Callosum Raises $100 Million Seed Funding To Build Heterogeneous AI Compute Platform
By Amit Chowdhry ● Aug 23, 2026
Callosum has raised a $100 million seed round led by Atomico to build a global platform that orchestrates AI workloads across different models, chips and infrastructure based on requirements such as cost, speed and energy efficiency. Plural, DCVC and the UK Sovereign AI Fund participated significantly in the financing alongside additional investors and angel backers. The round also marks the first investment made by the UK Sovereign AI Fund.