IONOS Mail vs Stalwart
On privacy it's IONOS Mail. On price it's IONOS Mail. On features it's IONOS Mail. Here's everything side by side, last checked 25 October 2026.
Which should you choose?
- IONOS Mail suits you best if you want your mailbox stored in the UK data centre in Worcester; and where email sits not confirmed and a provider that's been going since 1988.
- Stalwart is the better pick if you want a free plan to start on; your diary and address book in one place with your email; and open-source apps.
| Feature | IONOS Mail | Stalwart |
|---|---|---|
| Overall | 3.0 | Not rated |
| Privacy | 2.5 | Not rated |
| Price | 4.5 | Not rated |
| Features | 3.0 | Not rated |
| Cheapest plan | Mail Basic About £1–£2 a month (not confirmed) | Community Free (Enterprise from €2 per mailbox a year) |
| Free plan | No | Yes, open source |
| Storage | 2 GB | Not confirmed |
| Your own domain | ✓ Yes | ✓ Yes |
| End-to-end encryption | No | No |
| Company based in | Germany | United Kingdom |
| Your data is kept in | UK data centre in Worcester; where email sits not confirmed | Your own server |
| Founded | 1988 | 2019 |
| Free trial | Unknown | Free to download |
| Funded by advertising | No | No |
| Works in any mail app | ✓ IMAP and SMTP | ✓ IMAP and SMTP |
| Calendar and contacts | No | ✓ Yes |
| Aliases | Yes | Yes |
| Open-source apps | No | ✓ Yes |
| Sign up without ID | No | No |
| White label | Unknown | Unknown |
| Reader offer | None | None |
| Last checked | 22 October 2026 | 25 October 2026 |
Want to add another? Open this in the compare tool.
The key differences
- Cheapest plans: IONOS Mail Mail Basic, About £1–£2 a month (not confirmed). Stalwart Community, Free (Enterprise from €2 per mailbox a year).
- For free, IONOS Mail gives you no free plan, and Stalwart a free plan (open source).
- IONOS Mail comes with 2 GB of storage and Stalwart with storage not confirmed.
- Your mail is stored in the UK data centre in Worcester; where email sits not confirmed with IONOS Mail, and in Your own server with Stalwart.
- IONOS Mail is based in Germany and Stalwart in the United Kingdom, so different privacy laws apply.
IONOS Mail and Stalwart: your questions
Do IONOS Mail and Stalwart work with my own domain?
Yes, both do. IONOS Mail: Yes. Stalwart: Yes.
Where do IONOS Mail and Stalwart keep my email?
IONOS Mail keeps it in the UK data centre in Worcester; where email sits not confirmed. Stalwart keeps it in Your own server.
Prices and the latest news
Neither price has changed since my first check on 22 October 2026.
The latest headlines: IONOS Mail news · Stalwart news.
Alternatives to IONOS Mail and Stalwart
- mailbox.org4.5 out of 5 overall
- Proton Mail for Business4.0 out of 5 overall
- Tuta Business4.0 out of 5 overall
IONOS Mail vs mailbox.org · Stalwart vs mailbox.org · IONOS Mail vs Proton Mail for Business · Stalwart vs Proton Mail for Business · IONOS Mail vs Tuta Business · Stalwart vs Tuta Business
Switching between them
Whichever you choose, the move follows the same steps. Pick your two providers for the steps.