Klar vs SpamHero
What actually differs: where each filter runs, who gets to read your mail, and what it costs.
| Aspect | Klar | SpamHero |
|---|---|---|
| Runs on | Your Mac | SpamHero's cloud, in front of your mail server |
| Who can read your mail | No one new during filtering. Classification stays on your device. | Every message for the domain is filtered on SpamHero's servers; quarantine and archiving hold copies for 7 to 30 days depending on the plan |
| Works with | Apple Mail, with any account: IMAP, Gmail, iCloud, Exchange | A domain's mail flow, including Microsoft 365, Exchange, SmarterMail and self-hosted servers |
| Price | Free forever | From $5/month per domain on a first prepaid year ($60), then $84/year; $8/month monthly. Four tiers, to $99/month. 30-day trial, no free plan |
Klar fits better when you read mail in Apple Mail on an address whose MX records you cannot point somewhere else, such as an @gmail.com or @icloud.com account
The honest picks
- SpamHero
- A gateway priced per domain rather than per mailbox, with unlimited addresses, a shared quarantine, message logs and archiving from 7 to 30 days by tier, mail bagging for 5 days when your server is unreachable, and an outbound relay on the higher plans. Pick it when you run a domain and want one filter in front of every mailbox. It filters a domain, not a person, so it cannot help on a mailbox at someone else's domain.
- 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: spamhero.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.
