mailcow vs one.com
One.com wins on privacy, they tie on price and one.com wins on features. Every fact below was checked on or before 25 October 2026.
mailcow or one.com: which should you choose?
- Choose mailcow if you want a free plan to start on; a calendar and contacts alongside your mail; and open-source apps anyone can check.
- one.com is the better pick if you want your email to stay in Denmark.
| Feature | mailcow | one.com |
|---|---|---|
| Overall | Not rated | Not rated |
| Privacy | Not rated | 2.5 |
| Price | Not rated | Not rated |
| Features | Not rated | 3.0 |
| Cheapest plan | Open source Free | Email Not confirmed |
| Free plan | Yes, open source | No |
| Storage | Not confirmed | 3 GB |
| Your own domain | ✓ Yes | ✓ Yes |
| End-to-end encryption | No | No |
| Company based in | Germany | Denmark |
| Your data is kept in | Your own server | Denmark |
| Founded | Unknown | Unknown |
| Free trial | Free to download | 15-day money-back guarantee |
| Funded by advertising | No | No |
| Works in any mail app | ✓ IMAP and SMTP | ✓ IMAP and SMTP |
| Calendar and contacts | ✓ Yes | No |
| Aliases | Yes | Yes |
| Open-source apps | ✓ Yes | No |
| Sign up without ID | No | No |
| White label | Unknown | Unknown |
| Reader offer | None | None |
| Last checked | 25 October 2026 | 25 October 2026 |
Want to add another? Open this in the compare tool.
The key differences
- Cheapest plans: mailcow Open source, Free. one.com Email, Not confirmed.
- mailcow has a free plan (open source); one.com has no free plan.
- Space: mailcow gives storage not confirmed, one.com 3 GB of storage.
- Data location: Your own server for mailcow, Denmark for one.com.
- The companies sit under different laws: mailcow in Germany, one.com in Denmark.
Questions people ask
Can I use my own domain with mailcow or one.com?
Yes, both do. mailcow: Yes. one.com: Yes.
Where is my email stored with mailcow and one.com?
mailcow keeps it in Your own server. one.com keeps it in Denmark.
Prices and the latest news
Neither price has changed since my first check on 25 October 2026.
The latest headlines: mailcow news · one.com news.
Also worth a look
- mailbox.org4.5 out of 5 overall
- Proton Mail for Business4.0 out of 5 overall
- Tuta Business4.0 out of 5 overall
mailcow vs mailbox.org · one.com vs mailbox.org · mailcow vs Proton Mail for Business · one.com vs Proton Mail for Business · mailcow vs Tuta Business · one.com vs Tuta Business
How to switch
Moving between any two providers works the same way. Pick your two providers for the steps.