Google launched the competing Universal Commerce Protocol (UCP) on January 11, 2026, at the National Retail Federation conference, positioning it as the more robust alternative. Developed with Shopify, Etsy, Wayfair, Target, and Walmart, the UCP powers shopping across discovery, checkout, cart management, and post-purchase workflows within Google AI Mode, Search, and the Gemini app. By April 2026, major retailers including Gap, Ulta Beauty, and Gymshark had live checkouts on Google's platform, with real-time pricing functionality already operational. Microsoft has also entered the space with Copilot Checkout, supporting merchants like Keen and Pura Vida.
The stakes are substantial. Shopify reported an 11-fold increase in AI-attributed orders between January 2025 and January 2026, while analysts project the AI commerce market could reach $1–5 trillion by 2030. Google's advantage lies in its 20-year Shopping Graph database of 50 billion listings and its Personal Intelligence feature, which provides access to user history via Gmail and Photos. The protocol interoperability question—whether ACP and UCP can coexist—remains unresolved, but executives suggest a market tipping point is months away. The winner will effectively control retail's digital shelf space as autonomous AI shopping becomes mainstream.