DoorDash said that it is open to working with third-party agent makers.

The companies say the tie-up would combine DoorDash's global reach and expertise in logistics with Instacart's purpose-built technology and long relationships with grocers.

The acquisition would bring two major players in on-demand delivery under one roof, combining DoorDash’s dominance in restaurant takeout with Instacart’s reach in grocery delivery.

Instacart might sell itself to a larger competitor.