Overview
Apple Mail's junk filter misses a lot, especially AI-written scams and phishing. The filters that don't miss too much (Gmail, cloud gateways) read every message you receive on somebody else's server.
Klar is the third option. It runs a real multilingual model (XLM-RoBERTa, 550M parameters) on your Mac: every message is classified in 13 to 44 ms on Apple Silicon, across 100+ languages, and spam is moved to Junk automatically.
The part of Klar that reads your inbox has no network entitlement, so by construction it cannot send your mail anywhere. No account, no cloud, no automatic telemetry; a report leaves only when you send its editable email draft yourself.
Turn on Trust my contacts to keep verified mail from people you know in your Inbox, and choose among three sensitivity profiles (Cautious, Standard, Aggressive) to set the balance between catching spam and protecting real mail. Free on the Mac App Store. macOS 14+, Apple Silicon. Built in the EU.
Klar in a Nutshell
Who is it for?
Mac users who want stronger spam protection without sending their emails to cloud services
Problem
Apple Mail often misses AI generated scams and phishing, while other options read messages on external servers. This creates a gap between privacy and effective filtering, leaving users exposed to unwanted mail. Current solutions either miss spam or require cloud-based processing that users may not trust.
Solution
Klar runs a real multilingual model locally on Apple Silicon to classify mail in 13 to 44 ms, moving spam to Junk without ever leaving the device. It requires no account, no cloud, and no telemetry, with user control over trust and sensitivity settings.
What makes it unique
Klar operates entirely on-device with no network entitlement, ensuring mail data never leaves the Mac. Built-in EU privacy standards and a privacy-first design guarantee that only user-sent editable drafts leave the device. It supports multiple languages and offers adjustable threat sensitivity for personalized filtering.
Use Cases
Filter spam on Mac locally
Protect inbox from phishing
Tune sensitivity for fewer false positives
Trust known contacts to preserve legitimate messages
Run without cloud dependencies
Use multilingual phishing detection
Frequently Asked Questions
What is Klar?
Who is Klar for?
Does Klar offer a free plan?
How does Klar work?
What are Klar's key features?
Which platforms or integrations does Klar support?
How is Klar different from typical cloud-based filters?
Is my data safe with Klar?
How do I get started with Klar?
Does Klar support confidential or sensitive emails?
Can I customize how aggressive the spam filtering is?
Meet the Maker
Maker of Klar · On LaunchIt since 2026
Howdy, I’m Nicolas. I’m a software engineer living in Paris. I am a fan of outdoors, technology, and wine.
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