Microsoft 365 Business vs one.com
On privacy it's one.com. On price it's Microsoft 365 Business. On features it's Microsoft 365 Business. Here's everything side by side, last checked 25 October 2026.
Microsoft 365 Business or one.com: which should you choose?
- Choose Microsoft 365 Business if you want more space for your mail: 50 GB and calendar and contacts in the same account.
- one.com suits you best if you want a company that isn't funded by advertising.
| Feature | Microsoft 365 Business | one.com |
|---|---|---|
| Overall | 2.5 | Not rated |
| Privacy | 1.0 | 2.5 |
| Price | 2.5 | Not rated |
| Features | 5.0 | 3.0 |
| Cheapest plan | Business Basic £5.40 per user a month, yearly, ex VAT | Email Not confirmed |
| Free plan | No | No |
| Storage | 50 GB | 3 GB |
| Your own domain | ✓ Yes | ✓ Yes |
| End-to-end encryption | No | No |
| Company based in | United States | Denmark |
| Your data is kept in | UK data centres for UK tenants (London, Cardiff, Durham) | Denmark |
| Founded | 2011 | Unknown |
| Free trial | One month free on some plans | 15-day money-back guarantee |
| Funded by advertising | Yes, or its parent company is | 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 | None | None |
| Last checked | 22 October 2026 | 25 October 2026 |
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How Microsoft 365 Business and one.com differ
- On price: Microsoft 365 Business Business Basic at £5.40 per user a month, yearly, ex VAT, against one.com Email at Not confirmed.
- Space: Microsoft 365 Business gives 50 GB of storage, one.com 3 GB of storage.
- Data location: UK data centres for UK tenants (London, Cardiff, Durham) for Microsoft 365 Business, Denmark for one.com.
- The companies sit under different laws: Microsoft 365 Business in United States, one.com in Denmark.
- Microsoft 365 Business (or its parent company) makes money from advertising; one.com doesn't.
Questions people ask
Is Microsoft 365 Business more private than one.com?
one.com scores 2.5 out of 5 for privacy and Microsoft 365 Business 1. one.com gives you a company that isn't funded by advertising.
Can I use my own domain with Microsoft 365 Business or one.com?
Yes, both do. Microsoft 365 Business: Yes. one.com: Yes.
Where is my email stored with Microsoft 365 Business and one.com?
Microsoft 365 Business keeps it in the UK data centres for UK tenants (London, Cardiff, Durham). one.com keeps it in Denmark.
Prices and the latest news
- 27 July 2026 Microsoft 365 Business: £5.40 (UK price change from 1 July 2026)
- 1 June 2026 Microsoft 365 Business: £4.90
The latest headlines: Microsoft 365 Business news · one.com news.
Not sold on either? Try these
- mailbox.org4.5 out of 5 overall
- Proton Mail for Business4.0 out of 5 overall
- Tuta Business4.0 out of 5 overall
Microsoft 365 Business vs mailbox.org · one.com vs mailbox.org · Microsoft 365 Business vs Proton Mail for Business · one.com vs Proton Mail for Business · Microsoft 365 Business vs Tuta Business · one.com vs Tuta Business
Switching between them
Moving to Microsoft 365 Business · Moving from Microsoft 365 Business. Or see all my switching guides.