London-based AI software startup Callosum has secured $10.25 million in new funding to expand its system-level software for heterogeneous AI compute environments.
The round was led by European early-stage investor Plural, with additional backing from the Advanced Research and Invention Agency and angel investors including Charlie Songhurst, Stan Boland of FiveAI, and John Lazar, Fellow of the Royal Academy of Engineering.
Enabling AI Across Mixed Hardware Architectures
As AI infrastructure investment continues to concentrate around a limited number of dominant GPU platforms, Callosum is positioning itself around a different thesis: enabling multiple chip architectures to operate together efficiently.
Rather than depending exclusively on large, uniform GPU clusters, the company develops orchestration software that distributes AI workloads across diverse processors. These include alternative accelerators and cloud-native chips, allowing models to run in mixed hardware environments.
By coordinating compute tasks at the system level, Callosum aims to improve flexibility, cost efficiency, and infrastructure sovereignty for AI operators.
Advertisement
Orchestration At The Core
Led by Danyal Akarca and Jascha Achterberg, Callosum focuses on AI workload orchestration and heterogeneous hardware scheduling. Its platform is designed to dynamically allocate tasks across different chips based on performance characteristics and availability.
This approach allows enterprises and infrastructure providers to integrate a broader range of processors into their AI stacks, rather than relying on a single hardware vendor or architecture.
Expanding R&D And International Presence
The newly raised capital will primarily support research and development, expansion into the U.S. market, and deeper integration with custom hardware aligned to the company’s multi-chip strategy.
As demand for scalable and diversified AI infrastructure grows, Callosum aims to position its software as a foundational layer for next-generation compute environments.
About Callosum
Callosum is a London-based AI infrastructure company building system-level orchestration software for heterogeneous compute environments. By enabling AI models to run across diverse chip architectures, the company seeks to create more flexible, efficient, and sovereign AI infrastructure.
