Long before William “Will” Cielen began designing advanced cybersecurity infrastructure to protect corporate data, his primary stage was quite literally traveling across the globe. As the son of a professional magician and an acrobat, Cielen spent the earliest years of his life living on a cruise ship, followed by a subsequent chapter living in Las Vegas. When he was 10 years old, his family relocated to Montreal, where he embarked on an intensive professional ballet program that required him to split his days between rigorous morning dance training and afternoon academic studies.
Reflecting on those formative years, Cielen notes that his unique upbringing completely transformed his personal demeanor. Although he describes himself as having been a rather introverted child, the constant exposure to performance environments and unconventional living arrangements gradually shaped him into an extrovert. That unconventional trajectory, marked by discipline, performance under pressure, and rapid adaptation, ultimately laid the groundwork for an exceptionally accelerated career in technology and entrepreneurship.
By the age of 15, Cielen had already skipped two grades, enrolled in college, and established his own website design and development business. His journey toward venture-backed entrepreneurship accelerated dramatically during a trip to a hackathon in Waterloo, Ontario, where he crossed paths with venture capital investors. In a whirlwind week that altered the course of his professional life, Cielen made the bold decision to drop out of school, walk away from an algorithmic trading internship, and board a flight to San Francisco to co-found Hilt.
Now, Hilt is officially emerging from stealth mode and announcing that it has successfully raised $4.2 million in a seed funding round. The fresh capital is designed to fuel the startup’s mission of helping enterprise companies detect, isolate, and halt unusual data activity—including the covert theft of sensitive information—in real time. Array Ventures spearheaded the seed investment round, with participation from a diverse group of institutional backers and prominent funds including Verdict Capital, Base10 Partners, Brickyard, Liquid 2 Ventures, Sequel, the Sarah Smith Fund, and Alumni Ventures. This latest influx of capital brings Hilt’s total institutional funding to $4.7 million, following an initial $500,000 pre-seed round led by Pear VC in October 2025.
Finding the Problem
When Cielen arrived in San Francisco to establish Hilt alongside his co-founders, he knew he wanted to tackle the sprawling and critical sector of cybersecurity, but he had not yet locked onto the exact market pain point he wanted to solve. His background prior to the move included attending Concordia University in Montreal and gaining hands-on financial technology experience as an algorithmic trading intern at the National Bank of Canada. Rather than rushing blindly to write code, Cielen understood the necessity of deep market research.
"I had to do a lot of customer discovery," Cielen said, detailing his extensive efforts to engage with prospective enterprise clients, understand their operational bottlenecks, and ensure the startup was not simply building products in the dark without market validation.
The turning point arrived in January, during a pivotal 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 microsecond intervals, there is virtually zero margin for error and zero tolerance for traditional security software that introduces latency or slows down system performance.
Recognizing the magnitude of the challenge, the hedge fund offered Hilt a lucrative potential enterprise contract valued between $1 million and $2 million if the startup could successfully engineer a solution. To demonstrate their commitment, the prospective client paid a six-figure sum upfront before Hilt had even built the underlying software architecture.
Hilt’s proprietary technology operates by continuously monitoring how data moves across complex cloud infrastructure, local computers, and enterprise networks. By establishing continuous behavioral baselines for individual users and system resources, the software is engineered to flag anomalous activity instantly—even when the user performing the action possesses legitimate administrative or access permissions. Crucially, the company claims its software accomplishes this deep level of visibility without imposing performance delays on the host system.
As an illustrative example, Cielen points to standard login behavior. While a late-night login might be entirely normal for an employee who frequently works unorthodox hours, a different pattern emerges if an individual who strictly works standard daytime shifts suddenly logs in at midnight immediately after executing a password change. Hilt’s system is designed to catch this specific combination of risk factors as suspicious behavior.
When an anomaly is detected, Hilt can immediately alert internal security teams to investigate the incident or, in advanced scenarios, automatically quarantine the activity while it is actively occurring.
"They don’t have to wake up and see that it happens, but we can actually stop it as it happens," Cielen explained, emphasizing the shift from reactive forensics to proactive intervention.
The technological foundation of Hilt relies on operating at the kernel level—the fundamental core of an operating system—and streaming high-volume activity data directly into graph neural networks, a specialized category of artificial intelligence models trained to spot behavioral anomalies. Cielen notes that this foundational approach grants Hilt visibility beneath the various software applications utilized by customers, enabling seamless deployment across diverse computing environments. Furthermore, performance benchmarks conducted by at least one early customer indicated that integrating Hilt into their cloud systems actually improved overall operational speed.
Building on its initial validation, the startup continues its close collaboration with the founding hedge fund client and has successfully onboarded an additional high-frequency trading firm. Cielen notes that Hilt’s active customer count doubled within the single month following their transition to a more aggressive marketing strategy, though the company has opted not to disclose its total customer figures at this stage.
Hiring and Expanding Beyond Finance
While initial traction was forged within the high-frequency trading and financial sectors, Hilt is experiencing a surge in inbound interest from neobanks, healthcare organizations, professional services firms, and other enterprises that routinely handle sensitive, high-value data. The startup’s deployment model requires customers to run the product securely within their own internal infrastructure, ensuring that sensitive corporate data never leaves the client’s direct control. Monetization is structured around an annual subscription fee calculated per data collector deployed within the enterprise environment.
The startup currently operates with a lean, highly focused team of 11 employees. Alongside Cielen, the leadership team includes co-founder and Chief Technology Officer Alex Genest and founding engineer Zin Bitar. Although the company was originally founded in San Francisco, the entire team relocated to Chattanooga, Tennessee, in collaboration with early investor Brickyard as part of their concentrated push toward achieving optimal product-market fit.
Looking ahead, Cielen indicated that the newly secured seed capital will be deployed primarily toward strategic hiring and expanding the company’s market footprint.
"The money is very useful for hiring the best people," he said.
Investor POV
Industry investors backing Hilt have expressed strong conviction in both the founding team and the technical architecture of the platform. Shruti Gandhi, a general partner at Array Ventures, highlighted the limitations of legacy security solutions currently dominating the market, noting that most existing tools tend to fall into two problematic categories.
"Most tools in this space do one of two things—either they predict what’s sensitive upfront and get it wrong a lot, or they tell you what happened after the data is gone," Gandhi wrote via email.
She emphasized that Hilt bridges this critical operational gap by offering real-time threat detection and mitigation. "Hilt can find and stop these breaches in real time, with accuracy. 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 pointed out that modern cybersecurity breaches increasingly diverge from traditional hacking tropes, frequently masquerading as entirely legitimate operational workflows.
"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 noted. "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 decision to invest in Hilt was driven in large part by the exceptional characteristics of its young founder.
"At Verdict Capital, we back founders who are obsessed, have high velocity and are learning animals," Bonatsos wrote via email. "Will exemplifies these traits."
Bonatsos, a former investor at General Catalyst who established Verdict Capital in early 2026 and previously backed companies such as Mercor, added that Hilt’s deep-kernel approach represented one of the most compelling technical strategies his team had evaluated, making Hilt one of the earliest checks written by the 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."
