One cart app to replace them all.

Custo is an easy-to-use upsell app to seamlessly include items in your customer's cart without compromising your site's speed. Set certain tiers that a customer must meet in order to qualify for free gifts or offer bundles and sampling.

The possibilities are endless with Custo.

Run multiple campaigns
at one time.

Increase sales by running multiple
promotions in the cart at once. Set it and
forget it.

Upsell and cross-sell without the guesswork

Use targeted offers in the cart for
upselling and cross-selling to increase
your average order value.

Customize any design for better brand expression.

An easy to install app with no developer
needed. Change the look and feel of the
cart and progress bar to fit your store.


$49.99/Month Plan

Support with up to 500 monthly orders.

74.99/Month Plan

Support with up to monthly 1999 orders.

99.99/Month Plan

Support with unlimited monthly orders.


  • Slide cart with your stores branding
  • Ability to add Free Shipping and Teired Discounts
  • Offer free Bundles in the cart
  • Reward customers with Free Shipping
  • Automatic discoutns on orders
  • Progress bar directly in the cart
  • Seamless integration with your online store
  • Customize the look and feel of the cart