Visa Inc., facing a prolonged antitrust fight with the U.S. Justice Department, walked away from a proposed $5.3 billion acquisition of Plaid Inc. aimed at expanding the card network’s services.

The department sued to block the deal in November, accusing Visa of trying to buy the financial-technology firm to eliminate an emerging threat to its online debit business. Visa has said the government failed to provide “a shred of detail” about how Plaid’s products would ultimately compete with the payments behemoth.

“It really became quite clear in recent weeks that the Department of Justice is not inclined to work with Visa and Plaid to bring this process to a timely and reasonable conclusion,” Visa Chief Executive Officer Al Kelly told analysts on a conference call Tuesday. “Therefore, we decided not to devote more time to this acquisition.”

The government called the companies’ decision to halt their combination “a victory for American consumers and small businesses.” President-elect Joe Biden’s Justice Department would’ve been responsible for seeing through the case at a trial set for June.

“American consumers and business owners rely on the internet to buy and sell goods and services, and Visa — which has immense power in online debit in the United States — has extracted billions of dollars from those transactions,” the Justice Department said in a statement. “Now that Visa has abandoned its anticompetitive merger, Plaid and other future fintech innovators are free to develop potential alternatives to Visa’s online debit services.”

“We do not believe this would materially change Visa’s growth trajectory,” Moshe Orenbuch, an analyst at Credit Suisse Group AG, told clients in a note. “They could effectively serve fintechs partnering with Plaid (where it is still an investor), or could acquire a smaller player.”

Banks and startups use Plaid to access consumer financial data. The company now has more than 4,000 customers, including Alphabet Inc.’s Google and Microsoft Corp.

Beyond Visa, Plaid also counts marquee names in finance — including Goldman Sachs Group Inc. and Citigroup Inc. — as investors. Hundreds of banks have joined the platform since Visa announced its takeover, Zach Perret, CEO and co-founder of Plaid, said in a separate blog post.

“The realities of going through a multiyear regulatory review are just not compatible with the fast-moving realities of a startup,” Perret said in an interview. “We’ve really enjoyed getting to know the Visa team and getting to learn from them and I’m eager to find ways to continue to work with them.”

Kelly told analysts his company could partner with Plaid to offer Visa’s services to fintechs.

“We are confident in Zach and the team’s ability to lead Plaid as the digitization of finance continues, and we support the company’s decision to pursue an independent path,” Mary Meeker, a member of Plaid’s board and an investor, said in an emailed statement.

Visa’s debit business has been facing mounting scrutiny from antitrust regulators. The Federal Trade Commission issued a civil investigative demand last year seeking additional documents after the agency’s Bureau of Competition began looking into whether Visa’s actions prohibited merchants’ ability to route certain payments over alternative debit networks.

Visa learned while conducting due diligence on Plaid that the venture planned to create a money-movement business and aimed to offer the service at a 50% discount to Visa’s fees, according to the Justice Department’s court filing in November. Visa earned $4 billion from its debit business in 2019, with roughly half of that coming from its facilitation of online debit payments, the department said.

In its response last month, Visa argued Plaid had no reasonable path to creating a compelling, two-sided payments network, given it has no consumer awareness of its products or merchant adoption.

“The reality is that the debit market is highly competitive and highly complex,” Kelly said on the call. “Our debit business faces intense competition from a variety of players, including ten different debit networks and we face vigorous competition from other forms of payments, including cash, check and credit.”