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Callosum

Callosum

Private
LondonAI, Data & Cloud Infrastructurehttps://www.callosum.com/

Last Round

Pre Seed

Feb 26, 2026

Total Funding Raised

$10.25M

Company Overview

Callosum is an AI infrastructure company that develops system-level software that enables different chip architectures to interact with each other.

Sector

AI, Data & Cloud Infrastructure

Verticals

ML Platforms, Semiconductors, Defense Tech, Cloud Infrastructure

Business Model

B2B

Customer Profile

Subscription SaaS, Usage-Based SaaS, Government Contracts, Services & Consulting

AI Layer

Infrastructure

Keywords

AI infrastructureworkload orchestrationheterogeneous computingsovereign AIsystems-level softwareAI compute optimizationAI fabriccompute fabricmulti-cloud AImulti-chip systemssoftware abstraction layerdefense tech

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Callosum Comps

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CompanyStatusEst. ValuationRev Multiple
OpenAIPrivate$86.0B~40x
CoherePrivate$5.0B--
Competitor 1Public$XX.XBXXx
Competitor 2Public$XX.XBXXx

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Callosum Funding Rounds

Historical fundraising activity

RoundDateAmount RaisedValuationInvestorsSources
Pre SeedFeb 26, 2026
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Callosum Investors

Notable investors and investment history

InvestorRounds
Advanced Research and Invention AgencyPre Seed
PluralPre Seed
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Callosum Filings

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Callosum Filings

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Frequently Asked Questions

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Firmographic Details

HeadquartersLondon
Year FoundedN/A
Last FundingFeb 26, 2026

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