Sold out,
not sold off.

Backy captures shoppers the moment a product runs out, then emails them when it's back — from your own provider, with no per-notification fees.

Get started How it works
$0
per-notification fees
5 min
to set up
Your
domain & provider
Sold out

Aurora Merino Knit

$148.00 · Forest / M

No caps

Capture demand

A “Notify me” button appears on every sold-out variant and builds your waiting list.

Auto-notify

The instant you restock, every waiting shopper is emailed automatically — no manual step.

Send your way

Connect your own provider — emails come from your domain, with no per-send fees.

Setup

Live in a few minutes.

No code, no theme edits, no developer.

1

Install

Add Backy from the Shopify App Store and open it from your admin.

2

Connect email

Paste an API key from your provider in Settings.

3

Add the widget

Drop the “Back in Stock” block onto your product page.

4

Restock

Shoppers are emailed automatically when stock returns.

Email providers

Bring your own provider.

Grab an API key, paste it into Settings, and you're sending from your domain.

Postmark

  1. Open your Server.
  2. Go to API Tokens.
  3. Copy the Server API Token.
Get Postmark token

SendGrid

  1. Open Settings → API Keys.
  2. Create a key with Mail Send.
  3. Copy the key.
Get SendGrid key

Mailgun

  1. Grab your Sending API key.
  2. Note your domain.
  3. Note your region (US/EU).
Get Mailgun key

Mailtrap

  1. Open Sending Domains.
  2. Go to API Tokens.
  3. Copy your API token.
Get Mailtrap token

Amazon SES

  1. Create an IAM user with ses:SendEmail.
  2. Copy the access key + secret.
  3. Note your region (e.g. us-east-1).
Open AWS SES console
Paste your key in Backy → Settings → Email provider. We verify it instantly and store it encrypted. Make sure your “from” address is a verified sender on that provider.