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Companies / Callosum

Callosum

London, United Kingdom

Callosum is building infrastructure where heterogeneous chips and intelligence co-evolve to solve the world's hardest problems.

AI & Machine LearningCybersecurity

Callosum, based in London, United Kingdom, has 10 investors on file, among them Acclimate Ventures, AlbionVC and DCVC. Its latest round on record is Seed, 20 Aug 2026, of 2 rounds. Its site was last checked 13 Nov 2026: site answers.

callosum.com

Funding

2 rounds on record
Latest roundSeed20 Aug 2026
Since that round3 monthsno later round on record
Time between rounds6 monthson average, over 2 rounds
Investors in its rounds82 with a VCinfo profile
Aug 2026SeedLed by Atomico, with DCVC, UK Sovereign AI Fund and 4 others
Feb 2026SeedLed by Charlie Songhurst, with 3 others

Round sizes and total raised are on Fundup AI, our sister product for funding data.

Investors

10 investors on file
InvestorEvidenceType
Acclimate VenturesPortfolio pageVenture capital
AlbionVCPortfolio pageVenture capital
DCVCPage + roundVenture capital
Earth Venture CapitalPortfolio pageVenture capital
Entrepreneurs FirstPortfolio pageAccelerator
Norrsken VCPortfolio pageVenture capital
PluralPortfolio pageVenture capital
Samos InvestmentsPortfolio pageVenture capital
Transpose PlatformPortfolio pageVenture capital
UK Sovereign AI FundPage + roundVenture capital

A company is shown only after its own site answers and carries its name. Sites are checked again on a schedule, because domains lapse and get bought. Round stages and dates come from Fundup AI; investor links come from portfolio pages and rounds; other facts name their source when you point at them. How we grade the data

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VCinfo API
$ curl -H "X-API-Key: YOUR_KEY" \
  https://api.vcinfo.io/v1/companies/callosum.com/investors

# also
GET /v1/companies/callosum.com
GET /v1/companies/callosum.com/news
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