Accel

Accel is one of the world's leading venture capital firms, headquartered in Palo Alto with major offices in London and Bangalore. Founded in 1983, Accel manages over $50bn in assets across early-stage and growth funds and has backed companies including Facebook, Dropbox, Slack, Spotify and Atlassian. Its London office is one of the most active growth-stage investors in European technology, with a particular focus on enterprise software and deep tech.

On 20 May 2026 Accel co-led Fractile's $220m Series B at a roughly $1bn valuation, alongside Factorial Funds and Founders Fund . Fractile, the Oxford-founded inference-chip startup building SRAM in-memory compute architecture, also brought NATO Innovation Fund, In-Q-Tel (the CIA's venture Arm) and Oxford Science Enterprises onto the cap table. The absence of any UK state vehicle from the round, despite Anthropic being in early talks to buy chips, made Accel's participation the headline commercial validation.

Accel's involvement signals that Fractile's technology is being evaluated as a mainstream growth opportunity, not solely a defence or sovereign-compute bet. For European deep tech, an Accel-led chip round at $1bn without a US-only provenance is notable: it suggests European-origin semiconductor IP can attract Silicon Valley growth capital at Series B scale, a threshold that has historically proved difficult for hardware startups outside the US.