20i vs Stalwart
In short: 20i wins on privacy, they tie on price, and 20i wins on features. The full comparison is below, last checked 25 October 2026.
20i or Stalwart: which should you choose?
- 20i is the better pick if you want your mail kept in the United Kingdom.
- Go for Stalwart if you'd like a free plan before you pay anything and open-source apps anyone can check.
| Feature | 20i | Stalwart |
|---|---|---|
| Overall | Not rated | Not rated |
| Privacy | 2.5 | Not rated |
| Price | Not rated | Not rated |
| Features | 4.5 | Not rated |
| Cheapest plan | Email hosting Not confirmed | Community Free (Enterprise from €2 per mailbox a year) |
| Free plan | No | Yes, open source |
| Storage | 10 GB | Not confirmed |
| Your own domain | ✓ Yes | ✓ Yes |
| End-to-end encryption | No | No |
| Company based in | United Kingdom | United Kingdom |
| Your data is kept in | United Kingdom | Your own server |
| Founded | Unknown | 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 | ✓ Yes | ✓ Yes |
| Aliases | Yes | Yes |
| Open-source apps | No | ✓ Yes |
| Sign up without ID | No | No |
| White label | ✓ Yes | 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
- On price: 20i Email hosting at Not confirmed, against Stalwart Community at Free (Enterprise from €2 per mailbox a year).
- 20i has no free plan; Stalwart has a free plan (open source).
- Space: 20i gives 10 GB of storage, Stalwart storage not confirmed.
- 20i keeps your mail in the United Kingdom, while Stalwart keeps it in Your own server.
Questions people ask
Can I use my own domain with 20i or Stalwart?
Yes, both do. 20i: Yes. Stalwart: Yes.
Where is my email stored with 20i and Stalwart?
20i keeps it in the United Kingdom. Stalwart keeps it in Your own server.
Recent price changes
I haven't seen either change its price since I started checking on 25 October 2026.
The latest headlines: 20i news · Stalwart news.
Not sold on either? Try these
- mailbox.org4.5 out of 5 overall
- Proton Mail for Business4.0 out of 5 overall
- Tuta Business4.0 out of 5 overall
20i vs mailbox.org · Stalwart vs mailbox.org · 20i vs Proton Mail for Business · Stalwart vs Proton Mail for Business · 20i vs Tuta Business · Stalwart vs Tuta Business
How to switch
Moving between any two providers works the same way. Pick your two providers for the steps.