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Publishing · head to head

Calibre vs Koha

Calibre logo

Calibre

Publishing

Ebook library management and format conversion

From
Free
Rated
-
Full reviewWebsite
Koha logo

Koha

Libraries

The world's first free and open source library system

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Calibre the interface is dense and widely described as unintuitive, with a great deal exposed at once; Koha no pricing published; Koha is free and open source with no commercial licensing fee
  • They diverge on capability: Calibre covers Format conversion, Koha covers Circulation management.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Calibre and Koha actually diverge.

Attributes where Calibre and Koha differ
AttributeCalibreKoha
Pricing modelOpen source, no licence feeopen-source
PlatformsWindows, macOS, LinuxWeb, Api
CategoryPublishingLibraries
FoundedUnknown1999

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Calibre

  • Format conversion
  • Library management
  • Device sync
  • Content server

Only in Koha

  • Circulation management
  • MARC21/UNIMARC cataloging
  • Acquisitions
  • Serials management
  • Patron management
  • OPAC with faceted search
  • Reports and statistics
  • Z39.50 support

What people use each for

The jobs each tool is most often brought in to do.

Calibre

  • Converting books between formats for different e-readersnot Koha
  • Managing a large ebook library with proper metadatanot Koha
  • Authors preparing files for several storefrontsnot Koha

Koha

  • Libraries self-hosting an open source integrated library system for cataloging and circulation without vendor licensing feesnot Calibre

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Calibre

  • The interface is dense and widely described as unintuitive, with a great deal exposed at once
  • Conversion between formats is imperfect, and complex layouts degrade
  • Cannot remove DRM, so purchased books from most stores will not convert without third-party plugins
  • Heavy for someone who only wants to read rather than manage a library

Koha

  • No pricing published; Koha is free and open source with no commercial licensing fee

Pricing, plan by plan

Calibre

Free
  • CalibreFree
    • Full functionality
    • Commercial use permitted
    • Community support

Koha

Free
  • Self-HostedFree
    • Full ILS functionality
    • Circulation management
    • Cataloging (MARC21/UNIMARC)
  • Hosted (via partners)$150/month
    • Everything in Self-Hosted
    • Managed hosting
    • Professional support

Which should you pick?

Choose Calibre if

  • You need format conversion.
  • You want to start without paying.
  • You work on Windows, macOS, Linux.
  • You also want library management.
Calibre review

Choose Koha if

  • You need circulation management.
  • You want to start without paying.
  • You work on Web, Api.
  • You also want marc21/unimarc cataloging.
Koha review

Questions people ask

Is Calibre or Koha better?
Neither clearly leads. Calibre starts at Free and Koha at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Calibre or Koha?
Calibre starts at Free and Koha at Free.
Does Calibre or Koha run on more platforms?
Calibre runs on Windows, macOS, Linux. Koha runs on Web, Api.
Can I use Calibre for free?
Both have a free tier, so you can try either at no cost before committing.
What is Calibre best used for?
Calibre is most often used for converting books between formats for different e-readers, managing a large ebook library with proper metadata, authors preparing files for several storefronts. Of those, converting books between formats for different e-readers and managing a large ebook library with proper metadata are not what Koha is typically brought in for.
What can Calibre do that Koha cannot?
Calibre covers Format conversion, Library management, Device sync, Content server. Koha covers Circulation management, MARC21/UNIMARC cataloging, Acquisitions, Serials management.

Answered from the vendors’ own pages

Calibre: Is Calibre free?

Yes, open source under the GPL.

Koha: How much does Koha cost?

Koha is free and open source. There is no software licensing fee. Development is sponsored by libraries, volunteers, and support companies worldwide.

Source
Calibre: Can Calibre convert DRM-protected books?

No. It does not remove DRM, so most store-purchased books cannot be converted with Calibre alone.

Koha: Are there paid support options available?

While no specific pricing is detailed on the main site, Koha mentions paid support options available from support companies, but exact costs require contacting providers directly.

Source
Calibre: Does it work with Kindle?

Yes, it transfers to Kindle and most other e-readers and converts to the formats they use.

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