Shopify app comparison
UpsellPlus Checkout Upsells vs Cartly
Choose UpsellPlus Checkout Upsells when you have enough eligible orders to test several offer placements. Choose Cartly when your current cart limits merchandising and reassurance. Choose neither if your current setup already does enough or the expected improvement would not justify the extra cost and work.
UpsellPlus Checkout Upsells
You have enough eligible orders to test several offer placements. A specialist upsell platform for teams that want controlled offers across product, cart, checkout and post-purchase journeys.
Setup: Light setup
Affiliate link. It never affects our advice.
Cartly
Your current cart limits merchandising and reassurance. A cart drawer and upsell app for stores that want progress rewards, add-ons and checkout prompts in one cart experience.
Setup: Moderate setup
Affiliate link. It never affects our advice.Neither yet?
Wait if the upsell and cross-sell problem is still occasional, your current setup already handles it or your team does not have time to use either app well.
See the simpler starting point →The differences that matter
Swipe the table to see both apps →
| What to check | UpsellPlus Checkout Upsells | Cartly |
|---|---|---|
| What you get | Product, cart, checkout and post-purchase offers, Targeting and AI recommendations, Subscription upgrades | Custom cart drawer, Cart upsells and add-ons, Progress and free-shipping bars |
| Important limitation | Some checkout changes depend on Shopify plan eligibility. | Replacing the theme cart can affect several customer journeys. |
UpsellPlus Checkout Upsells is the stronger fit when:
- You have enough eligible orders to test several offer placements
- Checkout and post-purchase optimisation are priorities
- A conversion owner will review tests and exclusions
Cartly is the stronger fit when:
- Your current cart limits merchandising and reassurance
- You have relevant add-ons or a useful free-shipping threshold
- You will protect cart speed and checkout clarity
What will you actually pay?
UpsellPlus Checkout Upsells
Free plan availableFree includes a limited offer up to $500 upsell revenue. Paid plans unlock different surfaces and revenue allowances. Check Shopify Plus requirements for checkout customisation.
Pricing checked 2026-09-07Check official pricing ↗Cartly
Free for up to 20 total store ordersPaid tiers cover up to 100, 300 and 750 monthly store orders. Free development-store access is separate from live-store eligibility.
Pricing checked 2026-09-07Check official pricing ↗You might not need either yet
Wait if the upsell and cross-sell problem is still occasional, your current setup already handles it or your team does not have time to use either app well.
- You only need a basic product-page add-on
- Your theme cart already does the required job
- The problem is still occasional, your current setup already handles it or neither app would create enough value to justify the extra cost and work.
Ready to set it up?
Start with one useful feature and test the customer journey before switching on more.
Set up UpsellPlus Checkout Upsells
Use UpsellPlus Checkout Upsells for a controlled first use case and expand only after the result is proven.
- Choose one placement
- Build the offer rules
- Test the journey
- Run a measured pilot
Set up Cartly
Use Cartly for a controlled first use case and expand only after the result is proven.
- Define the first job
- Configure the smallest useful version
- Check the connected journey
- Run realistic tests
Checks that apply to either app
- The complete customer and operational journey works on mobile and desktop.
- Required Shopify data and integrations update once and in the intended place.
- A person responsible can resolve common failures without unsafe access or manual workarounds.
- The measured value is compared with software cost, team time and new support demand.
Common questions
Is UpsellPlus Checkout Upsells better than Cartly?
Not automatically. UpsellPlus Checkout Upsells is the better fit when you have enough eligible orders to test several offer placements. Cartly is the better fit when your current cart limits merchandising and reassurance.
Which is easier to set up: UpsellPlus Checkout Upsells or Cartly?
UpsellPlus Checkout Upsells is currently classed as light setup, while Cartly is moderate setup. The real effort depends on your data, integrations, theme and the number of workflows you enable.
How should I test UpsellPlus Checkout Upsells against Cartly before committing?
Choose one real customer journey and one measurable outcome. Complete the same checks for both options, including the complete customer and operational journey works on mobile and desktop. and required shopify data and integrations update once and in the intended place., then compare the result and the work your team had to do.
What should I measure after choosing UpsellPlus Checkout Upsells or Cartly?
Record the current result before launch, then measure the customer outcome the app is meant to improve alongside app cost, support demand, errors and the time required to run it. Keep the app only when the total value is clear.
Can I switch between UpsellPlus Checkout Upsells and Cartly later?
Usually, but switching can affect settings, customer data, theme placements, integrations and reporting. Export what you can, document the current setup and test the replacement before removing the original app.
Still comparing?
All upsell and cross-sell options →Sources and independence
Based on official app listings and vendor documentation, not a claim of hands-on testing of every feature. Affiliate relationships do not decide which app we recommend.
Read our methodology