Stockholmsnorrskenet Management backs Callosum in $100 million seed round led by Atomico

• Stockholmsnorrskenet Management AB backed Callosum in a USD 100 million seed round led by Atomico.
• Callosum builds software that co-optimizes AI models and chips, routing inference workloads to the most suitable processors.
• The company also previously raised a USD 10.25 million pre-seed round less than six months before the seed financing.
• Proceeds will scale the platform, deepen partnerships across chip ecosystems, and expand headcount.
• Callosum reported production use cases showing 4x faster performance, 70% lower compute costs, and 10% higher task success rates.

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