Callosum
Infrastructure for heterogeneous AI systems that optimizes model inference across diverse chip architectures [0, 1].
Callosum is an ai infrastructure company based in GB. It has raised $100 million in disclosed funding. Its latest round was a Seed of $100 million in October 2026.
Overview
Callosum provides infrastructure designed for heterogeneous AI, moving away from homogeneous chip architectures to optimize machine learning performance [0, 2]. The company’s platform offers "tailored inference," a service that continuously profiles the relationship between models, algorithms, and hardware configurations [1]. This approach allows customers to disaggregate agentic workflows, deploying specific tasks across a variety of silicon accelerators through a unified API library [1]. By co-optimizing models and hardware, Callosum aims to improve cost and speed efficiency beyond standard inference solutions [1]. Founded by a team of experts spanning neuroscience, compute, and artificial intelligence, the company operates across the full stack [2]. Callosum has secured $100M in seed funding to support its infrastructure development [Registry]. Its ecosystem includes partnerships with various silicon manufacturers, enabling access to diverse accelerator hardware [1]. The firm is backed by investors including Atomico, Plural, DCVC, the UK Sovereign AI fund, and ARIA [2].
Funding
Total disclosed: $100M across 1 round. Computed only from sourced rounds.
Questions and answers
What does Callosum do?
Infrastructure for heterogeneous AI systems that optimizes model inference across diverse chip architectures [0, 1].
How much has Callosum raised?
Callosum has raised $100 million in disclosed funding across 1 round tracked by OSH.
Sources
- 1.Europe’s biggest seed rounds of Q3 2026: Top tech startups to watch — Tech.eu, Oct 26, 2026
- 2.Callosum · Official
- 3.Callosum · Official
- 4.Callosum · Official