Artifical Intelligence
From The Forest to The Stratosphere
The AI image-generation model FLUX is recognized as one of the most powerful tools of its kind. That it was built in rural Germany by a scrappy unknown start-up is not unusual: Black Forest Labs is an outstanding example of what AI excellence can look like in the heart of Europe.
Jul 16, 2026
Read this article to find out:
- Why a small German university town became the birthplace of one of the world's most powerful AI image-generation models
- How Black Forest Labs went from start-up to billion-dollar company in record time
- Which global tech giants are already building with FLUX
At first glance, Freiburg im Breisgau seems an unlikely rival to San Francisco, London, or Shenzhen. The idyllic university town in southwest Germany is better known for its medieval old town, its trams, and the forested hills that frame it. Yet Freiburg is home to the headquarters of one of the world's most talked-about companies in generative AI: Black Forest Labs (BFL).
The location might be parochial but CEO Robin Rombach has global ambitions: “We are not like an exotic, southern-German local AI company,” he told fDi Intelligence. “The goal is to produce the best AI tech in the world.”
“I am deeply convinced that you don’t need to only be in a major tech hub to execute and build a company.”
Robin Rombach, CEO Black Forest Labs
The company's valuation is testament to its success: at the close of 2025, BFL was valued at around USD 3.25 billion in its latest funding round, making it one of the rare German start-ups to reach unicorn status – a valuation exceeding USD 1 billion – in record time.
It is no accident that the company chose to root itself in a German university town. “Freiburg is a great place to focus,” said Rombach. “I am deeply convinced that you don't need to only be in a major tech hub to execute and build a company.”
BFL's decision to stay in Germany speaks to a broader trend: the country's understated but formidable appeal as a base for AI innovation.
Black Forest Labs at a glance
- Founded in 2024
- 70 employees
- Locations in Freiburg im Breisgau and San Francisco
- Valuation at the end of 2025: US$3.25 billion
Networked by design
Rombach described the decision to locate in Freiburg in 2024 as “the best thing that we have done so far” to the German newspaper Handelsblatt – and not merely out of hometown loyalty. The German university town, he argues, fosters an environment of openness and intellectual exchange that is hard to replicate elsewhere. “The University of Freiburg actually produced two of the most impactful works that are very related to our technology,” he notes.
That kind of proximity to cutting-edge academic research is not unique to Freiburg. “Start-ups need not only capital but also an ecosystem of experts, research institutions, and talent,” says Asha-Maria Sharma, AI expert at GTAI. “All of this can be found in Freiburg – and in many other German cities with a major university.”
AI with German roots
BFL's founders are themselves products of Germany's academic landscape. Rombach and his co-founder Andreas Blattmann met at German universities, where they began working with generative AI. They later joined the British company Stability AI as researchers, where they co-developed Stable Diffusion – the open-source image model that, alongside ChatGPT, ignited the global wave of interest in generative AI.
In 2024, Rombach and Blattmann founded BFL with several co-founders. Their flagship product, FLUX, is a video and image generation model, that can generate high-resolution, photorealistic images from a few lines of text, selectively modify existing images, and combine multiple templates into new designs. The technology has attracted some of the most recognizable names in global business. Adobe has integrated FLUX into Photoshop. Deutsche Telekom uses BFL's image models for its marketing campaigns. And BFL has entered into a partnership with Mercedes-Benz to develop AI models for the carmaker's marketing operations.
The company's rise is reflected in its financing history. Since its founding, BFL has raised a total of around USD 450 million. A seed round in the double-digit millions was followed by interim financing that the company deliberately kept out of the public eye. “We wanted to concentrate entirely on building the company and further developing the models,” Rombach explained to Handelsblatt.
That changed with the Series B round at the end of 2025, which brought in more than USD 300 million and announced BFL's arrival on the global stage in no uncertain terms. “The interest was huge; the round was significantly oversubscribed,” said Rombach. Investors included US venture capital firm Andreessen Horowitz, international growth funds, and strategic partners such as NVIDIA, Adobe, and Salesforce.
For Adobe, the appeal was clear from the outset. “From our first meeting with Robin Rombach and the founding team, we recognized something rare,” said David Popowitz, Head of Corporate Development and Ventures at Adobe: “Researchers who pioneered Latent Diffusion and Stable Diffusion – technologies that fundamentally transformed generative AI – now building the next frontier of visual intelligence.”
The Founders of Black Forest Labs
Robin Rombach, CEO and Co-Founder
Robin Rombach studied physics at Heidelberg University between 2013 and 2020, before embarking on a PhD in computer science in the university's computer vision group. In 2021, he moved with his research team to LMU Munich, where he and his co-founders, working alongside Professor Björn Ommer, developed Latent Diffusion Models – foundation for Stable Diffusion, one of the most consequential breakthroughs in generative image AI in recent years. Rombach subsequently joined the British AI company Stability AI, taking part of the team with him, before founding Black Forest Labs in Freiburg in 2024. He leads the company today as CEO and is widely regarded as one of the most influential researchers in generative image AI in the world.
Andreas Blattmann, Co-Founder
Andreas Blattmann studied mechanical engineering at the Karlsruhe Institute of Technology and went on to conduct research in generative AI at Heidelberg University, LMU Munich, NVIDIA, and Stability AI, making significant contributions to both image and video generation. He is co-inventor of Latent Diffusion – the modelling technique that underpins the open-source text-to-image system Stable Diffusion. The same technique powers state-of-the-art visual AI models such as Midjourney and DALL·E 3 and has found applications across a wide range of fields, including medical imaging.
Other Co-Founders
Beyond Rombach and Blattmann, Black Forest Labs was founded by a ten-strong team that includes Jonas Julius Müller, Sumith Kulal, Tim Dockhorn, Axel Sauer, Dominik Lorenz, Patrick Esser, Frederic Boesel, and Harry Saini. Several of the founders had worked together long before the company's founding – first in a research group focused on generative deep learning models at Heidelberg University and LMU Munich, and later at NVIDIA and Stability AI.
Focus as a competitive advantage
With that kind of backing, Rombach and his team could easily have relocated to Silicon Valley. He was not tempted. In the Valley, he argues, AI companies are locked in a perpetual arms race for talent, driving salaries ever higher and distracting teams from the work itself. In the Black Forest, on the other hand, the team is “super focused,” he told fDi Intelligence.
Freiburg might be a small, rural town but it is anything but isolated: Stuttgart – home to Mercedes-Benz and a dense cluster of industrial companies – is two hours away by car. Heidelberg, the Karlsruhe Institute of Technology, Munich, and Switzerland are all within easy reach. This geography, maintains Rombach, helps with attracting and retaining talent – BFL draws talent from universities across Europe.
The extraordinary results in just two years of trading suggest the strategy is working. BFL shows what can be achieved from Germany. And the world will be watching.
Want to benefit from Germany’s AI opportunities?
Asha-Maria Sharma
GTAI’s AI expert
