Mail-in-a-BoxvsZero-K
Two self-hosted projects, compared on the numbers selfhost.directory tracks live: score, popularity, release cadence and setup effort.
| Mail-in-a-Box | Zero-K | |
|---|---|---|
| Score | 72/100 | 62/100 |
| Rank in category | #3 of 16 in Mail Server | #2 of 23 in Gaming |
| GitHub stars | 15 446 | 877 |
| Stars, last 30 days | +27 | +26 |
| Stable releases, 12 months | 4 | 0 |
| Latest release | v77 · 26 Sept 2026 | — |
| Setup | Moderate | Easy |
| Official Docker image | No | No |
| License | CC0-1.0 | GPL-2.0 |
| Main language | Python | Lua |
Which one should you pick?
Mail-in-a-Box scores 72/100 against 62/100 for Zero-K, so it is the safer default.
Mail-in-a-Box ships more often: 4 stable releases in the past year, against 0 for Zero-K.
If you want the quickest setup, Zero-K is easier to run; Mail-in-a-Box needs more configuration.
Mail-in-a-Box details →Zero-K details →
Swap a project
Keep Mail-in-a-Box, compare it with
Keep Zero-K, compare it with