From black box to full control with Leukeleu

Deploying sovereign AI with SureGPT and NVIDIA-powered NeoCloud

In an era where data is the new currency, Leukeleu and Nebul redefine AI implementation by prioritizing digital sovereignty. This case study explores how the integration of NVIDIA-powered NeoCloud infrastructure and the SureGPT platform enables organizations to leverage cutting-edge Large Language Models (LLMs) while maintaining 100% control over their intellectual property. Discover how we transformed the Black Box of AI into a transparent, secure, and high-performance asset.

“Our partnership with Leukeleu is a great example of how synergy can be created — completely European innovation, tailored to European enterprises.”

Dion Bonné, CRO Nebul

Limitations of Public Clouds

Leukeleu identified several significant friction points when working with US- based hyperscalers such as Amazon Web Services and Microsoft Azure. While these platforms offer scale and maturity, they also introduced constraints that became increasingly difficult to ignore. Data concerns Data quickly surfaced as a primary issue. There was often limited clarity around where data physically resided, how it was governed, and whether it could be used to train broader models. For clients operating in sensitive industries, this lack of transparency created hesitation and raised legitimate compliance and sovereignty questions. Lack of flexibility Flexibility proved to be another recurring challenge. Large technology providers tend to encourage adoption of their proprietary ecosystems. While powerful, these environments can limit developer control and architectural freedom. Solutions are optimized to work best within the provider’s own stack, making independent decision-making more complex over time. Intellectual property risks Protecting intellectual property was particularly critical for Leukeleu’s clients. Many organizations handle highly sensitive corporate intelligence and proprietary data, from internal strategies and financial models to client records and trade secrets. The possibility — real or perceived — of that information leaking into public models or being used to train third-party systems was a deal- breaker.

Implementation & Workflow

Many organizations handle highly sensitive corporate intelligence and proprietary data. The possibility—real or perceived—of that information leaking into public models was a deal-breaker. Protecting IP was non- negotiable. Vendor lock-in Finally, vendor lock-in remained a structural concern. Dennis Bunskoek, owner of Leukeleu and a seasoned software developer, has seen this dynamic firsthand. Hyperscalers often draw companies into tightly integrated “walled gardens.” The deeper you go, the harder it becomes to leave. Migrating away doesn’t simply mean switching providers—it can require rewriting large parts of the architecture. Nebul’s open, API-compatible approach offered a rare alternative: powerful infrastructure without forced dependency. It provided the performance and scalability Leukeleu needed, while preserving the flexibility to switch, adapt, or evolve without being locked into a single ecosystem. Nebul’s open, API- compatible approach offered a rare alternative: powerful infrastructure without forced dependency. The collaboration between Leukeleu and Nebul is defined by close communication and tight technical alignment, enabling fast execution without complexity. Seamless stack integration Leukeleu’s Python and Django applications run smoothly on Nebul’s infrastructure, supporting scalable AI workloads without architectural friction. The SureGPT synergy SureGPT is Leukeleu’s private AI solution built on Nebul’s sovereign NVIDIA-powered NeoCloud infrastructure, ensuring data never leaves the client’s control. The collaboration is built on complementary strengths. Nebul delivers high-performance GPU infrastructure, while Leukeleu provides the intelligence layer—UI, data preparation, and smart integration. Each solution is carefully aligned with client workflows, compliance requirements, and business goals. The Nebul environment enabled rapid iteration of Mistral-based models alongside existing tools. Ecosystem impact The ecosystem effect is already tangible. A major Leukeleu client with strict IP requirements was introduced to Nebul and has since become a direct customer. The collaboration is built on complementary strengths. Nebul delivers high-performance GPU infrastructure, while Leukeleu provides the intelligence layer— UI, data preparation, and smart integration.

Beyond Hyperscalers

How Leukeleu and Nebul built SureGPT to solve the data privacy paradox?

The Challenge: Leukeleu, a sustainable software development agency, faced a critical roadblock: clients wanted to leverage AI, but “Big Tech” hyperscalers presented unacceptable risks regarding Intellectual Property (IP) and data privacy.

The Solution: By partnering with Nebul, Leukeleu gained access to a sovereign NVIDIA- powered NeoCloud infrastructure. This allowed them to build SureGPT ensuring clients retain complete control over their data and IP.

The Outcome: The partnership transformed Leukeleu from a traditional web agency into an AI-ready powerhouse, capable of delivering complex, high-performance Python/ Django applications without compromising on European data standards.

“Nebul provides the infrastructure, we ensure it delivers value. This keeps AI reliable, manageable, and usable.”

 

Dennis Bunskoek, Co-owner Leukeleu

Results

100% Client trust: Eliminating black box fears and deploying AI with confidence via SureGPT.

10x Performance gains: Significant improvements in latency and reliability for data- heavy Django applications.

100% Tailored: Delivering tailored AI solutions that unlock value from business context and IP.

About Leukeleu

Based in Utrecht, Leukeleu is a software development agency of 20 specialists with nearly two decades of experience building high-quality, sustainable digital products. Their philosophy, “AI with a Purpose,” is rooted in a simple but firm conviction: technology should serve long-term business goals, not hype cycles. That conviction has been tested in some of the most demanding environments imaginable. Nearly 15 years ago, Leukeleu built a fully sovereign e-health platform for Dutch mental healthcare organizations, entirely without American or non-European infrastructure. At a time when the industry was barely thinking about data residency, Leukeleu was already building for it. That platform eventually grew to serve over 70 healthcare organizations and 60,000 patients across the Netherlands. Today, sectors where data sensitivity, regulatory compliance, and trust are not optional, remain core markets for Leukeleu. “AI with a Purpose,” is rooted in a simple but firm conviction: technology should serve long-term business goals, not hype cycles.