Posteo vs IONOS Mail
On privacy it's Posteo. On price it's Posteo. On features it's a tie. Here's everything side by side, last checked 22 October 2026.
Should you pick Posteo or IONOS Mail?
- Posteo suits you best if you want to pay less: €1 a month; more room (4 GB, against 2 GB); and calendar and contacts in the same account.
- IONOS Mail suits you best if you want an address on your own domain and a provider that's been going since 1988.
| Feature | Posteo | IONOS Mail |
|---|---|---|
| Overall | 4.5 | 3.0 |
| Privacy | 4.5 | 2.5 |
| Price | 5.0 | 4.5 |
| Features | 3.0 | 3.0 |
| Cheapest plan | Posteo €1 a month | Mail Basic About £1–£2 a month (not confirmed) |
| Free plan | No | No |
| Storage | 4 GB | 2 GB |
| Your own domain | No | ✓ Yes |
| End-to-end encryption | Optional (PGP or encrypted storage) | No |
| Company based in | Germany | Germany |
| Your data is kept in | Germany | UK data centre in Worcester; where email sits not confirmed |
| Founded | 2009 | 1988 |
| Free trial | No, €1 a month from the start | Unknown |
| Funded by advertising | No | No |
| Works in any mail app | ✓ IMAP and SMTP | ✓ IMAP and SMTP |
| Calendar and contacts | ✓ Yes | No |
| Aliases | Yes (posteo.de only) | Yes |
| Open-source apps | ✓ Yes | No |
| Sign up without ID | ✓ Yes | No |
| White label | No | Unknown |
| Reader offer | None | None |
| Last checked | 22 October 2026 | 22 October 2026 |
Want to add another? Open this in the compare tool.
The key differences
- Posteo's cheapest plan is Posteo (€1 a month); IONOS Mail's is Mail Basic (About £1–£2 a month (not confirmed)).
- Posteo comes with 4 GB of storage and IONOS Mail with 2 GB of storage.
- Data location: Germany for Posteo, UK data centre in Worcester; where email sits not confirmed for IONOS Mail.
- Posteo offers optional encryption (PGP or encrypted storage); IONOS Mail doesn't encrypt mail end to end.
- IONOS Mail lets you bring your own domain name; Posteo doesn't.
- For extra addresses, Posteo has yes (posteo.de only) and IONOS Mail has yes.
Common questions
Which is more private, Posteo or IONOS Mail?
Posteo scores 4.5 out of 5 for privacy and IONOS Mail 2.5. Posteo gives you apps whose code is public and sign-up without ID.
Which is cheaper, Posteo or IONOS Mail?
Posteo is cheaper. Its Posteo plan is €1 a month, against About £1–£2 a month (not confirmed) for IONOS Mail's Mail Basic. Check the renewal price before you pay, as some first-year prices go up.
Do Posteo and IONOS Mail work with my own domain?
Only IONOS Mail does (Yes). With Posteo your address stays on its own domain.
Where do Posteo and IONOS Mail keep my email?
Posteo keeps it in Germany. IONOS Mail keeps it in the UK data centre in Worcester; where email sits not confirmed.
Prices and the latest news
Neither price has changed since my first check on 22 October 2026.
The latest headlines: Posteo news · IONOS Mail news.
Alternatives to Posteo and IONOS Mail
Posteo vs mailbox.org · IONOS Mail vs mailbox.org · Posteo vs Proton Mail · IONOS Mail vs Proton Mail · Posteo vs Tuta · IONOS Mail vs Tuta
Moving your email
Moving to Posteo · Moving from Posteo. Or see all my switching guides.