The London-based startup Callosum Technologies, founded by Cambridge-trained neuroscientists Danyal Akarca and Jascha Achterberg, has raised more than $110M in cumulative funding to build orchestration software that breaks AI workloads into subtasks and assigns each one to the best possible combination of chips and models.
From stealth to $100M seed round
Callosum emerged from stealth on February 26, 2026, backed by $10.25M in pre-seed funding. By August 2026, Callosum announced a $100M seed round led by Atomico, with participation from Plural, DCVC, and the UK’s Sovereign AI Fund, putting it among the largest seed rounds ever raised in Europe.
On top of the venture funding, Callosum secured a $2.9M grant from ARIA, the UK’s Advanced Research and Invention Agency, earmarked for heterogeneous computing research.
The neuroscience angle
