Prometheus is a secretive physical-AI company co-founded by Jeff Bezos and the Stanford scientist Vik Bajaj, built to automate the slow, expensive work of designing and manufacturing real-world systems. In 2026 it became one of the most richly valued AI startups ever when it raised $12 billion at a valuation of roughly $41 billion, cementing physical AI as the year's most aggressively funded new frontier.
What Prometheus is building
Where most of the AI industry has focused on software that reads, writes, and generates images, Prometheus aims at the engineering of physical objects. The company describes software meant to automate the design of complex systems, from jet engines and computer chips to bridges and drug compounds, and its founders describe the goal in unusually concrete terms as an "artificial general engineer."
That places Prometheus in the category the industry calls physical AI, systems intended to understand the laws of physics and learn through interaction with the real world rather than only from text and images. Proponents argue the approach can compress design and manufacturing cycles that today take years and consume enormous engineering resources.
Funding and leadership
The $12 billion round drew capital from Bezos himself alongside major financial institutions including JPMorgan Chase, Goldman Sachs, and BlackRock. It was the company's second major raise, following an initial $6.2 billion when Prometheus launched in late 2025, pushing total funding past $18 billion in roughly seven months, with much of it earmarked for the company's substantial computing needs.
Bezos serves as co-chief executive alongside Bajaj, a former co-founder of Alphabet's life sciences unit Verily. The company has about 150 employees across offices in San Francisco, London, and Zurich, and has kept the specifics of what it has built under wraps, though Bezos has pushed back on the idea that the operation is hidden.
Why investors are crowding in
The Prometheus round did not happen in isolation. Venture and institutional capital has poured into physical AI on the argument that the physical world creates moats software alone cannot: proprietary data from real systems, hard-won manufacturing know-how, and regulatory and safety expertise that are difficult to replicate.
For founders, the thesis is reshaping where opportunity lies. As foundation models for text and images become commoditized, the harder, more capital-intensive problems of robotics, industrial design, materials, and advanced manufacturing are drawing fresh attention, with durable advantages expected to accrue to companies that pair AI with deep domain expertise and real-world feedback.
Frequently asked questions
What is Prometheus building?
Prometheus is developing what it calls an "artificial general engineer," AI software meant to automate the design and manufacturing of complex physical systems such as jet engines, chips, bridges, and drug compounds.
How much did Prometheus raise?
It raised $12 billion at a valuation of roughly $41 billion. Combined with an earlier $6.2 billion raise at launch, total funding has passed $18 billion in about seven months.
Who founded Prometheus?
It was co-founded by Jeff Bezos and Vik Bajaj, a Stanford scientist and former co-founder of Alphabet's Verily. The two serve as co-chief executives. Backers include JPMorgan Chase, Goldman Sachs, and BlackRock.
What is physical AI?
Physical AI refers to systems designed to understand the laws of physics and learn through interaction with the real world, rather than only from text and images. Supporters argue it is harder for rivals to replicate than pure software.
Where is Prometheus based?
The company has about 150 employees across offices in San Francisco, London, and Zurich, and was launched in late 2025.