Forget traffic volume for a minute. This is the plumbing comparison: how a merchant actually plugs in, who the payment rail is, who stays merchant-of-record, what catalog you need to supply, and which platform fits Shopify, WooCommerce, or a custom stack. A decision guide for cross-border DTC sellers enabling agentic checkout.
Don't let the hype fool you. 2026 research shows organic LLM traffic is still under 0.2% of all e-commerce sessions, and ChatGPT is over 90% of it. This compares the four big channels on real conversion data — volume, conversion, cost to participate, checkout model — so you know how much to invest and what not to defund.
Microsoft launched Copilot Checkout on Copilot.com in January 2026, with Q1-Q2 rollout to Bing, MSN, and Edge. Shopify merchants are auto-enrolled through the Shopify Market integration, but feed hygiene and Edge behavioral signals decide whether Copilot actually surfaces your SKUs. Here is the operator checklist.