News

August 20, 2026

Callosum raises $100m seed led by Atomico to tackle AI compute bottlenecks

UK startup’s platform helps developers route workloads across different models and chips to reduce costs

Martin Coulter

2 min read

London-based AI infrastructure startup Callosum has raised a $100m seed round led by Atomico, with support from Plural and the UK Sovereign AI Fund.

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Martin Coulter

Martin Coulter is Sifted's news editor, based in London. You can follow him on LinkedIn and X

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