Calibre-Web vs COPS
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
COPS
Calibre OPDS and HTML PHP server
| Feature | Calibre-Web | COPS |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 95 · Excellent | 73 · Good |
| Category | E-books & Media Library | E-books & Media Library |
| License | GPL-3.0 | GPL-2.0 |
| Language | Python | PHP |
| Setup difficulty | Easy | Easy |
| Min. RAM | 256 MB | 128 MB |
| Deployment | docker | docker, bare-metal |
| GitHub stars | ★ 18,232 | ★ 134 |
| First released | 2017 | 2013 |
| Replaces | Kindle, Goodreads | Kindle |
What are Calibre-Web and COPS?
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
COPS
COPS is a lightweight Calibre OPDS and HTML PHP server that exposes a Calibre library without needing Calibre running. It targets users wanting a minimal way to share their library. It is deployed via Docker or a PHP stack.
- OPDS and HTML catalog
- Reads Calibre metadata database
- Very lightweight
- No Calibre process needed
Calibre-Web vs COPS: key differences
Calibre-Web is written in Python, while COPS is built with PHP. Licensing differs — GPL-3.0 for Calibre-Web versus GPL-2.0 for COPS. COPS is the lighter option, starting around 128 MB of RAM against 256 MB for Calibre-Web. COPS is the more established project (first released 2013), while Calibre-Web arrived in 2017. Calibre-Web has the considerably larger community, at 18,232 GitHub stars versus 134.
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 COPS if…
- Extremely lightweight
- Easy to host
- Good OPDS support
Watch out for
- Read-only catalog
- Basic interface
Frequently asked questions
Is Calibre-Web or COPS better?
Neither is universally better. Calibre-Web has the larger community; both share a easy setup difficulty, so the decision comes down to features and licensing.
Are Calibre-Web and COPS free and open-source?
Yes. Calibre-Web is licensed under GPL-3.0 and COPS under GPL-2.0. Both can be self-hosted at no software cost.
Can I run Calibre-Web and COPS with Docker?
Calibre-Web: yes. COPS: yes.
Which is lighter on resources, Calibre-Web or COPS?
COPS has the smaller minimum footprint at 128 MB of RAM, compared to about 256 MB for Calibre-Web. Real-world usage depends on library size, user count, and enabled features.