Stalwart vs poste.io
Boring on purpose
Stalwart reimplements the mail stack. We package the one the internet has been running for twenty years - and have shipped it the same way since 2014.
- 10M+ Docker pulls
- 2014 shipping since
- 1 container to upgrade
Where they differ
| poste.io | Stalwart | |
|---|---|---|
| Implementation | Proven upstream projects | One new all-in-one server |
| In production since | 2014 | 2020s |
| Webmail | Roundcube included | Bring your own |
| Antivirus | ClamAV included | External integration |
The same on both: One deployable unit, Web administration, REST API, Log viewer, Unlimited domains and mailboxes.
Being fair about it
Stalwart is a great project and a genuinely interesting piece of engineering. Stalwart moves fast and implements things we do not, and if you want to follow a young project as it grows, that is a real advantage.
If you want a mail server that will still upgrade the same way in five years, poste.io may be a better fit.
What you get either way
- Tested as one unit SMTP, IMAP, spam filtering, antivirus, webmail and administration are exercised together against real servers before an image ships. A version bump in one part cannot quietly break another.
- Backward compatible Your data and your configuration survive upgrades. We have not asked anyone to reinstall since 2014.
- No babysitting Upgrading is always the same thing: replace the container. No procedure, no migration script, seconds of downtime. We can do it for you.
- Monitoring included The server watches itself. If you want somebody else to be the one who notices, we can watch it from the outside and step in.
- Custom work is possible The whole thing is ours, so we are not waiting for an upstream project to accept a feature. Tell us what you need.
- Not a weekend project Shipping since 2014, 10M+ Docker pulls, and paying customers who have been with us for years.