Calibre-Web vs Readarr
A side-by-side comparison of two self-hosted e-books & media library options — licensing, setup difficulty, resource needs, and what each one replaces.
Calibre-Web
Web app to browse and read your Calibre library
VS
Readarr
Archived
E-book and audiobook collection manager
| Feature | Calibre-Web | Readarr |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 95 · Excellent | 15 · At risk |
| Status | Actively maintained | Archived |
| Category | E-books & Media Library | E-books & Media Library |
| License | GPL-3.0 | GPL-3.0 |
| Language | Python | C# |
| Setup difficulty | Easy | Medium |
| Min. RAM | 256 MB | 512 MB |
| Deployment | docker | docker, binary |
| GitHub stars | ★ 18,232 | ★ 3,468 |
| First released | 2017 | 2020 |
| Replaces | Kindle, Goodreads | Goodreads, Audible |
What are Calibre-Web and Readarr?
Calibre-Web
Calibre-Web is a web application that provides a clean interface to browse, read, and download books from an existing Calibre library. It targets users who want web access to their e-book collection. It is deployed via Docker.
- Web interface for Calibre libraries
- In-browser e-book reader
- Send to Kindle support
- OPDS feed for apps
Readarr
Readarr is an e-book and audiobook collection manager that automates organizing and acquiring titles, in the Servarr family. It targets users automating their reading library. It is deployed via Docker or binaries.
- Automated library management
- Author and series tracking
- Integrates with download clients
- Servarr-family UI
Calibre-Web vs Readarr: key differences
The biggest difference is maintenance: Readarr's repository is archived and no longer developed, while Calibre-Web is actively maintained. Calibre-Web is written in Python, while Readarr is built with C#. Calibre-Web is the lighter option, starting around 256 MB of RAM against 512 MB for Readarr. Calibre-Web is the more established project (first released 2017), while Readarr arrived in 2020. Calibre-Web has the considerably larger community, at 18,232 GitHub stars versus 3,468.
Why pick each one
Choose Calibre-Web if…
- Great companion to Calibre
- Multi-user access
- Lightweight
Watch out for
- Needs an existing Calibre library
- Not a metadata manager itself
Choose Readarr if…
- Automates collection
- Familiar Servarr interface
- Good metadata tracking
Watch out for
- Project entered retirement
- Metadata sources are limited
Frequently asked questions
Is Calibre-Web or Readarr better?
Calibre-Web is the stronger all-round pick: it has both the larger community and the simpler easy setup. Consider Readarr if its specific feature set fits your needs better.
Are Calibre-Web and Readarr free and open-source?
Yes. Calibre-Web is licensed under GPL-3.0 and Readarr under GPL-3.0. Both can be self-hosted at no software cost.
Can I run Calibre-Web and Readarr with Docker?
Calibre-Web: yes. Readarr: yes.
Which is lighter on resources, Calibre-Web or Readarr?
Calibre-Web has the smaller minimum footprint at 256 MB of RAM, compared to about 512 MB for Readarr. Real-world usage depends on library size, user count, and enabled features.