MainsailvsSemaphore UI
Two self-hosted projects, compared on the numbers selfhost.directory tracks live: score, popularity, release cadence and setup effort.
| Mainsail | Semaphore UI | |
|---|---|---|
| Score | 65/100 | 73/100 |
| Rank in category | #3 of 22 in 3D Printing | #12 of 166 in Developer Tools |
| GitHub stars | 2 236 | 14 334 |
| Stars, last 30 days | +20 | +151 |
| Stable releases, 12 months | 8 | 20 |
| Latest release | v2.19.0 · 27 Aug 2026 | v2.18.31 · 7 Oct 2026 |
| Setup | Moderate | Easy |
| Official Docker image | Yes | Yes |
| License | GPL-3.0 | MIT |
| Main language | Vue | Go |
Which one should you pick?
Semaphore UI scores 73/100 against 65/100 for Mainsail, so it is the safer default.
Semaphore UI ships more often: 20 stable releases in the past year, against 8 for Mainsail.
If you want the quickest setup, Semaphore UI is easier to run; Mainsail needs more configuration.
Semaphore UI is growing faster right now (+151 stars in 30 days).
Mainsail details →Semaphore UI details →