CXSoftr
Claude x Softr: AI Build Day Hackathon
30 Sep 2026 · London
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/hackathons/london
Hackathons in London
They run from September through to November 2026. Recurring themes include AI Agents and Fintech. Organisers listing here include Softr, Dealroom.co and Mehedi Mostafa. Dates, prizes and registration links on every listing, updated weekly.
31 upcoming hackathons in London, United Kingdom
DADealroom.co
Dealroom API Hackathon
1 Oct 2026 · London
AHMehedi Mostafa
AlphaBeta Hackathon
1 Oct 2026 · London
EDEuropean Defense Tech Hub
European Defense Tech Hackathon - London
2–4 Oct 2026 · London
MHEncode Club
Metropolis Hackathon Builder Day: London | $250,000 in prizes
2 Oct 2026 · London
PRIZE£250,000
OSBioCraftEd
One-shot Vibecoding Penthouse Game Jam
3 Oct 2026 · London
EHReally Good Culture
EAT_HACK - the world's first AI & eating hackathon
3 Oct 2026 · London
PRIZE£1,000+
LAIterate
London AI x Science Hackathon
3–4 Oct 2026 · London
LHHack-Nation's Global AI Hackathons
London Hub - 7th Hack-Nation Global AI Hackathon
3–4 Oct 2026 · London
PRIZE$30,000+
FSNo 10 Innovation Fellows
Future States: Hackathon at No 10
5–6 Oct 2026 · London
CSReactVision
Ctrl+Space Hackathon -London
8 Oct 2026 · London
LADwelly Group
London AI Hackathon: AI Transformation of Services
10 Oct 2026 · London
PRIZE£5,000
FHSingapore Global Network
Fintech Hackathon
13 Oct 2026 · London
BWHYPE: IRL tech events
Buildathon w/ MongoDB & Vercel & Tavily
14 Oct 2026 · London
SXBriefcase
Stripe x Briefcase: AI FinTech London Hackathon
15 Oct 2026 · London
PRIZE£2,000
AAAI Builders
App After Dark: Mobile App Hackathon
15 Oct 2026 · London
CHCampaign Lab
Chat Hackers - Hack Day
17 Oct 2026 · London
UNTayyeb
Unihackathon
17 Oct 2026 · London
DCCLIP Sound and Music CIC
DMLab Colchester - October: Hackathon Day
17 Oct 2026 · London
IWKCL Womxn In STEM
IKU Womxn in STEM Hackathon
17–18 Oct 2026 · London
FHSeapoint
FinOps Hackathon
20 Oct 2026 · London
DUDatabricks UK
Databricks UK Innovation Hackathon with Colibri Digital
21 Oct 2026 · London
MBMoonfire Events
Moonfire • Build Night Hackathon
22 Oct 2026 · London
ELEncode Club
Encode London Hackathon and Conference
23–25 Oct 2026 · London
LXWomen Who Build 🪄
Lovable x EF x WWB 🪄 Hackathon
24 Oct 2026 · London
CGBright Creative
Canva Gen©️ - Student Hackathon London 🚀
24 Oct 2026 · London
RHDominic Norton
Robomasters Hackathon
24 Oct 2026 · London
YXHector Laine
YFL x Lovable Buildathon
28 Oct 2026 · London
HEKickstart
Hackathon Explore
31 Oct 2026 · London
QDRoxhill Media
Q&A: The day we were hacked – a live comms crisis simulation
3 Nov 2026 · London
HLHouse London!
House London #3 | Data Hackathon
7 Nov 2026 · London
past hackathons
Supermums
Slack Hackathon - Virtual or In-Person
28 Sep 2026 · London
House London!
House London #2 | Data Hackathon
26 Sep 2026 · London
Tenzo
Tenzo's AI Buildathon
23 Sep 2026 · London
Viso Now
The AI Vision Challenge | Apply to Join | Computer Vision Agent of Any Use Case
23 Sep 2026 · London
Event
Customer Onboarding Hackathon
19 Sep 2026 · London
SpaceXAI for London, England
Cursor Commerce London Hackathon
19 Sep 2026 · London
Adeline Events
Adeline Sprint Sessions: Health x AI After Hours
18 Sep 2026 · London
Bincom Dev Center
London Bincom hackathon physical kick off
18 Sep 2026 · London
Zaro.ai
Zaro's BizOps Hackathon @ AWS
18 Sep 2026 · London
GirlsWhoML
GirlsWhoML & PhysicsX Hackathon
15 Sep 2026 · London
Celso Milne
AI Healthcare Hackathon with Anima x OpenAI
12 Sep 2026 · London
notanother.pizza
Community Tooling Hack Day #2
12 Sep 2026 · London
Generalist World - Events
📍London 🌀 Generalist World Hackathon
12 Sep 2026 · London
MULTIC
WORLDS | LONDON Hackathon
12 Sep 2026 · London
enki events
The Future of Finance Hackathon
11 Sep 2026 · London
Encode Club
Rebuild Private Markets: The Ylookup x Encode AI Hackathon
5–6 Sep 2026 · London