Shopify upsell and cross-sell comparison

Selleasy vs Cartly: choose by fit, not feature count.

Both options help with upsell and cross-sell, but they suit different stores and ways of working. Start with the problem you need to solve and the result you expect before comparing features.

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Researched and reviewed by Matt CockingUpdated 21 August 20267-minute read

The verdict

Which route sounds most like your store?

Choose Selleasy when you sell obvious product pairs, accessories or replenishment add-ons. 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.

Choose Selleasy when

Selleasy

You sell obvious product pairs, accessories or replenishment add-ons. A practical choice for stores that want frequently bought together, add-ons and in-cart offers without starting with a complex funnel.

Affiliate link. It never affects the verdict.
Choose Cartly when

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.

Affiliate link. It never affects the verdict.
Wait before choosing either

Neither app is the next step

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 what to fix first

Best fit

Choose the statement closest to your store.

Selleasy is the stronger fit when:

  • You sell obvious product pairs, accessories or replenishment add-ons
  • You want several common upsell placements with a lower setup burden
  • You need multi-language or multi-currency compatible offers
Read the Selleasy guide

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
Read the Cartly guide

At a glance

The differences that should affect your decision.

Use this to narrow the choice, then verify current pricing and compatibility before installing anything.

What mattersSelleasyCartly
Best fitYour needs decide this

SelleasyYou sell obvious product pairs, accessories or replenishment add-ons

CartlyYour current cart limits merchandising and reassurance

Primary jobYour needs decide this

SelleasyIts core job is presenting relevant complementary products before and after checkout.

CartlyIts core job is improving the cart experience while presenting relevant add-ons and spend incentives.

What you getYour needs decide this

SelleasyFrequently bought together offers, Product add-ons and in-cart upsells, Post-purchase offers

CartlyCustom cart drawer, Cart upsells and add-ons, Progress and free-shipping bars

Important limitationYour needs decide this

SelleasyCheckout blocks depend on Shopify checkout eligibility.

CartlyReplacing the theme cart can affect several customer journeys.

Price when reviewed

SelleasyFree to installOrder-volume tiers

CartlyFree plan availableMonthly order tiers

Setup effort

SelleasyLight setup

CartlyModerate setup

Practical setup plan

See what choosing each app asks you to do.

These are the minimum steps for a controlled launch. The full app guides contain the detailed walkthroughs.

If you choose

Selleasy

Use Selleasy for a controlled first use case and expand only after the result is proven.

  1. Map complementary products
  2. Create one offer type
  3. Style and place the widget
  4. Run test orders
Open the full Selleasy setup guide
If you choose

Cartly

Use Cartly for a controlled first use case and expand only after the result is proven.

  1. Define the first job
  2. Configure the smallest useful version
  3. Check the connected journey
  4. Run realistic tests
Open the full Cartly setup guide
Whichever you choose

Complete these checks before launch

  • The complete customer and operational journey works on mobile and desktop.
  • Required Shopify data and integrations update once and in the intended place.
  • A named owner can resolve common failures without unsafe access or manual workarounds.
  • The measured value is compared with software cost, team time and new support demand.

Before you spend

Wait if any of these sound familiar.

Buying an app will not solve these gaps. Complete the checks below first, then return to the comparison with a clearer brief.

  1. 01

    You need advanced experimentation across a complex funnel

  2. 02

    Your theme cart already does the required job

  3. 03

    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.

Not sure whether your store is ready?

The free assessment shows what deserves attention now and what can wait.

Check my priorities

Your next route

Research, try or get a store-specific answer.

Selleasy

You sell obvious product pairs, accessories or replenishment add-ons. A practical choice for stores that want frequently bought together, add-ons and in-cart offers without starting with a complex funnel.

Starting price
Free to install
Setup
Light setup
Affiliate link. Commission never affects StackFit recommendations.

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.

Starting price
Free plan available
Setup
Moderate setup
Affiliate link. Commission never affects StackFit recommendations.

Not ready to choose?

Find out what your store needs first.

Use the free assessment to see whether this category deserves attention now.

Get my free result

Frequently asked questions

Common questions before you decide.

Is Selleasy better than Cartly?

Not automatically. Selleasy is the better fit when you sell obvious product pairs, accessories or replenishment add-ons. Cartly is the better fit when your current cart limits merchandising and reassurance.

Which is easier to set up: Selleasy or Cartly?

Selleasy 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 Selleasy 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 Selleasy 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 Selleasy 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.

View the official sources used for this comparison

Pricing and product features can change. Check the current app listing before purchasing. Affiliate availability never affects the comparison.