Complementary Products is a CollectAction module that automatically suggests items that complete the product a visitor is viewing. Someone looking at a camera sees a memory card and a bag; someone viewing a shirt sees matching trousers and a belt; someone browsing a coffee machine sees beans and cups. The goal isn't an alternative that replaces the product, but items that are used together with it.
Why complementary product recommendations?
Shoppers often don't think about the other pieces they'll need to use a product, or don't want to search for each one separately. Complementary suggestions surface that need at the moment of purchase: the customer gets a complete order, and you grow basket size through cross-selling. Set up well, these suggestions feel like a helpful service rather than sales pressure.
How does it work?
- Product relationships: The module identifies product groups that complete the viewed item based on its category and attributes.
- Automatic suggestions: Complementary items appear on their own on the product page, in the cart or right after add-to-cart.
- You stay in control: Fine-tune in the panel which categories complement each other and promote specific products.
- Stock sync: Out-of-stock items are never suggested.
Similar vs. frequently bought together vs. complementary
- Similar Products: Alternatives bought instead of the viewed item (another shirt).
- Complementary Products: Items used with the viewed item (trousers and a belt for the shirt); based on product relationships.
- Frequently Bought Together: Items that actually landed in the same basket as this product in past orders; based on order data.
- You May Also Like: Alternatives the visitor may want to explore, based on their browsing behavior.
Example use
- Electronics: A bag, mouse and sleeve on a laptop page.
- Fashion: Matching shoes and a bag on a dress page; for outfit-led scenarios, pair it with Shop the Look.
- Beauty: Conditioner and a hair mask from the same line on a shampoo page.
- Home: Pillows and a throw alongside a bedding set.
Which e-commerce platforms does it work with?
With a single-line script it works with every platform, including Ticimax, IdeaSoft, ikas, T-Soft, Faprika, Akinon, Shopify, WooCommerce and custom software. It stays in sync with your product catalog and order data, with no theme or code changes required.
Related modules
Combine complementary suggestions with Show Remaining Amount for Free Shipping to steer customers toward items that reach the threshold, and make one-tap adding easy with the Quick Add to Cart Button. For your own matching rules, see Recommender Maker. Related guide: outfit selling and basket size.
Get started today
Start turning every product page into a cross-sell opportunity today. No code, live in one day. Contact the CollectAction team for a 15-minute demo.