Alternative
A private alternative to Mailinblack
Klar filters spam on your Mac, inside Apple Mail. No account, no cloud, nothing to hand over.
If you are weighing up Mailinblack, here is how Klar differs and where each one is the better pick.
| Aspect | Klar | Mailinblack |
|---|---|---|
| Runs on | Your Mac | Mailinblack's cloud, or an on-premise gateway |
| Who can read your mail | No one new. Your mail never leaves the device. | Analyzes your organization's mail in its cloud to filter it |
| Works with | Apple Mail, with any account: IMAP, Gmail, iCloud, Exchange | Your organization's mailboxes, in front of the mail server |
| Price | Free | Per-mailbox subscription (quote) |
Klar fits better when You're an individual on Apple Mail, not an organization buying a managed gateway
The honest picks
- Mailinblack
- A French email security service for organizations: gateway filtering, phishing simulation and security training, an admin console. Aimed at companies, not individuals reading mail in 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.
