Sending Back in Stock Product Alert Emails via Klaviyo

Back in Stock alert emails are an important addition to your list of event triggered campaigns. As we all unfortunately know, it’s your best products that tend to sell out first. Once the products come back in stock again, you have a great triggered marketing opportunity.


  1. Swym Pro plan and above
  2. Klaviyo Email Account
  3. Swym-Klaviyo integration enabled

How To Implement

1. Enable Back-in-Stock alert Event

Before you get started, you need to make sure you’ve enabled the back-in-stock alert event within Swym Admin. To confirm, once you’ve logged in to Swym Admin, navigate to Integrations via the left nav. Select Klaviyo to view the configuration settings. Make sure that the checkbox next to “A shopper signing up for a back-in-stock alert” is checked.

Once enabled, Swym will send an event to Klaviyo each time a product subscribed for alerts by your customer comes back in stock.

You can configure the Back in Stock Reminder rule in Swym Admin. Navigate to BiS Product Alerts and click Configure back-in-stock alerts in the Marketing Features section.

2. Create Klaviyo Flow and Select Trigger

In Klaviyo, navigate to the Flows page and select “Create from Scratch”. In this example we’re going to call this flow “Back in Stock Alerts”. 

Next you’ll need to set the trigger for this flow. Choose “Metric” from the choices on the left.

Choose “Swym-backinstock” from the Metric dropdown. You can optionally filter based on any of the attributes passed (outlined in the next section) with this event or to only apply to certain groups of people.

Tip: if you're not seeing "Swym-backinstock" in your dropdown you probably haven't had a user subscribe for a back in stock alert since you enabled the event in Swym Admin. Klaviyo will not display flow triggers until they've received at least one event.

Because the timing of this event isn’t driven by an action taken by the shopper, there’s likely no benefit to adding a time delay before the email is sent.

Next add an email to your flow, this is will be the first back in stock message.

3. Create Your Email Template

Tip: Klaviyo uses the 'Swym-backinstock'event for the Wishlist back in stock feature and for Back in Stock Product Alert subscriptions. For our users who have both the Swym apps installed (Wishlist Plus and Back in Stock Product Alerts), there is no way to differentiate this event between the two apps. We recommend using a more generic email content that applies to both your Wishlist Plus users and Back in Stock alert subscribers.

The next thing we’ll do is build an email template that consumes the back in stock data passed from Swym to create our triggered email campaign. 

Here are the event-level data elements included with the event:

Data Element
Element Label
We used this in our trigger definition
Event Time
UTC time format
Product ID
eCom platform Product ID
Product Name
Navy Peaks Hoodie
Inventory quantity available
Variant ID
Variant Info
Variant SKU
Product URL
Image URL

Select the email object you added to to your flow, and click the “Configure Content” button in the left panel.

If you’ve been using Klaviyo for a while you probably already have your own templates set. For this exercise we’re going to choose the drag and drop method, and then select the “1 Column” template from the Basic tab. We updated the Subject to include the name of the product, which we pulled in dynamically using {{ event.ProductName }}.

Once the “1 Column” template is open you can add your logo to the top if you like or remove the image block. We’ll use the placeholder text block to for the main message content. For this example we’ll keep things simple, centering everything and using html to pull in data from the Swym-backinstock event.

Here’s the html we used for our simple template:

<p style=”text-align: center;font-family:verdana,geneva,sans-serif;”>The {{ event.ProductName }} on your wishlist is now back in stock!&nbsp;</p>&nbsp;

<p style=”text-align: center”><img height=”0″ src=”{{ event.ImageURL }}” width=”400″ /></p>

<p style=”text-align: center”><a href=”{{ event.ProductURL }}”>{{ event.ProductName }}</a></p>

4. Preview the Message

Once you are satisfied with your template and have saved it, you can preview it to make sure everything is working as expected. Klaviyo lets you choose real example events that have flowed over for the preview, so the previews should expose any issues you might be experiencing.

We like to preview first in Klaviyo to make sure everything is working and then check it out in a real inbox. Here’s what our preview looked like:

5. Set Your Email Status to "Live"

When you’re satisfied with your testing the last step is to set your email status from “draft” to “live”. Once that switch is flipped your emails should start flowing!