Pasteur Labs, developer of Simulation Intelligence (SI)—a next-generation technology fusing AI/ML with physics simulation—has acquired FOSAI, a provider of space systems and autonomy solutions for aerospace and defense. The deal, financial terms undisclosed, extends Pasteur’s reach into mission-critical deployments and positions the company for a public platform launch in 2025.
Expanding AI-Native Simulation Into Mission-Critical Domains
FOSAI has built a reputation as a trusted partner for the U.S. Space Force, DARPA, and commercial aerospace primes, specializing in plug-and-play digital platforms that integrate data services and enable AI on forward-deployed space vehicles.
By combining FOSAI’s systems integration expertise with its Simulation Intelligence Platform, Pasteur Labs plans to address a key challenge: bridging AI-native simulation with legacy operational systems in aerospace, automotive, nuclear energy, and beyond.
“This acquisition represents a natural evolution of our mission,” said Alexander Lavin, CEO of Pasteur Labs. “With FOSAI’s track record of delivering mission-critical solutions, we can deploy Simulation Intelligence where it creates the most value—in domains demanding both cutting-edge innovation and unwavering reliability.”
Why It Matters: AI + Physics Simulation
Pasteur’s Simulation Intelligence Platform allows human-machine teams to explore exponentially larger R&D design spaces by modeling multi-scale phenomena with high causal accuracy. This capability unlocks faster innovation in complex systems, from spacecraft autonomy to nuclear reactors.
“The future of autonomous systems depends on our ability to model cause-effect mechanisms with unprecedented accuracy and speed,” said Gregory Falco, CEO of FOSAI. “Pasteur Labs’ AI-plus-physics approach is exactly the kind of foundation our most demanding aerospace and defense applications require.”
Dual-Use Applications and Trusted Partnerships
FOSAI’s work, while often confidential, has underpinned key federal initiatives requiring secure, robust, and scalable platforms. The acquisition signals Pasteur’s ambition to become the de facto standard for AI-driven digital engineering across dual-use (commercial and defense) applications.
Pasteur Labs’ team includes veterans from NASA, Tesla, Nvidia, and Ansys, bringing expertise in multi-physics modeling, distributed computing, causal ML, and human-machine teaming. With FOSAI onboard, integration is already underway, including pre-release deployments of the SI Platform to government and commercial customers.
“We’re not just acquiring a company—we’re gaining practical wisdom from deploying advanced technologies in demanding environments,” Lavin added.
Looking Ahead
Pasteur Labs is set to publicly launch its Simulation Intelligence Platform in late 2025, with a pipeline of data generation products and end-to-end physics-AI applications to follow. For aerospace and defense organizations, the acquisition promises faster, safer, and more reliable digital integration of next-gen autonomy and simulation tools.
