 likes

    Thorium Reader is a free, open source multi-language EPUB reader for Windows 10, MacOS and Linux. It's privacy aware and highly accessible for visually impaired and dyslexic people.

    52 Thorium Reader alternatives

    Cost / License

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • FR flagFrance
    • European Union flagEU
    Thorium Reader screenshot 1
    Good alternative?
     
12 of 49 calibre alternatives