Callosum raises €9.2M Seed round

26 February 2026· London, United Kingdom· infrastructure, ai, industrial_software, b2b, software_hardware

The funding will be used to expand Callosum's London-based team, scale its software stack, and secure compute resources to build sovereign AI infrastructure.

Big labs are currently betting that one model will rule them all. We think that's wrong and our work proves this. Nature shows that real intelligence emerges from many systems working together. We’ve brought together incredible talent to enable a paradigm shift in how we build intelligent systems to solve real-world problems, with the infrastructure to make that possible, on any chip, anywhere in the world.

Danyal Akarca, Co-founder

Everyone assumed chip diversity was a disadvantage to be managed. We saw the opposite, that it's an advantage to be exploited. We're not optimising one algorithm on top of the existing stack. We're using software to control all the levers across the entire system, extracting benefits from diversity that others dismiss. Plural understands this mission and we're excited to build alongside them.

Jascha Achterberg, Co-founder

Investors

LeadPlural
Also participating
Charlie SonghurstStan BolandARIAEntrepreneurs FirstJohn LazarBare Metal Ventures

About Callosum

Headquarters
London, United Kingdom
Founded
2024
Team Size
21–50
Sectors
infrastructureaiindustrial_softwareb2bsoftware_hardware

Source: https://tech.eu/2026/02/26/uk-ai-infrastructure-startup-callosum-challenging-ai-silicon-valley-monoculture-comes-out-of-stealth/