Hackathons for founders in London

18 hackathons 7 this week

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The London events worth planning around, at a glance.

GB October 2026

October 2026

21 events

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1 Devin Local: London 🇬🇧 18:00 · Hackathon
2 Metropolis Hackathon Builder Day: London | $250,000 in prizes 10:00 · Hackathon
3 EAT_HACK - the world's first AI & eating hackathon 09:00 · Hackathon
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European Defense Tech Hackathon - London London AI x Science Hackathon
5 Big Screen Hack London: (Remote & in Person) 18:30 · Hackathon
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9 Cafe Compute Meetup: London 18:30 · Hackathon
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13 Fintech Hackathon 18:00 · Hackathon
14 Buildathon w/ MongoDB & Vercel & Tavily 17:30 · Hackathon
15 Stripe Startups Build Day London 10:00 · Hackathon Stripe x Briefcase: AI FinTech London Hackathon 17:15 App After Dark: Mobile App Hackathon 18:00 Build on the New Normal 18:00 First Concepts Creative Sprint 4.0 18:00
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17 Real-Time Video Agents Hack - LDN 08:30 · Hackathon Physical AI Hack 09:00
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21 Open Code #21 18:30 · Hackathon
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24 Real-Time Vision Challenge with XRlabs - NVIDIA x Playground x Oxford Seed Fund 10:00 · Hackathon
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Encode London Hackathon
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28 Lovable Buildathon with YFL & Imperial Entrepreneurs 12:00 · Hackathon
29 Hack for Humanity : London (w/ The AI Collective) 09:00 · Hackathon
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Solana Hacker House - London

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About London · October 2026

London's next month runs on hackathons, with the big conferences landing in November. Stripe Startups Build Day on Oct 15 is the one founders will recognize, with GP Bullhound Allstars the same day. Solana Breakpoint lands at Olympia on Nov 15 for three days, its first London edition and 8,000-plus builders, VCs and infra teams. FinTech Connect follows at ExCeL on Dec 1, with its StartUp Launchpad track worth a look, and London Tech Week returns Jun 7, 2027.

Other event types in London

Organizers running hackathons in London