Quartz turns Gmail into a focused inbox. It sorts every message by importance, and learns what matters to you over time. When you reply, it drafts in your own voice. And the AI runs entirely on your own Mac, so your mail stays end-to-end encrypted and never shared with AI providers.
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Quartz is a Mac-native email client that transforms Gmail into a focused inbox. It uses on-device AI to automatically sort every message by importance, learning what matters to you over time. When you reply, Quartz drafts responses in your own voice—your cadence, phrasing, and warmth. Crucially, all AI processing runs locally on your Mac, so your email stays end-to-end encrypted and is never shared with any AI provider.
Quartz auto-categorizes every incoming message by importance—defined by you and learned over time. Important mail gets the space it deserves, while FYI, Icebox, and Noise items collapse out of sight. Your inbox stays scannable and focused.
The model that sorts your inbox and drafts replies runs entirely on your Mac (Apple Silicon required). Classification and drafting happen locally, so your mail is never uploaded to any server. Quartz has no servers to read your mail.
Your mail is encrypted on your device with keys only you hold. Quartz is CASA Tier 2 certified—independently audited under Google's Cloud Application Security Assessment—so your privacy is verified, not just promised.
Give Quartz a few bullet points about your style. It learns how you write, understands your relationship with each sender, and picks up thread context. Drafts come back in your natural cadence and phrasing—no generic LLM tone.
"Your emails stay private, never shared with AI providers."
This is the core differentiator: Quartz runs all AI processing locally on your Mac, so your email never touches an external server. Most AI email tools upload your messages to train models or generate replies—Quartz does none of that. Combined with end-to-end encryption and independent CASA Tier 2 certification, it offers a rare combination of intelligence and privacy that doesn't compromise on either.
You use Gmail on a Mac with Apple Silicon, want AI-powered sorting and drafting, and refuse to trade your privacy for convenience. Quartz is free for beta users and available now on Product Hunt.
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