Two companies racing to develop electric aircraft are teaming up.

Eve Air Mobility, which was founded by the Brazilian airplane manufacturer Embraer, said on Tuesday that it planned to outfit its battery-powered planes under development with electric pusher motors made by Beta Technologies, a Vermont start-up. The motors drive a propeller in the rear of the aircraft.

The deal gives Beta another source of revenue as it works on its own electric aircraft. Beta previously struck deals to supply technology to other companies. Beta and Eve hope to have their first aircraft certified in or by 2027.

“It’s a huge deal for us,” Kyle Clark, Beta’s founder and chief executive, said in an interview. Beta estimates that the deal could be worth up to $1 billion over 10 years. About two-thirds of that amount would come from selling the motors and the other third from servicing them, Mr. Clark said.

Beta conducted an initial public offering last month and is valued at more than $6 billion. Several Wall Street analysts have expressed optimism about its prospects in part because of its plans to both manufacture aircraft and supply parts.

“Beta’s premier partners and its role as a supplier for other industry peers underscore its leading role,” Morgan Stanley analysts said in a research note on Monday, comparing the company to a “young Tesla.” Beta will issue quarterly financial results on Thursday.

The company, based in South Burlington, Vt., is working on developing a small electric aircraft that takes off and lands like a normal airplane. Beta plans to sell that aircraft to businesses that specialize in cargo and emergency medical services, though the plane can also be outfitted to carry passengers. The company is also working on an aircraft that can take off and land vertically, like a helicopter, but cruise like a plane.

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