Fastmail for Business vs Stalwart
On privacy it's Fastmail for Business. On price it's Fastmail for Business. On features it's Fastmail for Business. Here's everything side by side, last checked 25 October 2026.
Which should you choose?
- Fastmail for Business suits you best if you want your email to stay in the EU (Amsterdam) for UK customers, with a US replica and US backups and a provider that's been going since 1999.
- Stalwart suits you best if you want a free plan to start on and open-source apps.
| Feature | Fastmail for Business | Stalwart |
|---|---|---|
| Overall | 3.0 | Not rated |
| Privacy | 2.0 | Not rated |
| Price | 3.5 | Not rated |
| Features | 5.0 | Not rated |
| Cheapest plan | Standard $5 per user a month ($4.17 yearly) | Community Free (Enterprise from €2 per mailbox a year) |
| Free plan | No | Yes, open source |
| Storage | 50 GB | Not confirmed |
| Your own domain | ✓ Up to 100 | ✓ Yes |
| End-to-end encryption | No | No |
| Company based in | Australia | United Kingdom |
| Your data is kept in | EU (Amsterdam) for UK customers, with a US replica and US backups | Your own server |
| Founded | 1999 | 2019 |
| Free trial | 30 days free | 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 | No | Unknown |
| Reader offer | Offer 10% off your first year, plus a free trial of up to 30 days | None |
| Last checked | 22 October 2026 | 25 October 2026 |
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How Fastmail for Business and Stalwart differ
- On price: Fastmail for Business Standard at $5 per user a month ($4.17 yearly), against Stalwart Community at Free (Enterprise from €2 per mailbox a year).
- For free, Fastmail for Business gives you no free plan, and Stalwart a free plan (open source).
- Fastmail for Business comes with 50 GB of storage and Stalwart with storage not confirmed.
- Data location: EU (Amsterdam) for UK customers, with a US replica and US backups for Fastmail for Business, Your own server for Stalwart.
- Fastmail for Business is based in Australia and Stalwart in the United Kingdom, so different privacy laws apply.
Questions people ask
Do Fastmail for Business and Stalwart work with my own domain?
Yes, both do. Fastmail for Business: Up to 100. Stalwart: Yes.
Where do Fastmail for Business and Stalwart keep my email?
Fastmail for Business keeps it in the EU (Amsterdam) for UK customers, with a US replica and US backups. Stalwart keeps it in Your own server.
Recent price changes
I haven't seen either change its price since I started checking on 22 October 2026.
The latest headlines: Fastmail for Business news · Stalwart news.
Not sold on either? Try these
Fastmail for Business vs mailbox.org · Stalwart vs mailbox.org · Fastmail for Business vs Posteo · Stalwart vs Posteo · Fastmail for Business vs Proton Mail · Stalwart vs Proton Mail
How to switch
Whichever you choose, the move follows the same steps. Pick your two providers for the steps.