The Doordash acquisition of Instacart increases competition. You are missing something fundamental if you think "2 services becoming one means less competition."

Doordash attempted to buy Instacart in 2021 for $40-50B dollars. Since then Instacart has lost market share and value, and Doordash is now acquiring them for $17B.

The real competitors to Doordash and Instacart for grocery delivery are not each other. The competitors are Walmart, Amazon, and local grocery chains (Meijer, Kroger, etc). And guess what? These competitors are winning. Amazon, Walmart, and Kroger alone comprise a majority of grocery delivery (~64% in 2025, per an emarketer FAQ on digital groceries).

It doesn’t seem like they have monopoly here given how big Uber Eats is?