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AddOnce

Develop by Bison 46 Labs

$99

/ Month

Enhance product pages with seamless optional add-ons integration.

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About AddOnce

Launched Jul 31, 2026

Categories

Upsell and cross-sell

Built by Bison 46 Labs

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Introduction Video

Description

Attach optional add-ons using native products and variants.

AddOnce lets merchants present optional products and services directly on the product page. Create a Companion Product once, then attach it to any product where it belongs. Because AddOnce uses native products, inventory, variants, and fulfillment continue to work as expected. Customers choose optional add-ons before adding to cart, and each item is added as its own native cart line.

AddOnce lets merchants present optional products and services directly on the product page. Create a Companion Product once, then attach it to any product where it belongs. Because AddOnce uses native products, inventory, variants, and fulfillment continue to work as expected. Customers choose optional add-ons before adding to cart, and each item is added as its own native cart line. more
  • Add optional add-ons with native Shopify products
  • Create once. Attach to unlimited products.
  • Customers add each selection as independent Shopify cart lines
  • Automatically supports single- and multi-variant companion products
  • Theme App Extension with zero storefront impact until enabled

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