Microsoft 365 Business vs 123 Reg

Microsoft 365 Business wins on privacy, 123 Reg wins on price and Microsoft 365 Business wins on features. Every fact below was checked on or before 25 October 2026.

Which should you choose?

Microsoft 365 Business is the better pick if you want your mail kept in the UK data centres for UK tenants (London, Cardiff, Durham); 50 GB of storage; and a calendar and contacts alongside your mail.
123 Reg is the better pick if you want email from a company that doesn't make money from adverts; to pay less: £1.99 a mailbox a month for the first year, then £47.88 a year; and a company with a longer track record (since 2000).

Feature	Microsoft 365 Business	123 Reg
Overall	2.5	2.0
Privacy	1.0	0.5
Price	2.5	3.5
Features	5.0	3.5
Cheapest plan	Business Basic £5.40 per user a month, yearly, ex VAT	10 GB mailbox £1.99 a mailbox a month for the first year, then £47.88 a year
Free plan	No	No
Storage	50 GB	10 GB
Your own domain	✓ Yes	✓ Yes
End-to-end encryption	No	No
Company based in	United States	United Kingdom (GoDaddy)
Your data is kept in	UK data centres for UK tenants (London, Cardiff, Durham)	Not confirmed
Founded	2011	2000
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

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Where they differ

On price: Microsoft 365 Business Business Basic at £5.40 per user a month, yearly, ex VAT, against 123 Reg 10 GB mailbox at £1.99 a mailbox a month for the first year, then £47.88 a year.
Microsoft 365 Business comes with 50 GB of storage and 123 Reg with 10 GB of storage.
Microsoft 365 Business keeps your mail in the UK data centres for UK tenants (London, Cardiff, Durham), while 123 Reg keeps it in Not confirmed.
Microsoft 365 Business is based in the United States and 123 Reg in the United Kingdom (GoDaddy), so different privacy laws apply.
Only Microsoft 365 Business is part of an advertising business.

Questions people ask

Which is more private, Microsoft 365 Business or 123 Reg?

Microsoft 365 Business scores 1 out of 5 for privacy and 123 Reg 0.5. Microsoft 365 Business gives you your mail kept in the UK data centres for UK tenants (London, Cardiff, Durham).

Which is cheaper, Microsoft 365 Business or 123 Reg?

123 Reg is cheaper. Its 10 GB mailbox plan is £1.99 a mailbox a month for the first year, then £47.88 a year, 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 123 Reg work with my own domain?

Yes, both do. Microsoft 365 Business: Yes. 123 Reg: Yes.

Where do Microsoft 365 Business and 123 Reg keep my email?

Microsoft 365 Business keeps it in the UK data centres for UK tenants (London, Cardiff, Durham). 123 Reg keeps it in Not confirmed.

Recent price changes

22 October 2026 123 Reg: £1.19 a month, when I checked
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 · 123 Reg news.

Not sold on either? Try these

Microsoft 365 Business vs mailbox.org · 123 Reg vs mailbox.org · Microsoft 365 Business vs Proton Mail for Business · 123 Reg vs Proton Mail for Business · Microsoft 365 Business vs Tuta Business · 123 Reg vs Tuta Business

Switching between them

Moving to Microsoft 365 Business · Moving from Microsoft 365 Business. Or see all my switching guides.