In 2020, Ms. Dhinakaran competed in the reality television show “The Amazing Race” with her brother. They finished fifth.

“I’m passionate about making A.I. successful, fair and transparent,” she wrote in a biography for the show. She added that she was a foodie who enjoyed trying new cuisines, with other favorite hobbies including tennis and “hosting board game nights that involve lying.”

On LinkedIn, Mr. Ngo is listed as a founder of the OneOneThree Project, which was described as a research provider for autonomous vehicle networks, from June 2020 to July 2021. During that time, he worked as a data scientist at the software company Point Predictive and the tax consulting firm Alliantgroup, according to his LinkedIn profile. He joined Arize AI in January 2022.

Mr. Ngo registered a business called OneOneThree in Delaware in April 2021, a year before the Arthur AI meeting and eight months before he started working at Arize AI, according to corporate filings. OneOneThree had no website at the time of the meeting and lists two former employees, including Mr. Ngo, on LinkedIn. OneOneThree’s registration has not been active since March, according to a filing and a representative for the Delaware secretary of state.

OneOneThree has also appeared in a customer contact list for WhyLabs, another A.I. start-up that competes with Arize, indicating that OneOneThree signed up for a demonstration or attended an event hosted by WhyLabs, the person with knowledge of the situation said. On the call with Arthur AI, Mr. Ngo, appearing as Mr. Fung, said that OneOneThree had looked at WhyLabs’s software and liked some aspects of it, but that “it didn’t go deep enough for me.”