Calibre vs Readflow
A side-by-side comparison of two self-hosted e-books & media library options — licensing, setup difficulty, resource needs, and what each one replaces.
Not the right match-up?
Calibre
Powerful ebook library manager with a built-in server
VS
Readflow
Track your Kobo reads on Anilist.co and Hardcover.app using
| Feature | Calibre | Readflow |
|---|---|---|
| Category | E-books & Media Library | E-books & Media Library |
| License | GPL-3.0 | MPL-2.0 |
| Language | Python | Go |
| Setup difficulty | Easy | Easy |
| Min. RAM | 512 MB | 50 MB |
| Deployment | docker, bare-metal, binary | bare-metal |
| GitHub stars | ★ 25,578 | ★ 23 |
| First released | 2006 | 2025 |
| Replaces | Kindle, Apple Books | — |
Why pick each one
Choose Readflow if…
- Released under the MPL-2.0 license
- Easy to set up — beginner-friendly
- Written in Go
- Tiny footprint — runs in 50 MB RAM
Frequently asked questions
Is Calibre or Readflow better?
Neither is universally better. Calibre has the larger community; both share a easy setup difficulty, so the decision comes down to features and licensing.
Are Calibre and Readflow free and open-source?
Yes. Calibre is licensed under GPL-3.0 and Readflow under MPL-2.0. Both can be self-hosted at no software cost.
Can I run Calibre and Readflow with Docker?
Calibre: yes. Readflow: check the project docs for container support.