Mail-in-a-Boxvsunleash
Two self-hosted projects, compared on the numbers selfhost.directory tracks live: score, popularity, release cadence and setup effort.
| Mail-in-a-Box | unleash | |
|---|---|---|
| Score | 72/100 | 75/100 |
| Rank in category | #3 of 16 in Mail Server | #1 of 8 in Feature Flags |
| GitHub stars | 15 446 | 13 912 |
| Stars, last 30 days | +27 | +86 |
| Stable releases, 12 months | 4 | 15 |
| Latest release | v77 · 26 Sept 2026 | v8.3.0 · 27 Oct 2026 |
| Setup | Moderate | Easy |
| Official Docker image | No | Yes |
| License | CC0-1.0 | AGPL-3.0 |
| Main language | Python | Typescript |
Which one should you pick?
unleash scores 75/100 against 72/100 for Mail-in-a-Box, so it is the safer default.
unleash ships more often: 15 stable releases in the past year, against 4 for Mail-in-a-Box.
If you want the quickest setup, unleash is easier to run; Mail-in-a-Box needs more configuration.
unleash is growing faster right now (+86 stars in 30 days).
Mail-in-a-Box details →unleash details →
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