AI email assistant review
Quartz Mail review
Best for: Individual Apple Silicon Mac users whose primary mailbox is Gmail and who value local-by-default AI for inbox prioritization and human-reviewed reply drafting.
Our review
The full take on Quartz Mail
Quartz Mail is an active public-beta Gmail client for Apple Silicon Macs that uses local AI to prioritize messages and draft replies from user-provided bullet points. It is best suited to an individual Gmail user who wants AI triage and drafting without sending message content to a cloud model by default. It is too early and too narrowly supported to present as a proven general-purpose assistant: independent feedback is limited, post-beta pricing is unknown, mandatory beta telemetry is tied to the connected Gmail address, and the public product page does not establish Outlook, Windows, Android, team, or shared-inbox support.
Features and fit
What Quartz Mail does
Categorizes messages by learned importance; gives important messages more prominence while collapsing FYI, Icebox, and Noise categories; shows AI summaries in the inbox design; drafts replies from bullet points using thread context, the sender relationship, and learned writing style. The public evidence does not establish autonomous sending, scheduling, calendar actions, workflow automation, or shared-inbox features.
Product type
Proprietary local-first macOS email client in public beta; no public source repository was found.
Email and platform support
The current product page advertises Gmail on Mac. AI processing requires Apple Silicon. The legal policies contemplate macOS and iOS applications, but the current homepage and download flow only establish the Mac beta; do not list iOS as currently available without separate release evidence.
Pricing
Plans and cost
Currently provided without charge during the public beta. The terms reserve the right to introduce paid functionality or subscriptions, but no post-beta price is published.
Free plan or trial
Free public beta. This should not be described as a permanent free plan.
Privacy and security
What happens to your email data
Email authorization tokens, cached mail, attachments, and related metadata are stored locally. On-device AI is the default and keeps message text on the device for inference. Users may optionally configure a third-party AI provider, which sends relevant message text to that provider at the user's direction. Mandatory beta analytics send the connected Gmail address, an installation identifier, environment metadata, and behavior events to PostHog, but the policy says message content, subjects, correspondent addresses, attachments, message metadata, labels, folders, and contacts are excluded. The homepage also claims end-to-end encryption and CASA Tier 2 certification; no independent assessment report was found, so retain attribution when publishing those claims.
Security certifications and data-handling commitments are attributed to the vendor unless the supporting audit artifact was independently reviewed.
Independent signal
What users are saying
No meaningful, on-entity Quartz Mail conversation appeared in the 30-day engine results. The highest-ranked quartz results were about minerals, countertops, a voice-memo app, and a generic metaphor; category-level local-AI and email posts did not mention Quartz Mail and must not be used as product sentiment. The usable feedback is the June 17 launch and its two Product Hunt reviews, which sit outside this run's 30-day window.
No meaningful recent named-product signal; weak early launch signal outside the coverage window.
2026-07-10 through 2026-08-09
Quartz launched on Product Hunt with 272 points, 402 followers when checked, two reviews, and a number-four product-of-the-day result
Confirms a public launch and initial interest, but two reviews are not broad customer validation
One reviewer praised the local-AI concept but requested multiselect and clearer shortcut discovery; a maker said version 0.1.83 documented shortcuts and multiselect remained on the roadmap
Supplies concrete early workflow limitations and a maker-confirmed roadmap item
A second reviewer said Quartz reduced inbox noise but wanted clearer unread indicators across categories
Early evidence that the prioritization model is appealing while category-state UX remains immature
A maker launch post described the product as free beta software and received four Reddit points plus a generic congratulatory reply
Confirms launch positioning but provides almost no independent user validation
An independent overview identifies Mac/Gmail scope, beta maturity, and unknown future pricing as the key watch items
Corroborates the practical limits, though it appears source-synthesized rather than a documented hands-on test
A third-party review publishes implementation details such as model, framework, update size, and category limitations that current first-party pages do not corroborate
Useful lead for vendor verification, but unsafe as a source for publishable technical claims
Limitations
What to know before choosing Quartz Mail
- Name collision is severe: Quartz alone maps to a mineral, watch movements, countertops, Quartz Media, a voice-memo app, and other software. Use Quartz Mail in the title and quartzmail.ai in research queries and structured data.
- Beta reliability is explicitly unproven: The terms warn that the pre-release service may contain errors, may not operate reliably, and may be changed or withdrawn. The directory should carry an Early access or Public beta badge.
- Mandatory identity-linked analytics: The connected Gmail address and behavior events are sent to PostHog and cannot be disabled during beta. This does not negate local email-content processing, but it materially qualifies a broad privacy-first pitch.
- Absolute privacy copy needs nuance: The homepage says email is never shared with AI providers, while the policy allows an optional, user-selected third-party AI mode that transmits relevant message text. Publish local by default, not never leaves your device without the opt-in caveat.
- Certification not independently verified: The homepage claims CASA Tier 2 certification, but this research did not find the audit or certification artifact. Attribute the claim to Quartz until verified.
- Narrow compatibility: Only Gmail on Apple Silicon Mac is established by the current public product page. Legal references to iOS are not release evidence, and no Outlook, Exchange, IMAP, Windows, Android, shared-inbox, or admin support was verified.
- No public changelog or repository found: A current versioned download and a maker's Product Hunt reply support ongoing iteration, but release notes, source code, issue tracking, and a documented security architecture were not found.
- Independent evidence is thin: Product Hunt has only two reviews, the Reddit launch post has negligible discussion, and the 30-day research engine found no on-entity signal. Do not infer reliability, adoption, or user satisfaction from launch rankings.
- Third-party technical claims are unverified: Directory pages that name the local model, framework, model-download size, or detailed learning algorithm should be treated as research leads unless Quartz confirms them in first-party documentation.
- Category boundary: Quartz is a focused email client with AI-assisted triage and drafting, not a verified autonomous agent, sales assistant, customer-support platform, or shared inbox.
Evidence
Sources behind this review
Product facts come from current first-party pages. Independent and community sources are used for context—not as proof of every product claim.
Quartz is a public-beta Mac and Gmail client whose AI classifies messages and drafts replies locally on Apple Silicon
Importance categories include Important, Inbox, FYI, Icebox, and Noise, with lower-priority groups collapsed
Drafting starts from bullet points and uses thread context, sender relationship, and learned writing style
Email tokens and cached mailbox data remain local; the company says it operates no server that receives or processes email content
On-device AI is the default, but users can opt into a third-party AI provider that receives relevant message text
Mandatory beta telemetry sends the connected Gmail address, install ID, environment metadata, and behavior events to PostHog while excluding listed mail content and metadata fields
The service is currently free; future paid functionality or subscriptions may be introduced with advance disclosure
The beta may contain errors, may not operate reliably, and may be changed or withdrawn
The homepage claims end-to-end encryption and CASA Tier 2 certification under Google's Cloud Application Security Assessment
The current download redirect exposed Mac build 0.1.96; the linked storage object reported an August 7, 2026 last-modified date