Notes on inbox
intelligence.

Thinking out loud about email, AI, productivity, and building Inbox Copilot.

Featured · June 5, 2026
The seam between email and calendar that nobody fixed.
8 min read · Product
Product

Every other AI email tool focused on drafting faster or sorting better. We kept asking a different question: where does work actually get dropped? The answer was not in the inbox. It was in the seam between the inbox and the calendar.

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Security
Security

Why we never store raw email body text

The architecture decision we made on day one — and why it's harder to build around than you'd think.

May 28, 20265 min read
Product
Product

The $526 hiding in your inbox

We ran the numbers on our beta cohort. The average user had 3 unused subscriptions they'd forgotten.

May 20, 20264 min read
AI & Design
AI & Design

What 'sounds like you' actually means for AI drafts

Tone, length, sign-off, deadline specificity — the eight signals we extract to mirror your voice.

May 12, 20266 min read
Research
Research

Why detect-approve-execute isn't just a safety feature

We interviewed 40 users who'd tried agentic tools that acted without approval. It changed our product.

April 30, 20267 min read
Product
Product

Introducing the inbox health score — and why it's a habit loop

No competitor has a health score. Here's why we built it first and what 0-100 measures.

April 5, 20264 min read

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