Quartz - Email Client That Learns Your Voice

Privacy-first AI email that learns your voice and runs on your Mac.

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Updated Jul 2026 · Added Jul 2026

quartzmail.ai

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What is Quartz?

Quartz is an AI-native email client that runs entirely on your Mac, using local AI to prioritize important messages and draft personalized replies. It processes all data on-device - your emails never leave your computer or reach external servers - ensuring complete privacy. Built for professionals who want focused inboxes without sacrificing sender personality in AI-drafted responses.

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Key Features of Quartz

On-device AI processing
Auto-categorization by importance
Personalized email drafting
End-to-end encryption
Local language model
Inbox collapsing (FYI, Icebox, Noise)
Gmail integration
Apple Silicon native

Who Should Use Quartz?

Reduce email overwhelm for busy professionals

Draft replies that match your communication style

Maintain focused inbox with smart categorization

Protect email privacy with local processing

Quartz: Pros & Cons

✓Pros

Runs entirely on your device - no cloud uploads
Drafts sound like you, not generic AI
End-to-end encrypted
Gmail integration available
Independently audited and CASA Tier 2 certified
Learns your writing style over time

✕Cons

Requires Apple Silicon Mac
Currently Mac-only (public beta)
Requires Gmail account

Frequently Asked Questions about Quartz

Does Quartz upload my emails to external servers?

No. Quartz runs entirely on your Mac and processes all emails locally using an on-device language model, so your messages never leave your computer or reach external servers. The email client is end-to-end encrypted and has been independently audited and certified CASA Tier 2.

Will AI-drafted replies in Quartz sound generic or will they match how I write?

Quartz learns your writing style over time and drafts personalized replies that sound like you rather than generic AI output. The local language model picks up on your communication patterns the more you use it.

Can I use Quartz if I don't have an Apple Silicon Mac?

Quartz requires an Apple Silicon Mac and is currently available only on macOS in public beta. If you use an Intel Mac or Windows, it is not compatible right now.

How does Quartz organize a crowded inbox?

Quartz auto-categorizes emails by importance and collapses your inbox into three buckets: FYI, Icebox, and Noise. This lets you focus on what actually needs your attention while keeping lower-priority messages organized and searchable rather than deleted.