On October 15, 2026, Google launched Universal Cart in the United States across Google Search and the Gemini app. The feature lets a shopper save products from multiple retailers in a single cart, track prices and restocks, and check out through the Universal Commerce Protocol. A shopper can save a handbag from one store in AI Mode, add a sweater from another and lip gloss from a third in the Gemini app, and keep all three in one cart that persists across Google surfaces. Launch partners include Nike, Sephora, Target, Ulta Beauty, Walmart, Wayfair, and many Shopify merchants.
On the surface, this looks like a win for everyone. The shopper gets one cart instead of a dozen tabs. The retailer gets a new discovery and checkout channel reaching Google’s enormous audience. Checkout still ends with the merchant as the seller of record, so the retailer keeps the transaction. Google is careful to emphasize that point. The merchant still sells. The merchant still gets paid.
But look at what moved. The shopper now assembles a basket from many retailers inside Google’s cart, not inside any one retailer’s store. The price tracking, the restock alerts, the savings suggestions, the moment of discovery and comparison all happen on Google’s surface. The checkout still ends with the retailer, but the relationship that leads to the checkout now belongs to Google. That is the trade every launch partner just made, and most retailers signing on have not fully priced what they gave up to be in the cart.
What Universal Cart Actually Moves
The genius of Universal Cart, from Google’s perspective, is that it takes the part of the shopping journey that used to belong to the retailer and moves it to Google, while leaving the retailer with the part that costs money to operate. The retailer keeps fulfillment, payment processing, returns, and customer service. Google takes discovery, comparison, the cart itself, and the price intelligence. The retailer keeps the expensive operational layer. Google takes the valuable relationship layer.
This is the pattern I described in my analysis of how AI agents are unbundling the marketplace. The functions that retailers once bundled together, discovery, comparison, transaction, fulfillment, are coming apart, and different players are capturing different pieces. Universal Cart is that unbundling made concrete. Google is claiming discovery and comparison across every retailer at once, assembling them into a single shopping surface where the shopper lives and Google sees everything. The retailer becomes a fulfillment endpoint that Google routes to at the moment of checkout.
As I described in the Kroger Instacart commerce layer analysis, the strategic question in every one of these integrations is the same. How much of the customer relationship are you comfortable routing through a platform whose interests are not identical to yours? Universal Cart asks that question at the scale of Google’s entire shopping ecosystem, and it asks it of every retailer at once.
Why Retailers Are Signing On Anyway
The Traffic Is Real and the Timing Is the Holiday Season
The retailers joining Universal Cart are not making a foolish decision. The traffic is real. As I described in the AI recommendations analysis, AI-driven discovery is the fastest-growing channel in retail, and Google Search and Gemini sit at the center of it. A retailer who is not in the Universal Cart when a shopper assembles a basket across three stores is the store that got left out of the basket. In the run-up to the holiday season, that absence is expensive and immediate. The pressure to join is rational.
The problem is not the decision to join. The problem is joining without a clear view of the long-term trade. A retailer can participate in Universal Cart to capture the near-term traffic while understanding exactly what relationship ground they are ceding, and building a strategy to hold on to the customer relationship through other channels. Or a retailer can join reactively, capture the traffic, and wake up in two years having become a fulfillment endpoint for a shopper who now considers Google their store. Same integration. Very different long-term position.
The Seller of Record Is a Comfort That Hides the Shift
Google’s reassurance that the merchant remains the seller of record is true and important, and it is also the detail that makes the shift easy to underestimate. Being the seller of record means the retailer keeps the transaction, the margin, and the direct payment relationship. Those are real and worth keeping. But the seller of record is the last step in a journey whose earlier steps now belong to Google. If discovery, comparison, and cart assembly all happen on Google’s surface, the retailer is the seller of record for a decision that was shaped entirely before the shopper arrived. The transaction is yours. The influence over the transaction is not.
What Retailers Should Do About It
Join, But Keep a Direct Relationship Google Cannot Intermediate
The answer is not to boycott Universal Cart. The traffic is too real and the holiday timing too urgent. The answer is to join while deliberately investing in the one thing Universal Cart cannot take: a direct relationship with the customer that gives them a reason to come to you rather than to Google. A loyalty program that is genuinely valuable. A post-purchase experience worth returning for. Product and service the customer specifically seeks out by name. The retailers who treat Universal Cart as one channel among several, while building direct relationships that survive outside it, keep their options open. The ones who let Google become the entire front end of their business do not.
Own the Data You Still Can
When a sale comes through Universal Cart, the retailer still sees the transaction because they are the seller of record. That first-party purchase data is an asset, and the retailer should capture and use every bit of it they are entitled to. As I described in the Sephora AI commerce analysis, the retailers who win in AI-mediated commerce are the ones who keep their loyalty and customer data working for them even as discovery moves to third-party surfaces. The transaction data from a Universal Cart sale, connected back to a retailer’s own loyalty profile, is how a retailer turns a Google-originated sale into a customer relationship they actually own.
What This Means for LatAm Retailers
Universal Cart launched in the United States only, but the model is coming to LatAm, directly through Google or through the regional platforms that will build their own versions. Rappi, Mercado Libre, and the social commerce surfaces already occupy the discovery-and-cart position in LatAm markets that Universal Cart is claiming in the U.S. The strategic lesson transfers exactly. The platform that owns discovery and the cart owns the customer relationship, and the retailer who routes everything through it becomes a fulfillment endpoint.
The LatAm retailer has a window to learn from the U.S. launch before the same model arrives at full scale in the region. Build the direct customer relationship now, through loyalty, through a genuinely useful owned channel, and through the WhatsApp and app relationships that are already strong in LatAm retail. The retailer who enters the platform-cart era with a direct relationship already established negotiates from strength. The one who arrives having already ceded discovery to the platform negotiates from dependence.
The Question Every Retailer Should Answer Before Joining
Are You Joining a Channel or Surrendering the Front End?
The distinction that matters is whether a retailer treats Universal Cart as one channel in a diversified strategy or as the front end of their business. A channel is something you participate in while maintaining other paths to the customer. A front end is something you depend on. The retailers who join Universal Cart as one of several ways customers reach them, while investing hard in the direct relationships that do not run through Google, are using the channel. The retailers who let it become the primary way customers discover and assemble their purchases are surrendering the front end, one convenient cart at a time.
The Cart Is Convenient. Convenience Is How Intermediation Wins.
Google Universal Cart is a genuinely good product for shoppers, and that is exactly why retailers should think carefully about it. Intermediation never wins by being worse. It wins by being more convenient, and Universal Cart is more convenient. The checkout still ends with the retailer, and that reassurance is real. But the discovery, the comparison, the cart, and the relationship now live on Google’s surface. The retailers who join with their eyes open, capturing the traffic while fighting to keep a direct customer relationship Google cannot intermediate, will be fine. The ones who join because it is easy and let Google become their storefront will discover that being the seller of record is not the same as owning the customer. The cart is convenient. The question is who the customer belongs to once the convenience becomes the habit.
Adriana Rivas is a retail technology executive and AI strategist. She is a recipient of the Gold Stevie® Award, Thought Leader of the Year 2026, and a Thinkers360 Top Voice 2026 for North America, recognized by and named to the RTIH Top 100 Retail Technology Influencers 2026. She is the author of How to Implement Self-Service Without Failing: From Store Automation to Store Intelligence, now available.