Danyal Akarca
Co-founder of Callosum, the Cambridge chip-interoperability startup backed by the UK Sovereign AI Fund.
Last refreshed: 19 April 2026 · Appears in 1 active topic
Who are the founders behind Callosum and what chip problem are they solving?
Timeline for Danyal Akarca
Mentioned in: UK names first Sovereign AI investees
European Tech Sovereignty- Who founded Callosum AI?
- Danyal Akarca and Jascha Achterberg, both Cambridge PhDs, co-founded Callosum, which builds chip-interoperability software for sovereign AI infrastructure.Source: UK DSIT 16 April 2026
- What does Callosum build and why did the UK government invest?
- Callosum builds software enabling heterogeneous chip architectures to interoperate. The UK Sovereign AI Fund took a direct equity stake in April 2026 as the only equity investment in its first tranche.Source: UK DSIT 16 April 2026
Background
Danyal Akarca co-founded Callosum alongside Jascha Achterberg, both Cambridge PhD graduates. Callosum received a direct equity investment — the only equity stake in the first tranche — from the UK Sovereign AI Fund on 16 April 2026 . The company builds software enabling diverse chip architectures to interoperate, addressing a foundational lock-in problem for European sovereign AI infrastructure.
Beyond their Cambridge PhD background and the Sovereign AI Fund investment, Akarca and Achterberg have no substantial public profile in trade or tech media as of April 2026. The fund's equity investment at this stage suggests DSIT is backing research-stage technology with significant long-term strategic potential rather than an established commercial track record.
The Callosum equity investment is strategically distinct from the compute grants given to the other five investees. Taking equity signals that DSIT believes chip-interoperability software is a scarce, high-value asset rather than a service that can be contracted for at market rates .
