cobaltvsSemaphore UI
Two self-hosted projects, compared on the numbers selfhost.directory tracks live: score, popularity, release cadence and setup effort.
| cobalt | Semaphore UI | |
|---|---|---|
| Score | 83/100 | 73/100 |
| Rank in category | #1 of 45 in Download Management | #12 of 166 in Developer Tools |
| GitHub stars | 45 610 | 14 337 |
| Stars, last 30 days | +1 800 | +149 |
| Stable releases, 12 months | 0 | 20 |
| Latest release | — | v2.18.31 · 7 Oct 2026 |
| Setup | Easy | Easy |
| Official Docker image | Yes | Yes |
| License | AGPL-3.0 | MIT |
| Main language | Svelte | Go |
Which one should you pick?
cobalt scores 83/100 against 73/100 for Semaphore UI, so it is the safer default.
Semaphore UI ships more often: 20 stable releases in the past year, against 0 for cobalt.
cobalt is growing faster right now (+1 800 stars in 30 days).
cobalt details →Semaphore UI details →