Head to head
Klar vs MailWasher
What actually differs: where each filter runs, who gets to read your mail, and what it costs.
| Aspect | Klar | MailWasher |
|---|---|---|
| Runs on | Your Mac | Your Windows PC |
| Who can read your mail | No one new. Your mail never leaves the device. | Previews mail on the server; junk is deleted before your mail program downloads it |
| Works with | Apple Mail, with any account: IMAP, Gmail, iCloud, Exchange | POP and IMAP accounts, on Windows only |
| Price | Free forever | Free for one address; Pro from $49.95 |
Klar fits better when You read mail on a Mac: MailWasher's own FAQ says it is Windows-only
The honest picks
- MailWasher
- A veteran Windows tool with a distinct approach: inspect mail on the server and delete junk before it reaches your machine, with Bayesian learning and blocklists. On a Windows PC with POP or IMAP it earns its keep. There is no Mac version.
- 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, leavemealone.com, clean.email, mailwasher.net. 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.
