Microsoft 365 Business vs Heart Internet
In short: Heart Internet wins on privacy, Heart Internet wins on price, and Microsoft 365 Business wins on features. The full comparison is below, last checked 25 October 2026.
Which should you choose?
- Microsoft 365 Business suits you best if you want 50 GB of storage and a calendar and contacts alongside your mail.
- Heart Internet suits you best if you want a provider with no advertising business behind it and to pay less: £12.37 a month for 10 mailboxes.
| Feature | Microsoft 365 Business | Heart Internet |
|---|---|---|
| Overall | 2.5 | 3.5 |
| Privacy | 1.0 | 2.5 |
| Price | 2.5 | 4.5 |
| Features | 5.0 | 3.5 |
| Cheapest plan | Business Basic £5.40 per user a month, yearly, ex VAT | 10 Essential mailboxes £12.37 a month for 10 mailboxes |
| Free plan | No | No |
| Storage | 50 GB | 5 GB |
| Your own domain | ✓ Yes | ✓ Yes |
| End-to-end encryption | No | No |
| Company based in | United States | United Kingdom |
| Your data is kept in | UK data centres for UK tenants (London, Cardiff, Durham) | United Kingdom |
| Founded | 2011 | Unknown |
| Free trial | One month free on some plans | Unknown |
| 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 |
Want to add another? Open this in the compare tool.
Where they differ
- Cheapest plans: Microsoft 365 Business Business Basic, £5.40 per user a month, yearly, ex VAT. Heart Internet 10 Essential mailboxes, £12.37 a month for 10 mailboxes.
- Microsoft 365 Business comes with 50 GB of storage and Heart Internet with 5 GB of storage.
- Your mail is stored in the UK data centres for UK tenants (London, Cardiff, Durham) with Microsoft 365 Business, and in the United Kingdom with Heart Internet.
- Microsoft 365 Business is based in the United States and Heart Internet in the United Kingdom, so different privacy laws apply.
- Only Microsoft 365 Business is part of an advertising business.
Microsoft 365 Business and Heart Internet: your questions
Which is more private, Microsoft 365 Business or Heart Internet?
Heart Internet scores 2.5 out of 5 for privacy and Microsoft 365 Business 1. Heart Internet gives you a provider with no advertising business behind it.
Which is cheaper, Microsoft 365 Business or Heart Internet?
Heart Internet is cheaper. Its 10 Essential mailboxes plan is £12.37 a month for 10 mailboxes, against £5.40 per user a month, yearly, ex VAT for Microsoft 365 Business's Business Basic. Check the renewal price before you pay, as some first-year prices go up.
Do Microsoft 365 Business and Heart Internet work with my own domain?
Yes, both do. Microsoft 365 Business: Yes. Heart Internet: Yes.
Where do Microsoft 365 Business and Heart Internet keep my email?
Microsoft 365 Business keeps it in the UK data centres for UK tenants (London, Cardiff, Durham). Heart Internet keeps it in the United Kingdom.
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 · Heart Internet news.
Also worth a look
- 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 · Heart Internet vs mailbox.org · Microsoft 365 Business vs Proton Mail for Business · Heart Internet vs Proton Mail for Business · Microsoft 365 Business vs Tuta Business · Heart Internet vs Tuta Business
Switching between them
Moving to Microsoft 365 Business · Moving from Microsoft 365 Business. Or see all my switching guides.