The intersection of design and engineering

Diffuse is a digital agency based in Amsterdam that operates in the space between traditional design and high-end engineering. Founded by Lowie Teunissen, the company markets itself through a philosophy of "Creative Development." This approach is defined by building web products that prioritize performance and impact without sacrificing the aesthetic polish usually associated with creative boutiques. They manage a small team, maintaining a focus on high-touch projects rather than high-volume, low-quality output.

Historically, agencies in this category relied on monolithic platforms like WordPress to deliver client sites. Diffuse has moved away from this model, favoring a modern stack that includes Next.js, Payload CMS, and Shopify with custom themes. This shift is significant because it allows for more flexible data structures and better performance—prerequisites for modern applications that need to integrate external APIs and intelligent services. By specializing in headless architectures, they provide clients with a backend that can feed data not just to a website, but to multiple surfaces including mobile apps and agentic workflows.

Implementation of AI-driven surfaces

The company is explicitly moving into the AI sector through projects like "Site voor de Zaak." While many agencies are still experimenting with AI as a productivity tool for internal use, Diffuse is treating AI as a core component of the products they build for clients. Their inclusion of "AI" alongside "Next.js" in their portfolio highlights a transition from building static marketing pages to interactive applications. These implementations often involve using generative AI to handle content creation, customer interaction, or data processing within the client’s web infrastructure.

This move suggests a strategy of productization. By building "Site voor de Zaak," they are likely creating a repeatable framework for small businesses to deploy AI-integrated websites. This allows them to scale their expertise beyond one-off bespoke projects. Their work with headless systems like Payload CMS further supports this, as these systems allow AI agents to programmatically read from and write to the content repository, making the website a living part of a company’s operational stack rather than a static brochure.

Competitive market position

In the competitive Amsterdam agency market, Diffuse sits as a technical specialist. They are a logical choice for companies that have outgrown basic web builders and need custom logic or high-performance e-commerce setups. Their client list, which includes names like Rapsody Yachts and Cinéart, shows a range of industries from luxury goods to video on demand. Their expertise in video delivery and Shopify customization makes them a niche player for media-heavy brands. As the demand for AI agents grows, Diffuse is positioned as the implementation layer—the team that builds the visible, interactive web interfaces where these agents encounter their human users.