Posteo vs Fastmail for Business
Posteo wins on privacy, Posteo wins on price and Fastmail for Business wins on features. Every fact below was checked on or before 22 October 2026.
Posteo or Fastmail for Business: which should you choose?
- Posteo is the better pick if you want the lower price (€1 a month); features the other lacks, like PGP encryption as well as pay with cash or crypto; and open-source apps.
- Fastmail for Business suits you best if you want email at your own domain name; 50 GB of storage; and features the other lacks, like catch-all address as well as mobile apps.
| Feature | Posteo | Fastmail for Business |
|---|---|---|
| Overall | 4.5 | 3.0 |
| Privacy | 4.5 | 2.0 |
| Price | 5.0 | 3.5 |
| Features | 3.0 | 5.0 |
| Cheapest plan | Posteo €1 a month | Standard $5 per user a month ($4.17 yearly) |
| Free plan | No | No |
| Storage | 4 GB | 50 GB |
| Your own domain | No | ✓ Up to 100 |
| End-to-end encryption | Optional (PGP or encrypted storage) | No |
| Company based in | Germany | Australia |
| Your data is kept in | Germany | EU (Amsterdam) for UK customers, with a US replica and US backups |
| Founded | 2009 | 1999 |
| Free trial | No, €1 a month from the start | 30 days free |
| Funded by advertising | No | No |
| Works in any mail app | ✓ IMAP and SMTP | ✓ IMAP and SMTP |
| Calendar and contacts | ✓ Yes | ✓ Yes |
| Aliases | Yes (posteo.de only) | Yes |
| Open-source apps | ✓ Yes | No |
| Sign up without ID | ✓ Yes | No |
| White label | No | No |
| Reader offer | None | Offer 10% off your first year, plus a free trial of up to 30 days |
| Last checked | 22 October 2026 | 22 October 2026 |
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The key differences
- Cheapest plans: Posteo Posteo, €1 a month. Fastmail for Business Standard, $5 per user a month ($4.17 yearly).
- Posteo comes with 4 GB of storage and Fastmail for Business with 50 GB of storage.
- Data location: Germany for Posteo, EU (Amsterdam) for UK customers, with a US replica and US backups for Fastmail for Business.
- Posteo is based in Germany and Fastmail for Business in Australia, so different privacy laws apply.
- Posteo offers optional encryption (PGP or encrypted storage); Fastmail for Business doesn't encrypt mail end to end.
- Fastmail for Business lets you bring your own domain name; Posteo doesn't.
- For extra addresses, Posteo has yes (posteo.de only) and Fastmail for Business has yes.
Posteo and Fastmail for Business: your questions
Which is more private, Posteo or Fastmail for Business?
Posteo scores 4.5 out of 5 for privacy and Fastmail for Business 2. Posteo gives you open-source apps and to sign up without proving who you are.
Which is cheaper, Posteo or Fastmail for Business?
Posteo is cheaper. Its Posteo plan is €1 a month, against $5 per user a month ($4.17 yearly) for Fastmail for Business's Standard. Check the renewal price before you pay, as some first-year prices go up.
Do Posteo and Fastmail for Business work with my own domain?
Only Fastmail for Business does (Up to 100). With Posteo your address stays on its own domain.
Where do Posteo and Fastmail for Business keep my email?
Posteo keeps it in Germany. Fastmail for Business keeps it in the EU (Amsterdam) for UK customers, with a US replica and US backups.
Prices and the latest news
Neither price has changed since my first check on 22 October 2026.
The latest headlines: Posteo news · Fastmail for Business news.
Alternatives to Posteo and Fastmail for Business
Posteo vs mailbox.org · Fastmail for Business vs mailbox.org · Posteo vs Proton Mail · Fastmail for Business vs Proton Mail · Posteo vs Tuta · Fastmail for Business vs Tuta
How to switch
Moving to Posteo · Moving from Posteo. Or see all my switching guides.