Calibrevspolar
Two self-hosted projects, compared on the numbers selfhost.directory tracks live: score, popularity, release cadence and setup effort.
| Calibre | polar | |
|---|---|---|
| Score | 83/100 | 71/100 |
| Rank in category | #1 of 19 in Ebook Management | #1 of 13 in Billing |
| GitHub stars | 26 270 | 10 436 |
| Stars, last 30 days | +261 | +157 |
| Stable releases, 12 months | 18 | 1 |
| Latest release | v9.17.0 · 23 Oct 2026 | @polar-sh/cli@3.0.0 · 16 Oct 2026 |
| Setup | Easy | Advanced |
| Official Docker image | No | No |
| License | GPL-3.0 | Apache-2.0 |
| Main language | Python | Python |
Which one should you pick?
Calibre scores 83/100 against 71/100 for polar, so it is the safer default.
Calibre ships more often: 18 stable releases in the past year, against 1 for polar.
If you want the quickest setup, Calibre is easier to run; polar needs more configuration.
Calibre details →polar details →
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