A private alternative to Clean Mailbox
Klar filters spam on your Mac, inside Apple Mail. No account, no cloud, nothing to hand over.
If you are weighing up Clean Mailbox, here is how Klar differs and where each one is the better pick.
| Aspect | Klar | Clean Mailbox |
|---|---|---|
| Runs on | Your Mac | Clean Mailbox's infrastructure in France |
| Who can read your mail | No one new during filtering. Classification stays on your device. | Inspects every incoming message before forwarding clean mail to your server |
| Works with | Apple Mail, with any account: IMAP, Gmail, iCloud, Exchange | Any domain and SMTP server, including Google, Microsoft, OVH and self-hosted mail |
| Price | Free forever | From €3.29/month per domain for 6,000 messages |
Klar fits better when you are an individual who wants local filtering in Apple Mail without changing a domain's MX records
The honest picks
- Clean Mailbox
- A French gateway that filters mail for a whole domain. It blocks spam, malware, phishing, spoofing and risky attachments. It also gives admins quarantine controls. Pick it for business protection across all users. Klar solves the narrower personal inbox problem on the Mac.
- 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: clean-mailbox.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.
