In 2007, Assaf Rappaport, then a 24-year-old officer in Unit 81—an elite Israeli Defense Forces division specializing in hardware and surveillance—kept hearing from a friend about a remarkable 19-year-old soldier named Yevgeny Dibrov. The friend insisted Rappaport had to meet him. "He kept telling me, this guy is being wasted there, you need to talk to him," Rappaport recalled. Before they ever spoke, Rappaport learned that Dibrov had once placed second in a regional round of Chidon Tanach, Israel's national Bible trivia championship, a contest that demands memorizing scripture. Dibrov, who wasn't religious, entered purely to win. "I said, oh my God, this guy can probably do everything," Rappaport thought. When they finally talked on the phone, Rappaport immediately wanted Dibrov in his unit. Soon after, Dibrov joined Rappaport's command. The two would debate business and technology while reading TheMarker, Israel's equivalent of the Wall Street Journal. That connection would prove pivotal two decades later.

Fast forward to April 2026, when ServiceNow paid $7.75 billion in cash for Dibrov's company, Armis—a platform that monitors every connected device on an enterprise network, from medical equipment to industrial IoT, flagging security risks. It was the largest acquisition in ServiceNow's history and the second-biggest pure startup exit in Israeli tech. (Rappaport holds the top spot with Google's $32 billion acquisition of Wiz in 2025.) Dibrov, 38, and co-founder Nadir Izrael split roughly $930 million. Dibrov became general manager of the Armis unit within ServiceNow, while Izrael became group vice president of product and engineering. The duo now run essentially the same operation they built a decade ago, now backed by a company with a $180 billion market cap.

The timing of the deal was critical. When news leaked in December 2025, ServiceNow's stock opened down 9%. The market was gripped by a new fear: AI agents would render traditional enterprise software obsolete. By spring 2026, Wall Street had coined the term "SaaSpocalypse." ServiceNow's shares fell as much as 42% in the first four months of 2026. But Amit Zavery, ServiceNow's chief product officer, dismissed the doomsday narrative. "We did not really believe in this SaaS apocalypse," he said, noting the company consistently hit its financial targets. Instead, the acquisition was a strategic move to combine cybersecurity, IT asset management, and industrial monitoring into one platform. "That's where our thinking was," Zavery explained. By May, ServiceNow shares surged 41%, and by July they jumped another 8% after strong earnings. Revenue hit $3.99 billion, up 24%, and AI products crossed $1 billion in annual contract value.

The story of Armis began long before the acquisition. Dibrov, who immigrated from Ukraine as a child, grew up in a household that couldn't afford a car. That memory fueled his drive. He studied electrical engineering and computer science at Technion. In 2012, Rappaport called him to join a new cybersecurity startup, Adallom, which Microsoft bought for $250 million in 2015. When Dibrov left Microsoft to start Armis, he asked Rappaport to be his first investor. Rappaport wrote a $100,000 check, and later, when Rappaport co-founded Wiz, Dibrov returned the favor. The two effectively financed each other's fortunes.

Armis grew steadily, reaching over $300 million in annual recurring revenue. By August 2025, Dibrov was telling employees the company was heading toward an IPO. Then came an unexpected call from ServiceNow's Amit Zavery, who had been tracking Armis for years. ServiceNow had been building its own asset-tracking tools but decided buying the market leader made more sense. "As AI becomes prevalent, the biggest problem customers face is security and governance," Zavery said. John Aisen, ServiceNow's senior vice president of product management for security, recalled being sold on Armis when he discovered a sophisticated product called Vipr that wasn't even listed on Armis's website. "That took me over the edge," he said.

Dibrov's relentless work ethic is legendary. During a 24-hour period with Fortune, he consumed five espresso shots, dashed across Manhattan, and attended his co-founder's wedding via Zoom from a car. He once closed a funding round from the hospital the day after his daughter was born. Derek Zanutto, a partner at CapitalG, said, "He's an unstoppable energizer bunny. I've never seen him well rested." Yet Dibrov now navigates a larger bureaucracy. "I still act like a startup," he said. "If there's any roadblock, I go immediately to Amit and Bill." The acquisition hasn't slowed him down; it has only expanded his reach. Zavery noted that the deal is already paying off. "It's been only four or five months, but I think all signs point that we made the right decision."