Klar vs SPAMfighter
What actually differs: where each filter runs, who gets to read your mail, and what it costs.
| Aspect | Klar | SPAMfighter |
|---|---|---|
| Runs on | Your Mac | Your Windows PC, backed by SPAMfighter's network |
| Who can read your mail | No one new during filtering. Classification stays on your device. | The client checks incoming mail and shares user spam reports through SPAMfighter's service |
| Works with | Apple Mail, with any account: IMAP, Gmail, iCloud, Exchange | Outlook, Outlook Express, Windows Mail, Windows Live Mail and Thunderbird |
| Price | Free forever | Free for home use; Pro $29/year |
Klar fits better when you use Apple Mail on a Mac, or you do not want a community-backed filtering service
The honest picks
- SPAMfighter
- A Windows plug-in built around community reports: when one user marks spam, that report helps protect the network. Pick it for a supported classic Outlook or Thunderbird setup. The free edition is for home use and adds a footer to outgoing mail; Pro removes it.
- 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: spamfighter.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.
