Callosum
Intelligent orchestration for heterogeneous AI compute.
London, United Kingdom · Founded 2025 · $110.3M raised
- Headquarters
- London
- Employees
- 1–10
- Founded
- 2025
- Business Model
- B2B
- Website
- callosum.ai
- Total Funding
- $110.3M
- Last Round
- $100.0M SeedAug 2026
- Rounds
- 2
Totals include recorded grants and other qualifying funding, not just equity. What counts toward funding.
Indexed holds 2 funding rounds and 2 investors for this company. The full record is or through the API.
About
Callosum is an AI infrastructure startup building workload orchestration software that enables AI systems to run across heterogeneous chips — not just Nvidia GPUs. Founded by Cambridge neuroscientists Danyal Akarca and Jascha Achterberg, Callosum's software delivers up to 2x accuracy and 7x faster performance by intelligently distributing AI workloads across diverse hardware architectures. The company emerged from stealth in February 2026 with $10.25M in funding led by Plural and ARIA.
Summary
Callosum is an Artificial Intelligence company based in London, United Kingdom, founded in 2025. It has raised $110.3M in total across 2 rounds, most recently a $100.0M Seed round in Aug 2026. Investors include Plural and ARIA Fund.
Tech & App Stack
3 technologies & apps tracked
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Funding History
Aug 2026
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Funding: Pre-Seed through Seed. Amounts, valuations, and investors where available.
Investors
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