Features

The parts you need to send a good email.

Not the parts that come with a manual. Here's everything day3 does — and, just as deliberately, the bloat it leaves out.

Write the email, choose who gets it, send.

One email to one audience. Compose, test, and send it — all on a single screen. No funnels, no approval maze.

Unlimited subscribers. Plain lists you actually understand.

A named list of subscribers. Import them, add them by hand, and filter by status. Pay the same whether it's 200 or 200,000.

One form, installed anywhere you can paste a snippet.

One form, four ways to install it — hosted, embedded, popup, or raw HTML. Double opt-in keeps your list clean from day one.

Land in the inbox, not the spam folder.

Authenticated domains, one-click unsubscribe, and automatic suppression of bad addresses — all standard, not sold separately.

See what happens after you hit send.

One page for deliverability, reputation, and engagement across every campaign — opens, clicks, bounces, complaints, and unsubscribes, with a per-campaign breakdown.

A writing assistant, when you want one.

Draft a campaign from a short brief, get subject lines and preview text, and rewrite what you highlight. Powered by Claude, and included on every paid plan.

Your lists, over HTTPS.

A REST API for audiences, contacts, fields, segments, topics, and suppressions — built so you can migrate from another provider in one script and keep your app in sync afterwards.

See it before you commit.

Get started How the pricing works