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calibre vs Librum

The same facts for both, read from GitHub every night, and the relation a person reviewed.

calibreLibrum
LanguagePythonC++
LicenceGPL-3.0GPL-3.0
Stars26k5.3k
Latestv9.15.0v.0.12.2
Last push2026-10-062026-04-26
Release cadenceabout 21 days between releasesabout 29 days between releases
Active contributors21+ commit authors on the default branch in the last 90 days0 commit authors on the default branch in the last 90 days
Flagsnonenone

How they relate

  • Both replace Amazon Kindle. Alternatives to Amazon Kindle →

    PartialcalibreThe library for your own DRM-free books, sent to a Kindle by email or USB, not the store.

    PartialLibrumLibrary and reader for your own books with cloud sync; there is no store.