Calibre Web AutomatedvsUnderstudy
Two self-hosted projects, compared on the numbers selfhost.directory tracks live: score, popularity, release cadence and setup effort.
| Calibre Web Automated | Understudy | |
|---|---|---|
| Score | 73/100 | 48/100 |
| Rank in category | #2 of 19 in Ebook Management | #110 of 209 in AI Agents |
| GitHub stars | 6 504 | 465 |
| Stars, last 30 days | +172 | — |
| Stable releases, 12 months | 9 | 0 |
| Latest release | v4.0.8 · 28 Sept 2026 | — |
| Setup | Moderate | Moderate |
| Official Docker image | Yes | No |
| License | GPL-3.0 | MIT |
| Main language | JavaScript | Typescript |
Which one should you pick?
Calibre Web Automated scores 73/100 against 48/100 for Understudy, so it is the safer default.
Calibre Web Automated ships more often: 9 stable releases in the past year, against 0 for Understudy.
Calibre Web Automated is growing faster right now (+172 stars in 30 days).
Calibre Web Automated details →Understudy details →
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