Stalwart vs UK2
UK2 wins on privacy, UK2 wins on price and UK2 wins on features. Every fact below was checked on or before 25 October 2026.
Which should you choose?
- Stalwart is the better pick if you want a free plan before you pay anything; your diary and address book in one place with your email; and apps whose code is public.
- UK2 is the better pick if you want your mail kept in the United Kingdom and a provider that's been going since 1998.
| Feature | Stalwart | UK2 |
|---|---|---|
| Overall | Not rated | 3.0 |
| Privacy | Not rated | 2.5 |
| Price | Not rated | 3.5 |
| Features | Not rated | 3.5 |
| Cheapest plan | Community Free (Enterprise from €2 per mailbox a year) | Web hosting From £3.99 a month (£1 for the first month), web hosting with a 10 GB mailbox |
| Free plan | Yes, open source | No |
| Storage | Not confirmed | 10 GB |
| Your own domain | ✓ Yes | ✓ Yes |
| End-to-end encryption | No | No |
| Company based in | United Kingdom | United Kingdom |
| Your data is kept in | Your own server | United Kingdom |
| Founded | 2019 | 1998 |
| Free trial | Free to download | 30-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.
Where they differ
- Stalwart's cheapest plan is Community (Free (Enterprise from €2 per mailbox a year)); UK2's is Web hosting (From £3.99 a month (£1 for the first month), web hosting with a 10 GB mailbox).
- For free, Stalwart gives you a free plan (open source), and UK2 no free plan.
- Stalwart comes with storage not confirmed and UK2 with 10 GB of storage.
- Your mail is stored in Your own server with Stalwart, and in the United Kingdom with UK2.
Common questions
Do Stalwart and UK2 work with my own domain?
Yes, both do. Stalwart: Yes. UK2: Yes.
Where do Stalwart and UK2 keep my email?
Stalwart keeps it in Your own server. UK2 keeps it in the United Kingdom.
Prices and the latest news
I haven't seen either change its price since I started checking on 25 October 2026.
The latest headlines: Stalwart news · UK2 news.
Alternatives to Stalwart and UK2
- mailbox.org4.5 out of 5 overall
- Tuta Business4.0 out of 5 overall
- Proton Mail for Business4.0 out of 5 overall
Stalwart vs mailbox.org · UK2 vs mailbox.org · Stalwart vs Tuta Business · UK2 vs Tuta Business · Stalwart vs Proton Mail for Business · UK2 vs Proton Mail for Business
Moving your email
Whichever you choose, the move follows the same steps. Pick your two providers for the steps.