Callosum
A UK AI infrastructure startup founded by Cambridge neuroscientists offering a counter view to the “monoculture” that believes superintelligence
Callosum has raised €94M across 2 funding rounds from 6 investors, most recently a Seed round in Aug 2026. Based in London, UK; active in AI. Data as of 28 Oct 2026.
London, UKwww.callosum.com ↗
Total raised
€94M
€94,285,256
Funding rounds
2
Investors
6
distinct backers
Active since
2026-02
latest 2026-08
Funding by year
EUR raised per year · 2026 YTDCallosum — funding by year — interactive chart.
Data table
| Callosum — funding by year | |
|---|---|
| 2026 | €94M |
Signals
High confidenceRaise-next likelihood25
base rate 44% for Seed
- ▼ Raised very recently
- ▲ Up-round momentum
- ▼ Low backer re-investment
Exit likelihood19
base rate 11% (2+ rounds)
- ▲ €30M+ raised
- ▼ Young (<3y)
- ▲ Recently backed by strong-exit-track investors
Timing: too soon vs cohort gap · momentum up. Funding-only estimates, not predictions and not investment advice — see signals.
Funding rounds
2 rounds| Date | Stage | Amount | Investors | |
|---|---|---|---|---|
| 2026-08-20 | Seed | €86M | Angel Investors,Atomico,DCVC,Plural,UK Sovereign AI Fund | View deal → |
| 2026-02-26 | Other | €8.7M | ARIA Fund,Plural | View deal → |