---
format: "aidr-story-markdown/v1"
id: "9d5464bd96612a3ea0dd9c78a66498fa5cbb6e6e4108eb3599a2282e4ee3c6e5"
canonical_url: "https://aidr.today/9d5464bd?lang=en"
title: "Callosum Secures $100M Seed for First UK Sovereign AI Fund Investment"
lang: "en"
requested_lang: "en"
available_langs: ["en","vi"]
translation_fallback: null
fallback_fields: []
published_at: "2026-08-20T08:52:08.000Z"
category: "Funding"
topics: ["funding","infra","inference","chips"]
source_urls: ["https://huggingnews.com/startups/callosum-secures-100m-seed-for-first-uk-sovereign-ai-fund-investment-54c284fa","https://x.com/join_ef/status/2090338234685415554","https://x.com/Techmeme/status/2090330736243200163","https://x.com/SebJohnsonUK/status/2090349950743847205","https://x.com/SebJohnsonUK/status/2090332775211552816"]
summary: "London-based startup Callosum is developing software to route artificial intelligence tasks across a variety of models and semiconductor chips to optimize for cost and speed. The company announced a flagship partnership with Cerebras as part of its strategy to build a platform for heterogeneous intelligence that balances compute capability. The $100M seed round, led by Atomico, marks the first investment from the UK Sovereign AI Fund and is among the largest seed financings in UK history. Founded by Dan Akarca and Jascha, the company previously raised a $10M pre-seed round five months ago."
---

# Callosum Secures $100M Seed for First UK Sovereign AI Fund Investment

> [Open the canonical story](<https://aidr.today/9d5464bd?lang=en>)

**Published:** 2026-08-20T08:52:08.000Z
**Category:** Funding
**Topics:** funding, infra, inference, chips

## Summary

London\-based startup Callosum is developing software to route artificial intelligence tasks across a variety of models and semiconductor chips to optimize for cost and speed\. The company announced a flagship partnership with Cerebras as part of its strategy to build a platform for heterogeneous intelligence that balances compute capability\. The $100M seed round, led by Atomico, marks the first investment from the UK Sovereign AI Fund and is among the largest seed financings in UK history\. Founded by Dan Akarca and Jascha, the company previously raised a $10M pre\-seed round five months ago\.

## Sources

- [Story source](<https://huggingnews.com/startups/callosum-secures-100m-seed-for-first-uk-sovereign-ai-fund-investment-54c284fa>)
- [Story source](<https://x.com/join_ef/status/2090338234685415554>)
- [Supporting source](<https://x.com/Techmeme/status/2090330736243200163>)
- [Supporting source](<https://x.com/SebJohnsonUK/status/2090349950743847205>)
- [Supporting source](<https://x.com/SebJohnsonUK/status/2090332775211552816>)