# Callosum

> Heterogeneous intelligence layer that routes each AI task to the best model and chip.

## Why it is interesting

August 20, 2026: $100M seed led by Atomico with Plural, DCVC, and UK Sovereign AI — one of Europe’s largest seeds — for inference routing after a $10.25M February stealth round. Cerebras partnership with named cost/latency claims.

## Profile

- **Latest funding:** Seed — $100M (August 2026)
- **Latest known valuation:** Not publicly disclosed
- **Total disclosed equity funding:** $110M
- **Stage:** seed
- **Status:** private
- **Industries:** ai-ml, infra-cloud, developer-tools
- **Coverage:** full
- **Last updated:** 2026-08-31
- **Latest funding investors:** Atomico, Plural, DCVC, UK Sovereign AI Fund

## Key facts

- Aug 20, 2026: $100M seed led by Atomico (company/Atomico)
- Prior $10.25M Feb 2026 stealth round
- UK Sovereign AI Fund participation; Plural and DCVC named
- Cerebras partnership with Atomico-cited 70% cost / 4× speed claims

## Funding history

- Seed · $100M · August 2026
  Source: https://atomico.com/insights/our-investment-in-callosum-building-the-layer-that-makes-ai-compute-work
- Seed (stealth) · $10.25M · February 2026
  Source: https://tech.eu/2026/08/20/callosum-raises-100m-seed-round/

## Related articles

- https://venturecapitaltracker.com/2026-callosum-100m-seed-atomico-heterogeneous-ai
- https://venturecapitaltracker.com/2026-august-30-31-investment-news-robots-inference-world-models
- https://venturecapitaltracker.com/2026-august-vc-news

**By:** [Venture Capital Tracker](https://venturecapitaltracker.com/editorial-policy)
**Last updated:** August 31, 2026

**Editorial note:** AI tools assisted with research, structure, or drafting. Venture Capital Tracker retains human editorial responsibility for factual accuracy, relevance, and source quality before publication.

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Source: https://venturecapitaltracker.com/startup/callosum