Long before William “Will” Cielen began designing advanced cybersecurity software to protect enterprise networks from sophisticated data theft, his early education took place under the bright lights and theatrical atmosphere of his father’s magic shows.
The son of a professional magician and an acrobat, Cielen spent the formative first five years of his life living dynamically on a cruise ship before transitioning to five years of land-based life in Las Vegas. At the age of 10, his family relocated to Montreal, where he embarked on an intensive, rigorous classical ballet program. The schedule required him to spend his mornings dedicated entirely to dance and his afternoons catching up on standard schoolwork.
"I was rather introverted as a child, but I became extroverted through the unique upbringing," Cielen recalls, reflecting on an unconventional childhood that fostered adaptability and performance composure.
That youthful pace of acceleration did not slow down as he entered his teens. By the age of 15, Cielen had skipped two grades, formally entered college, and launched his own independent website design and development business. A subsequent trip to attend a hackathon in Waterloo served as a major turning point, introducing him to venture capital investors for the first time. Seizing the momentum, he dropped out of school that very same week, walked away from an algorithmic trading internship at the National Bank of Canada, and boarded a flight to San Francisco to co-found Hilt.
Now, after operating quietly in development, the startup is officially emerging from stealth mode. Hilt announced exclusively to Crunchbase News that it has successfully raised $4.2 million in a seed funding round aimed at scaling its technology to help modern enterprises detect and instantly halt unusual data activity, including the theft of sensitive proprietary information.
The seed financing round was led by Array Ventures, with participation from Verdict Capital, Base10 Partners, Brickyard, Liquid 2 Ventures, Sequel, the Sarah Smith Fund, and Alumni Ventures. This new capital injection brings Hilt’s total institutional funding to $4.7 million, following an earlier $500,000 pre-seed round led by Pear VC in October 2025.
Finding the Core Problem
When Cielen, now serving as Hilt’s co-founder and CEO, first touched down in San Francisco, he knew he wanted to build a venture in the cybersecurity sector, but the precise problem to tackle remained undefined. Drawing on his academic background at Concordia University in Montreal and his practical financial experience as an algorithmic trading intern, he understood that building technology without deep market validation was a recipe for failure.
"I had to do a lot of customer discovery," Cielen said, describing his early months of pounding the pavement, talking extensively to potential enterprise buyers, and conducting market research to pinpoint genuine operational pain points rather than building in the dark.
A pivotal breakthrough arrived in January, during a critical conversation with the chief technology officer of a major hedge fund. The executive outlined a severe and persistent security vulnerability inherent in high-frequency trading operations. Because high-frequency trading systems execute transactions in microseconds, there is practically zero tolerance for traditional security software that introduces latency or slows down system performance.
The stakes were remarkably high. The hedge fund dangled a potential commercial contract valued between $1 million and $2 million if Hilt could engineer a solution capable of protecting their ultra-low-latency environment. To demonstrate serious intent, the prospective client paid Hilt a six-figure sum upfront before the software had even been built.
Hilt’s resulting platform operates by monitoring how data traverses complex cloud infrastructure, individual computers, and enterprise networks. By continuously building behavioral baselines for both users and system resources, the software flags anomalous activity instantly—even when the user possesses valid, authorized credentials to perform the action—all while claiming to operate without introducing system drag.
To illustrate, a late-night login might ordinarily be considered completely normal for a software engineer who frequently logs extra hours. However, if an employee who strictly works standard daytime hours suddenly initiates a login at midnight—compounded by the fact that they have just changed their password—Hilt flags the unusual combination of behaviors as suspicious.
The platform is engineered to instantly alert internal security teams to investigate or, in pre-configured scenarios, automatically quarantine the suspicious activity in real time.
"They don’t have to wake up and see that it happens, but we can actually stop it as it happens," Cielen explained.
The technical architecture behind Hilt involves operating directly at the kernel level—the core foundation of an operating system—and streaming high-volume activity data into graph neural networks, a specialized category of artificial intelligence models designed to identify complex structural anomalies. Cielen noted that this architectural placement grants Hilt deep visibility beneath the various software applications utilized by customers, enabling seamless deployment across diverse computing environments.
Internal measurements from one customer even indicated that deploying Hilt’s deep kernel-level monitoring actually optimized and sped up their underlying cloud systems. Hilt continues to maintain its partnership with the initial hedge fund while adding another prominent high-frequency trading firm to its client roster. Cielen noted that the startup’s overall customer count doubled in the month following a more aggressive marketing and outreach push, though he declined to disclose absolute figures.
Hiring and Expanding Beyond Finance
While initial adoption has been heavily concentrated within high-frequency trading and financial institutions, Hilt is experiencing a surge of inbound interest from neobanks, healthcare organizations, professional services firms, and other corporate entities that handle sensitive data repositories. Operating on a model where customers run the software entirely within their own infrastructure to retain absolute data sovereignty, Hilt charges an annual fee determined by the number of data collectors deployed.
The startup currently employs a lean team of 11 people, anchored by co-founder and Chief Technology Officer Alex Genest and founding engineer Zin Bitar. Although the company was originally established in San Francisco, the entire team relocated to Chattanooga, Tennessee, to work closely with investor Brickyard as they refine their product-market fit. Cielen emphasized that the newly secured seed capital will be deployed primarily toward strategic hiring and expanding market presence.
"The money is very useful for hiring the best people," Cielen said.
The Investor Perspective
Venture capital backers point to Hilt’s unique architectural approach and real-time intervention capabilities as the primary drivers behind their investment decisions.
Shruti Gandhi, general partner at Array Ventures, observed that most traditional cybersecurity tools generally fall into one of two flawed categories: they attempt to predict what data is sensitive upfront and frequently misclassify it, or they function purely as forensics tools that explain what happened after the data has already been exfiltrated.
"Hilt can find and stop these breaches in real time, with accuracy," Gandhi wrote in an email. "It also runs entirely inside the customer’s own environment, so nothing leaves the company. For a bank or government entity, that is the difference between proactive vs. reactive response."
Gandhi also highlighted the shifting nature of modern security breaches, noting that contemporary cyberattacks rarely resemble traditional brute-force intrusions.
"They look like normal activity such as an employee using valid access, a connected vendor, or an AI agent doing what it’s allowed to do," she said. "Hilt connects these actions and detects when normal behavior becomes suspicious. As AI agents increasingly interact and act autonomously, we think this problem will only grow, and we wanted to get ahead of it."
Niko Bonatsos, founder and managing director of Verdict Capital, noted that his firm’s decision to invest was catalyzed heavily by the drive and character of the CEO.
"At Verdict Capital, we back founders who are obsessed, have high velocity and are learning animals," Bonatsos wrote. "Will exemplifies these traits."
Bonatsos, a former investor at General Catalyst who founded Verdict early last year, added that Hilt’s deep technical differentiation immediately stood out during evaluation, making it one of the very first checks written by his new fund.
"Most security tools look at content: files, signatures, known threats. Hilt looks at how data moves, at the kernel, which is the one place you can’t hide from," Bonatsos said. "Everyone assumed you couldn’t sit that deep without slowing systems down. They did it in live financial environments… Selling security into banks is about as hard as enterprise sales gets, and I watched them do it."
