Mail-in-a-Boxvsprefect
Two self-hosted projects, compared on the numbers selfhost.directory tracks live: score, popularity, release cadence and setup effort.
| Mail-in-a-Box | prefect | |
|---|---|---|
| Score | 72/100 | 80/100 |
| Rank in category | #3 of 16 in Mail Server | #5 of 32 in Workflow Automation |
| GitHub stars | 15 450 | 24 093 |
| Stars, last 30 days | +32 | +181 |
| Stable releases, 12 months | 4 | 17 |
| Latest release | v77 · 26 Sept 2026 | 2.20.27 · 23 Oct 2026 |
| Setup | Moderate | Moderate |
| Official Docker image | No | Yes |
| License | CC0-1.0 | Apache-2.0 |
| Main language | Python | Python |
Which one should you pick?
prefect scores 80/100 against 72/100 for Mail-in-a-Box, so it is the safer default.
prefect ships more often: 17 stable releases in the past year, against 4 for Mail-in-a-Box.
prefect is growing faster right now (+181 stars in 30 days).
Mail-in-a-Box details →prefect details →
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