Callosum

ActiveOn the United Kingdom Radar · not ranked

Software that splits AI workloads into parts and routes each to the best-suited model and chip.

AI›routing AI workloads across models and chips

Last roundSeed · Aug 2026

Why Callosum is not ranked yet

The Radar lists every known eligible company, sorted by date of last round, with no AI judgement. Callosum enters the ranking once its public data is sufficient for the AI to estimate it. Next United Kingdom edition: 3 Jan 2027.

Funding history

Date	Round	Amount	Type	Investors
Aug 2026	Seed	USD 100M	—	Atomico, Plural, DCVC, UK Sovereign AI

Rounds as cited by Uback’s rankings. Equity, debt and grants are shown separately; only equity rounds count towards the valuation anchor.

Uback rankings

How the AI ranks →

Ranking	Tier	Rank	Edition	Next update
United Kingdom · all sectors	Radar	—	Edition 0 · October 2026	3 Jan 2027

Independent analyses

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What the AI reads

Read by the AI at the next edition.

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Full United Kingdom ranking →

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Investors in Callosum: Atomico · Plural · DCVC · UK Sovereign AI

Last updated: Oct 2026Report an error

Uback is a content publisher and an aggregator of non-binding expressions of interest. It provides no investment advice, receives no mandate and takes part in no transaction. Rankings, ranges and brackets are editorial estimates produced by AI, purely indicative.