Alternative
A private alternative to Microsoft 365
Klar filters spam on your Mac, inside Apple Mail. No account, no cloud, nothing to hand over.
If you are weighing up Microsoft 365, here is how Klar differs and where each one is the better pick.
| Aspect | Klar | Microsoft 365 |
|---|---|---|
| Runs on | Your Mac | Microsoft's cloud |
| Who can read your mail | No one new. Your mail never leaves the device. | Microsoft processes your mail to filter it |
| Works with | Apple Mail, with any account: IMAP, Gmail, iCloud, Exchange | Microsoft 365 and Exchange Online mailboxes |
| Price | Free | Included |
Klar fits better when You want a second, local pass you control, for work and personal accounts alike
The honest picks
- Microsoft 365
- Exchange Online Protection is on for every Microsoft 365 mailbox and your admin manages it. On a work account, that decision is usually made for you. Klar still helps with what reaches Apple Mail.
- Klar
- Pick Klar if you read mail in Apple Mail and want a modern multilingual model that runs entirely on your Mac. No account, no cloud, nothing to hand over.
Product and price details from the vendors' public pages, July 2026: c-command.com, sanebox.com, support.google.com, learn.microsoft.com, libraesva.com, spamassassin.apache.org, rspamd.com, mailinblack.com. Klar is not affiliated with or endorsed by any vendor named here; names are used only to identify the products.
The on-device option
Free, private, in Apple Mail.
