Fastmail vs Posteo
Posteo wins on privacy, Posteo wins on price and Fastmail wins on features. Every fact below was checked on or before 22 October 2026.
Should you pick Fastmail or Posteo?
- Fastmail is the better pick if you want to use your own domain, like you@yourname.co.uk; 50 GB of storage; and extras such as catch-all address as well as mobile apps.
- Choose Posteo if you want a cheaper plan, at €1 a month; extras such as PGP encryption as well as pay with cash or crypto; and open-source apps anyone can check.
| Feature | Fastmail | Posteo |
|---|---|---|
| Overall | 3.0 | 4.5 |
| Privacy | 2.0 | 4.5 |
| Price | 3.5 | 5.0 |
| Features | 5.0 | 3.0 |
| Cheapest plan | Individual $5 a month, yearly | Posteo €1 a month |
| Free plan | No | No |
| Storage | 50 GB | 4 GB |
| Your own domain | ✓ Yes | No |
| End-to-end encryption | No | Optional (PGP or encrypted storage) |
| Company based in | Australia | Germany |
| Your data is kept in | EU (Amsterdam) for UK customers, with a US replica and US backups | Germany |
| Founded | 1999 | 2009 |
| Free trial | 30 days free | No, €1 a month from the start |
| Funded by advertising | No | No |
| Works in any mail app | ✓ IMAP and SMTP | ✓ IMAP and SMTP |
| Calendar and contacts | ✓ Yes | ✓ Yes |
| Aliases | Masked email and aliases | Yes (posteo.de only) |
| Open-source apps | No | ✓ Yes |
| Sign up without ID | No | ✓ Yes |
| White label | No | No |
| Reader offer | Offer 10% off your first year, plus a free trial of up to 30 days | None |
| Last checked | 22 October 2026 | 22 October 2026 |
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How Fastmail and Posteo differ
- Cheapest plans: Fastmail Individual, $5 a month, yearly. Posteo Posteo, €1 a month.
- Space: Fastmail gives 50 GB of storage, Posteo 4 GB of storage.
- Your mail is stored in the EU (Amsterdam) for UK customers, with a US replica and US backups with Fastmail, and in Germany with Posteo.
- The companies sit under different laws: Fastmail in Australia, Posteo in Germany.
- On encryption, Fastmail doesn't encrypt mail end to end, whereas Posteo offers optional encryption (PGP or encrypted storage).
- You can use your own domain with Fastmail, but not with Posteo.
- Aliases: Fastmail offers masked email and aliases, Posteo yes (posteo.de only).
Common questions
Is Fastmail more private than Posteo?
Posteo scores 4.5 out of 5 for privacy and Fastmail 2. Posteo gives you open-source apps anyone can check and sign-up without ID.
Is Fastmail cheaper than Posteo?
Posteo is cheaper. Its Posteo plan is €1 a month, against $5 a month, yearly for Fastmail's Individual. Check the renewal price before you pay, as some first-year prices go up.
Can I use my own domain with Fastmail or Posteo?
Only Fastmail does (Yes). With Posteo your address stays on its own domain.
Where is my email stored with Fastmail and Posteo?
Fastmail keeps it in the EU (Amsterdam) for UK customers, with a US replica and US backups. Posteo keeps it in Germany.
Prices and the latest news
No price changes for either since 22 October 2026. I check regularly and add any change here with its date.
The latest headlines: Fastmail news · Posteo news.
Alternatives to Fastmail and Posteo
Fastmail vs mailbox.org · Posteo vs mailbox.org · Fastmail vs Proton Mail · Posteo vs Proton Mail · Fastmail vs Tuta · Posteo vs Tuta
How to switch
Ready to move? My step-by-step guides cover your mail, contacts, forwarding and your own domain: Fastmail to Posteo · Posteo to Fastmail.