Collect the email while the product is out of stock and alert every waiting shopper the hour it returns.
No credit card required.
The shopper is already on the page for a product you are out of. Take the email before they leave, on any variant, from anywhere they land.

When stock returns, the whole waitlist is emailed in one batch, not a slow trickle. Then you watch it pay off: how many you notified, how many came back, and the revenue you recovered.
Not every restock is worth an email. Choose the products, the threshold, and the timing so shoppers only hear from you when it counts.
Every shopper who signs up joins the same contact list the rest of OnVoard works from. Email them anything, ask them for a review after the box arrives, all without exporting a single CSV.
How the platform fits together ›You pay for the shoppers you actually notify. Every plan has every feature, so the free tier collects signups exactly the way the top tier does.
Start on the free tier and upgrade only when you outgrow it.
Very quick and easy to set up. Very good support if you have individual questions. I use all the apps from OnVoard.
Capture the demand while you are out of stock, and let the restock alert close the sale for you.