Atomico

“Callosum raised a $100M seed round — a figure that would have been a large Series B just a few years ago. This signals that the seed stage is being redefined for capital-intensive infrastructure startups.”

“Callosum ($100M seed for AI workload routing software)”

“Callosum, a London-based startup that makes software to match specific AI tasks with different models and chips, raised a $100 million seed investment led by Atomico.”