Mailu vs Stalwart Mail Server
A side-by-side comparison of Mailu and Stalwart Mail Server — pricing, license, deployment, and where each tool wins.
Mailu
mailu.io
Simple yet full-featured mail server as a set of Docker images.
Stalwart Mail Server
stalw.art
All-in-one mail server with JMAP, IMAP4, and SMTP support and a wide range of modern features.
| Feature | Mailu | Stalwart Mail Server |
|---|---|---|
| Pricing | Free | Free |
| Model | Open-source | Open-source |
| License | CC-BY-SA-3.0 | CC-BY-SA-3.0 |
| Deployment | Self-hosted | Self-hosted |
| Category | Communication - Email - Complete Solutions | Communication - Email - Complete Solutions |
| Self-hosted | ✓Yes | ✓Yes |
| Free tier | ✓Yes | ✓Yes |
Pick Mailu if…
- ✓You prefer Mailu's feature set or ecosystem fit.
Pick Stalwart Mail Server if…
- ✓You prefer Stalwart Mail Server's feature set or ecosystem fit.