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New signups to Underline are closed, but I’ve built a successor called Cornflakes. Check it out!

Underline is for sending
email newsletters,
not “campaigns”.

The compose screen of Underline.

Basically just a text box and a send button.

Simple and calm

It’s not for MARKETING, it’s for sending plain-text emails without fussing through a million pages and designs. Maybe you’ll actually send out your newsletter now?

Custom forms

Code your own custom signup form to match your website (or don’t, if that’s not your thing - that’s okay too!).

Import subscribers

If you’ve already got a list built up, you can migrate them over to Underline in a couple clicks without subscribers even noticing.

Automations (coming soon)

Pre-write emails to be sent hours or days after a subscriber signs up. You can even create a shadow newsletter!


Create as many completely separate newsletters as you want, with no extra charge.

Underline is free for up to 1,000 emails per month. When you’re ready for more, $19/month unlocks unlimited emails per month.

Price Comparison

5,000 subscribers 15,000 subscribers
Underline $19/month $19/month
ConvertKit $79/month $149/month
Buttondown $25-$53/month $75-$104/month

Grab a free account and start a newsletter you’ll actually send.

Sign up →

Made by Ben Borgers (benborgers@hey.com)