Uber Technologies Inc. has agreed to purchase Postmates Inc. in an all-stock acquisition worth $2.65 billion planned to be revealed in the United States as soon as Monday morning, according to sources with knowledge of the deal. 

Pierre-Dimitri Gore-Coty, head of Uber Eats, is expected to continue to oversee Uber's integrated delivery operation, a person who requested anonymity disclosed. Postmates chief executive Bastian Lehmann and his team will remain in their positions to run Postmates as a separate operation, another source disclosed.

Reuters reported last week that Postmates had revived plans for a public listing after a dealmaking in the US online food delivery service market, which fuelled interest in the company's acquisitions.

A representative for Uber did not issue any comment on Sunday night, and a spokesperson for Postmates refused to immediately respond to a request for comment. Bloomberg earlier reported the specifics of the agreement.

Postmates is last priced at $2.4 billion in a private fundraising round last September when it secured $225 million. According to analytics firm Second Measure, Postmates, founded in 2011, accounted for 8 percent of the American meal delivery market in May.

Postmates was co-founded by Bastian Lehmann, Sean Plaice, and Sam Street in 2011 and has expanded to include an army of more than half a million members and 600,000 merchants across 50 states.

Uber had intended to buy Grubhub Inc via its Uber Eats service, but withdrew from the transaction when Just Eat Takeaway.com NV eventually struck a $7.3 billion agreement last month to acquire the US online food delivery.

Food delivery apps, which link drivers, customers, and food businesses have grown rapidly in the past few years, sparked by venture capital and contract employees. But the services they provide are not totally distinct from one another, creating stiff rivalry and pressure to keep fees affordable. While more consumers have been taking advantage of delivery services during the health crisis, sales have been quite hard to come by.

As a result, delivery app businesses have circled one another, waiting for the right moment to strike deals to gain an edge. Postmates has previously talked about possible deals with DoorDash, the biggest service in the US, and another competitor - GrubHub - two people with knowledge of the matter, said.

According to the analytics group Second Measure, Postmates was responsible for around 10 percent of food delivery revenues last year, while Uber accounted for 32 percent. UberEats made up 20 percent of revenues.