Klar vs Microsoft 365
What actually differs: where each filter runs, who gets to read your mail, and what it costs.
| Aspect | Klar | Microsoft 365 |
|---|---|---|
| Runs on | Your Mac | Microsoft's cloud |
| Who can read your mail | No one new during filtering. Classification stays on your 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 forever | 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 and August 2026: learn.microsoft.com. Klar is not affiliated with any vendor named here. No vendor endorses Klar. Product names only identify the tools.
Reclaim your inbox
Spam filter for Apple Mail. Free on the App Store.
