Callosum
The Intelligent Systems Company.
Callosum is a 11-50-employee Research Services company based in London, England. Founded in 2025. Has raised $100M, most recently at the Seed stage. Its most recent round on file is dated Aug 20, 2026. Atomico, DCVC, Plural and UK Sovereign AI Fund led it, at a $6.5B valuation. Adamlead has 10 contacts on file at Callosum.
Callosum funding and company details
- Raised
- $100M
- Stage
- Seed
- Last round
- Aug 20, 2026
- Employees
- 11-50
- Headquarters
- London, England
- Website
- callosum.com
- Founded
- 2025
- Revenue
- –
Who invested in Callosum
Callosum's latest round: $100M Seed at a $6.5B valuation, Aug 20, 2026.
Led by Atomico, DCVC, Plural and UK Sovereign AI Fund.
Read from pulse2.com, siliconangle.com, siliconrepublic.com. Spot something wrong? Email support@adamlead.com.
Callosum in the news
- Callosum Raises $100 Million Seed Funding To Build Heterogeneous AI Compute Platformpulse2.com · Aug 23, 2026
- AI workload optimization startup Callosum raises $100Msiliconangle.com · Aug 20, 2026
- Callosum raises $100M in one of Europe's largest seed roundsDealroom · Aug 20, 2026
- Callosum raises $100m to make AI workloads cheaper, with the British state on the cap tableThe Next Web · Aug 20, 2026
- Callosum Lands $100M Seed to Route AI Tasks Across Any Chip, Bypassing Nvidia Monoculturetechtimes.com · Aug 20, 2026
- UK AI start-up Callosum secures $100m in seed funding roundsiliconrepublic.com · Aug 20, 2026
People at Callosum
| Name | Title | |
|---|---|---|
 Adrian Bertagnoli | Head of Product | a***@callosum.comVerified |
Benedetta Gaggio | General Manager | b***@callosum.comVerified |
 Calum Kirkcaldy | Talent | c***@callosum.comVerified |
 Danyal Akarca | Co-founder | d***@callosum.comVerified |
Hamzah Chariwala | Founding Engineer | h***@callosum.comVerified |
James Chalmers | Head of Ecosystem and Partnerships | j***@callosum.comUnverified |
 Jascha Achterberg | Co-Founder and CTO | j***@callosum.comVerified |
Natalie Wallis | Operations Manager | n***@callosum.comVerified |
Ragav Manimaran | Head of US | r***@callosum.comVerified |
Yang Chu | Founding Engineer | y***@callosum.comVerified |
Companies similar to Callosum
Frequently asked questions
When did Callosum last raise funding?
Callosum's most recent round on file is dated Aug 20, 2026, at the Seed stage. Total funding on file: $100M.
Who invested in Callosum?
Atomico and DCVC and Plural and UK Sovereign AI Fund led Callosum's latest round (Seed). Read from the articles that covered it, linked on this page.
How many contacts does Adamlead have for Callosum?
We have 10 contacts on file for Callosum. Each email shows its verification status and a confidence score.
What industry is Callosum in?
Callosum is categorized under Research Services on Adamlead, alongside 15 other companies in the segment.
Can I get verified emails for people at Callosum?
Yes. Start a 7-day free trial and reveal any contact's email for one credit. Every address carries a confidence score, and revealing the same contact again is always free.
What companies are similar to Callosum?
Other Research Services startups on Adamlead, closest first by funding stage, include Perceptron, Engram, AMI Labs. See the list below for more.
Reveal verified contacts at Callosum
Callosum raised on Aug 20, 2026. Reach out while the budget is fresh. 7 days free, no card required.
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