Slide AI
Shopify app — AI shopping assistant and slide cart · 2025–26
NINE15's own Shopify app: a slide-out cart, an AI shopping assistant trained on the store, product recommendations and quizzes — all in one panel that never takes the shopper off the page.
The problem
NINE15 had spent years building the same cart improvements for client after client — free-shipping bars, quick add, cross-sells, slide carts — on stores like 100 Percent and Criquet. Each one was custom work for a single store. Shoppers also kept leaving to find answers: a question about a product, a policy or an order meant a search, a help page or an email, and many never came back to the cart.
What I built
Slide packages that playbook into one app any Shopify store can install. As a developer at NINE15 I work on the app alongside the team. The slide cart has a free-shipping bar, upsells, coupon codes, gift notes, a shareable cart and checkout buttons, and works with Loop, Redo, GovX ID and Shop Pay. Slide Chat is an AI assistant trained on the store's products, blog posts, policies and orders, which answers questions and adds products to the cart from the conversation. Recommendations come from an AI engine or the merchant's own picks, matched to what's already in the cart, and quizzes match shoppers to the right product and send their answers to Klaviyo.
How it feels to shop
Everything opens in the same slide-out panel, so shoppers ask a question, see suggestions and check out without a page reload. The chat answers like a good shop assistant — "looking for sunglasses" gets a short reply and products with an add-to-cart button. The cart shows how close the shopper is to free shipping and suggests items that go with what's already in it. Merchants style it to their brand with settings and custom CSS, and it works with any Shopify theme.
Result
Cart and conversion work that used to be rebuilt for each client is now one app on the Shopify App Store, which any merchant can install and set up themselves.
Stack: Shopify App, Admin API, Storefront API, Theme app extensions, AI chat, Klaviyo, Loop, Redo, GovX ID, Shop Pay