Pre-close competition between Instacart and DoorDash

This waiting period turns the deal into a live competitive test, not a handoff. Until closing, Instacart still has to keep grocers, advertisers, shoppers, and workers loyal while DoorDash is still free to win the same retailer contracts and grocery orders. That matters because Instacart’s edge is not owned inventory or stores, it is retailer software, marketplace demand, and ad dollars tied to those grocery relationships.1 2 3 4

• The merger terms require separate operation until close, and the expected timeline runs to late 2027 or the first half of 2028. That creates a long period where retailer partners can keep benchmarking Instacart’s storefront, fulfillment, and ad products against DoorDash’s competing grocery offer before any integration benefit shows up.1 2 3
• Instacart’s business is especially exposed to independent competition because it built online grocery by plugging into existing grocers rather than owning supply. In prior research, Instacart had about 29% online grocery share in 2022, while DoorDash and Uber had reached about 5% each after entering grocery in 2020, showing that adjacent delivery networks can move into the category quickly.4 5
• The real battleground is retailer economics. Instacart historically helped grocers fight Amazon by providing demand and software in exchange for take rate, and its higher margin ad business sits on top of that traffic. If retailers see better economics or fewer restrictions elsewhere during the waiting period, they gain leverage before the combined company can negotiate as one.4 5

Going forward, the pre close period will decide how much strategic value is still intact when the merger actually finishes. If Instacart keeps retailers engaged and proves its software and advertising stack can hold share on its own, DoorDash closes with a stronger grocery platform and more bargaining power across local commerce.1 2 4