Changelog

Signup forms

June 22, 2026

One form definition, installed four ways: a hosted page for people without a site, an auto-resizing embed for people with one, a popup, and raw HTML for anyone who wants to style it themselves. Double opt-in is on by default, which keeps typos and bot signups off the list.

What shipped

Collect subscribers with hosted newsletter signup forms. No site required.
Drop a lightweight widget onto your own site for inline or popup forms, or take the raw HTML and style it yourself.

More about day3

All featuresEverything day3 does, and the things it deliberately doesn't.Read on
GuidesPractical writing on deliverability, authentication, compliance, and email pricing.Read on
PricingNine plans from $1/mo for 1,000 emails to $220/mo for 1,000,000. Unlimited subscribers on all of them.Read on
APIOne REST API for your app's transactional email, your audiences, and your campaigns, plus an MCP server that turns your AI editor into a composer. Built so migrating from another provider is one script and staying in sync afterwards is a webhook handler.Read on
How send-based pricing worksWhat counts as a send, what happens at the monthly cap, and why list size never moves the bill.Read on
DeliverabilityAuthenticated domains, one-click unsubscribe, and automatic suppression of bounces and complaints.Read on

Try what shipped.

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