Tech stack

Built on proven, boring technology.

No exotic dependencies, no moving parts we can’t reason about. The kind of stack you want holding your email — fast, typed, and hard to surprise.

Language
TypeScript

One typed language end to end — fewer seams, fewer surprises.

Interface
Next.jsReactTailwind

The dashboard and this site — fast, static where it can be.

Service
FastifyNode.js

A fast, fully-typed API. Boring in the best way.

Data
PostgreSQL

Durable and relational. Jobs run on the same trusted store.

Edge
Cloudflare

Open-tracking runs at the edge, close to your recipients.

Cloud
Google Cloud

Runs on Google’s infrastructure, auto-scaling and managed.

In Gmail
Chrome (MV3)Workspace add-on

Two thin surfaces that meet you where you already work.

Intelligence
Anthropic Claude

Powers AI auto-respond — bring your own key, you approve sends.

Choices you can stand behind at 3am.

Every piece here is widely used, well understood, and battle-tested by teams far larger than ours. When something breaks, the answer is a search away — not a spelunking expedition. That reliability is the whole point: your follow-ups have to fire whether or not anyone’s watching.