Fastmail for Business vs Kualo
In short: Kualo wins on privacy, they tie on price, and Fastmail for Business wins on features. The full comparison is below, last checked 25 October 2026.
Should you pick Fastmail for Business or Kualo?
- Fastmail for Business is the better pick if you want a cheaper plan, at $5 per user a month ($4.17 yearly); more room (50 GB, against 10 GB); and your diary and address book in one place with your email.
| Feature | Fastmail for Business | Kualo |
|---|---|---|
| Overall | 3.0 | 3.0 |
| Privacy | 2.0 | 2.5 |
| Price | 3.5 | 3.5 |
| Features | 5.0 | 3.5 |
| Cheapest plan | Standard $5 per user a month ($4.17 yearly) | Zimbra Professional Email From £3.99 per user a month (10 GB Zimbra mailbox, longer terms) |
| Free plan | No | No |
| Storage | 50 GB | 10 GB |
| 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 | United Kingdom |
| Founded | 1999 | 2000 |
| Free trial | 30 days free | 60-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 | No | No |
| 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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Where they differ
- On price: Fastmail for Business Standard at $5 per user a month ($4.17 yearly), against Kualo Zimbra Professional Email at From £3.99 per user a month (10 GB Zimbra mailbox, longer terms).
- Fastmail for Business comes with 50 GB of storage and Kualo with 10 GB of storage.
- Data location: EU (Amsterdam) for UK customers, with a US replica and US backups for Fastmail for Business, United Kingdom for Kualo.
- Fastmail for Business is based in Australia and Kualo in the United Kingdom, so different privacy laws apply.
Common questions
Which is more private, Fastmail for Business or Kualo?
Kualo scores 2.5 out of 5 for privacy and Fastmail for Business 2.
Which is cheaper, Fastmail for Business or Kualo?
Fastmail for Business is cheaper. Its Standard plan is $5 per user a month ($4.17 yearly), against From £3.99 per user a month (10 GB Zimbra mailbox, longer terms) for Kualo's Zimbra Professional Email. Check the renewal price before you pay, as some first-year prices go up.
Do Fastmail for Business and Kualo work with my own domain?
Yes, both do. Fastmail for Business: Up to 100. Kualo: Yes.
Where do Fastmail for Business and Kualo keep my email?
Fastmail for Business keeps it in the EU (Amsterdam) for UK customers, with a US replica and US backups. Kualo keeps it in the United Kingdom.
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 · Kualo news.
Not sold on either? Try these
Fastmail for Business vs mailbox.org · Kualo vs mailbox.org · Fastmail for Business vs Posteo · Kualo vs Posteo · Fastmail for Business vs Proton Mail · Kualo vs Proton Mail
How to switch
Whichever you choose, the move follows the same steps. Pick your two providers for the steps.