# Mail-in-a-Box vs Ultimate Certificate Manager

> Two self-hosted projects, compared on the numbers selfhost.directory tracks live: score, popularity, release cadence and setup effort.

| | Mail-in-a-Box | Ultimate Certificate Manager |
|---|---|---|
| Score | 72/100 ✓ | 50/100 |
| Rank in category | #3 of 16 in Mail Server | #4 of 8 in Certificate Management |
| GitHub stars | 15 445 ✓ | 170 |
| Stars, last 30 days | +27 | — |
| Stable releases, 12 months | 4 | 4 |
| Latest release | v77 · 26 Sept 2026 | v2.246 · 27 Oct 2026 ✓ |
| Setup | Moderate | Moderate ✓ |
| Official Docker image | No | Yes ✓ |
| License | CC0-1.0 | AGPL-3.0 |
| Main language | Python | Python |

## Which one should you pick?

Mail-in-a-Box scores 72/100 against 50/100 for Ultimate Certificate Manager, so it is the safer default.

Mail-in-a-Box is growing faster right now (+27 stars in 30 days).

## Details

- [Mail-in-a-Box](https://selfhost.directory/project/mail-in-a-box) (markdown: https://selfhost.directory/project/mail-in-a-box.md)
- [Ultimate Certificate Manager](https://selfhost.directory/project/ultimate-ca-manager) (markdown: https://selfhost.directory/project/ultimate-ca-manager.md)

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Source: https://selfhost.directory/compare/mail-in-a-box-vs-ultimate-ca-manager