Several startups have been racing to sell software known as one-click checkout to retailers such as The Honest Company and Forever 21 to speed up how their customers pay for products online. But Fast, the only startup in the field backed by payments provider Stripe, has been slow to grow its business and is far behind rivals.

The San Francisco–based Fast, which launched its one-click service in 2020, tried to win by signing up small merchants. Its main startup rival, Bolt, launched its service in 2018 with a different strategy: landing large customers including Lucky Jeans and Nautica. The startups’ financial results have diverged: Last year, Fast generated around $600,000 in revenue, three people with knowledge of the numbers said, while The Information previously reported that Bolt generated roughly 50 times that figure. And when Fast late last year tried to raise a $100 million Series C financing at a valuation north of $1 billion, it didn’t find any takers at the time, a person with direct knowledge of the matter said.