Quartz
Mac email client for Gmail whose on-device AI sorts mail by importance and drafts replies in your voice.
Quartz is a Mac email client for Gmail, in public beta, whose AI runs on your Mac to sort every message by importance and draft replies that sound like you. It is free for beta users, and its terms say paid plans may be introduced later, with any fees disclosed in advance.
About Quartz
Quartz sorts every message by an importance you define, learned over time: important mail gets the room it deserves, inbox items stay scannable, and FYI, Icebox and Noise collapse out of the way. To reply, you give Quartz a few bullet points, and it drafts in your cadence, phrasing and level of warmth, using what it learns about the way you write, your relationship with the sender and the context of the thread.
The model that sorts the inbox and drafts replies runs locally on your Mac, and the homepage says classification and drafting run on Apple Silicon only. Quartz says your mail is never uploaded, that there are no servers that could read it, that mail is encrypted on your device with keys only you hold, and that the app is CASA Tier 2 certified under Google's Cloud Application Security Assessment.
The privacy policy describes an optional mode, off by default, that sends message text to a third-party AI provider whose credentials you supply. During the public beta the app sends product analytics to PostHog tied to the email address you connect, which cannot be turned off in the app; the policy says message content, subject lines and contacts are not sent. Quartz is a product of datarockets, and its policies name Red Panda Technology Inc, of Ontario, Canada.
Sources: quartzmail.ai, /privacy, /terms and /contact, read 2026-10-27
Quartz pros and cons
Pros
- Classification and reply drafting run on your Mac by default, and Quartz says your mail is never uploaded.
- Drafts start from a few bullet points and follow the way you write.
- It is free during the public beta.
- Low-priority mail is grouped into FYI, Icebox and Noise instead of filling the inbox.
Cons
- It needs a Mac with Apple Silicon, and the public beta connects to Gmail.
- Beta analytics tied to your email address cannot be turned off during the beta.
- The terms describe a pre-release beta that may be changed or withdrawn without notice, and keep the right to add paid plans.
- The homepage offers a Mac download only, with no Windows version.
Tagged
- Self-hostable
- Web-based
Quartz alternatives
The closest alternatives to Quartz.
- 01Freemium →Shortwave
AI email client for Gmail and Google Workspace with an agent that searches, sorts and writes in your voice.
- 02Paid →Superhuman
Fast email client with AI replies, summaries, instant reminders, and split-inbox triage.
- 03Freemium →Inbox Zero
Open-source email client for Gmail and Outlook with paid AI that labels mail and drafts replies in your voice.
Related reading
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</a>Frequently asked questions
- What is Quartz?
- Quartz is a mac email client for Gmail whose on-device AI sorts mail by importance and drafts replies in your voice.
- Is Quartz free?
- Quartz is free to use. There is no paid tier as of the last index update.
- What platforms does Quartz support?
- Quartz's own site lists it for macOS.
- What are the alternatives to Quartz?
- The closest alternatives to Quartz are Shortwave, Superhuman, Inbox Zero.
- What are the downsides of Quartz?
- It needs a Mac with Apple Silicon, and the public beta connects to Gmail. Beta analytics tied to your email address cannot be turned off during the beta. The terms describe a pre-release beta that may be changed or withdrawn without notice, and keep the right to add paid plans. The homepage offers a Mac download only, with no Windows version.
- Is Quartz free?
- Quartz is free for beta users. Its terms say the service is currently provided without charge and that any future fees will be disclosed in advance.
- Does Quartz send my email to AI providers?
- Not by default: classification and drafting run on your Mac, and the homepage says your emails are never shared with AI providers. The privacy policy describes an optional mode, off by default, that sends message text to a third-party AI provider you choose and supply credentials for.
- Which email accounts and computers does Quartz support?
- The public beta is labeled Mac and Gmail: you download the app for Mac and connect your Gmail account, and the on-device AI needs Apple Silicon.
- Who makes Quartz?
- Quartz's contact page says it is a product of datarockets, and its privacy policy and terms name Red Panda Technology Inc, of Ontario, Canada.
- What data does the Quartz beta collect?
- Product analytics go to PostHog and are tied to the email address of the account you connect. The privacy policy says message content, subject lines, the addresses of people you write to and your contacts are not sent.