Klar vs Spam Reader
What actually differs: where each filter runs, who gets to read your mail, and what it costs.
| Aspect | Klar | Spam Reader |
|---|---|---|
| Runs on | Your Mac | Your Windows PC, inside Outlook |
| Who can read your mail | No one new during filtering. Classification stays on your device. | No new third party. It scans and learns from incoming mail on the PC. |
| Works with | Apple Mail, with any account: IMAP, Gmail, iCloud, Exchange | Microsoft Outlook 2000 through 2024, with Exchange, POP3, IMAP and HTTP accounts |
| Price | Free forever | Free; Pro lifetime license from $39.95 |
Klar fits better when you use Apple Mail on a Mac rather than desktop Outlook on Windows
The honest picks
- Spam Reader
- A focused Outlook add-in with a self-training Bayesian filter, smart allowlists and a review folder. It is the direct pick for Windows users who want filtering inside classic Outlook. After 30 days the free version adds a disclaimer 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: spam-reader.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.
