A private alternative to OpenEFA
Klar filters spam on your Mac, inside Apple Mail. No account, no cloud, nothing to hand over.
If you are weighing up OpenEFA, here is how Klar differs and where each one is the better pick.
| Aspect | Klar | OpenEFA |
|---|---|---|
| Runs on | Your Mac | OpenEFA's cloud, or an on-premise appliance you run yourself |
| Who can read your mail | No one new during filtering. Classification stays on your device. | Scores authentication, sender behavior, links and message intent, and explains the reasoning behind each verdict |
| Works with | Apple Mail, with any account: IMAP, Gmail, iCloud, Exchange | Microsoft 365, Google Workspace, or any mail server, cloud or on-premise |
| Price | Free forever | From $5 per mailbox per month (Secure tier), rising with archiving/retention add-ons |
Klar fits better when you're an individual on Apple Mail, not an organization buying a gateway with per-seat pricing and admin retention policies
The honest picks
- OpenEFA
- An AI email security gateway built for organizations. You can run it in their cloud in minutes, or as an appliance on your own infrastructure. It claims 99% accuracy and explains every verdict instead of just a number. Aimed at IT teams protecting Microsoft 365 or Google Workspace, not individuals reading their own Apple Mail. For a lightweight self-hosted layer, see Klar Pro.
- 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: openefa.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.
