Upsell (flow or campaign): best practices
Last updated: April 20, 2026
Why in-email upsells?
In-email upsells are only for subscription-based customers and "swap" a SKU or selling plan to a SKU or selling plan that is more valuable. Some example uses include:
Upselling from monthly to quarterly plans
Offering bundles that include items a customer is already subscribed to
The specific use cases other than the upcoming order email will be highly brand-dependent, but as a general rule, high-performing offers see between a 1% - 2% take rate.
What you'll be building:

Need ideas?
How to set up and use the swap-up block
To get the most out of Zaymo in promotional campaigns, make it a regular part of your campaign planning process and workflow.
Create your non-interactive template in Klaviyo
This template will be used as a fallback for customers who aren't able to view interactive emails
Identify opportunities throughout your customer journeys
Zaymo is built to work across flows and campaigns, with a focus on re-engaging current and past subscribers since they can complete actions 100% in-email
Purchase actions do not need to be attached to an upcoming order email
Build in Zaymo
Import your template from Klaviyo into Zaymo
Add the Zaymo block(s) into the email
The 📄 Swap upblock allows for multiple swap options to be configured. The first swap option in the list which applies to a given customer will be the one shown to them
If none of the options apply to the customer, the block will not be shown unless an "empty state" is configured. The simplest approach is to make the "empty state" the same image used in your fallback
Delete any repetitive or non-applicable elements
Customize the block to match your brand
Export back to Klaviyo
Click on "Preview / Export"
In the previewer, view the email and ensure that it looks as expected on desktop vs mobile, and Apple vs Gmail. You can also send yourself test emails to review
Once you're satisfied with the appearance, export the template to Klaviyo
If you'd like to run an A/B test, export the template as an A/B test. More info here: 📄 How to use a Zaymo in-template A/B test
Add your new template into the flow or campaign
Examples & best practices
Annotated example
![]() | Well-timed offers drive results: prompting a quarterly upgrade once a customer hits that milestone reinforces the value and savings they’re missing Keep your CTA singular and focused |
![]() | For some brands, upselling can be more effective than cross-selling on upcoming order emails When offering bundles, highlight the fact that the bundle includes the customer's current subscription item(s) Applying a discount to your upsell can make it seem like a 'no-brainer' for customers |

