Climate & Sustainability Hackathons in Europe
Explore 26 climate & sustainability hackathons across Europe. Browse upcoming European events by country, city, format, and prize pool.
Hackathons
15
Avg Prize
$586K
Organizers
34
Sunday, November 15, 2026
Ongoing
Hackathon Hollandse Luchten
In Person
Nov 13 – Nov 19, 2026Hollandse Luchten (Province of Noord-Holland, Waag Futurelab, with RIVM, TNO, GGD)Haarlem, Netherlands
Artificial Intelligence
Climate Tech
Social Impact
Ongoing
GreenBonn Hackathon 2026
In Person
Nov 13 – Nov 21, 2026Centrum für Entrepreneurship, Innovation und MittelstandBonn, Germany
Climate Tech
Data Science
Ongoing
Guardians of the Earth – Space for Change
Hybrid
Nov 7, 2026 – Mar 19, 2027Deutsche Raumfahrtagentur im DLRBremerhaven, Germany
Climate Tech
Monday, November 16, 2026
Wednesday, November 18, 2026
Friday, November 20, 2026
Upcoming
Hackathon Across 2026: Innovating for Water in the Cross-Border Mediterranean Region
In Person
Nov 20 – Nov 22, 2026University of Perpignan Via Domitia (UPVD) in collaboration with the University of Girona (UdG)Perpignan, France
Climate Tech
Social Impact
Upcoming
GreenChem Hackathon
In Person
Nov 20 – Nov 22, 2026United Nations Industrial Development Organization (UNIDO) GreenChem ProjectLviv, Ukraine
Climate Tech
Upcoming
Social Entrepreneurship Hackathon: Collective Intelligence for Sustainable Communities
In Person
Nov 20 – Nov 21, 2026UNIHUB - Universitatea din BucureștiBucharest, Romania
Climate Tech
Social Impact
Entrepreneurship
Upcoming
Milano Agentic City Hackathon
In Person
Nov 20 – Nov 21, 2026NextMindLabMilan, Italy
Artificial Intelligence
Climate Tech
Social Impact
Upcoming
Amsterdam Circularity Hackathon 2026
In Person
Nov 20 – Nov 22, 2026Caty GaitanAmsterdam, Netherlands
Climate Tech
Upcoming
Bioeco Camp
In Person
Nov 20 – Nov 22, 2026Quest for bioeconomyBezannes, France
Climate Tech
Agritech
Upcoming
sprintd Basel · GreenTech Edition
In Person
Nov 20 – Nov 22, 2026sprintdBasel, Switzerland$6K
Climate Tech
Saturday, November 21, 2026
Past hackathons
Recently ended — many run again.
Friday, November 13, 2026
Past
Hack the Water Graph
In Person
Nov 13, 2026Waterschap Amstel, Gooi en Vecht, Waternet and buildingSMART International, with UvA, TU Delft and Amsterdam University of Applied SciencesAmsterdam, Netherlands
Climate Tech
Past
AEC NL Hackathon 2026
In Person
Nov 13 – Nov 14, 2026AEC NL Hackathon with TU/e Built Environment / 4TUEindhoven, Netherlands
Climate Tech
Social Impact
Past
Future City Hackathon 2026
In Person
Nov 13 – Nov 15, 2026Hochschule Heilbronn, EUonAirHeilbronn, Germany
Climate Tech
Social Impact
Past
InnovateTheAlps Hackathon
In Person
Nov 13 – Nov 15, 2026AlpioneersChiemgauer Alpen, Germany$1K
Climate Tech
Monday, November 9, 2026
Friday, November 6, 2026
Thursday, November 5, 2026
Past
Ideathon: Bristol Campus x Headstart
In Person
Nov 5, 2026Headstart TeamBristol, United Kingdom
Fintech
Climate Tech
Past
Nortfina – Exclusive Hackathon for Hivers + Hiring Opportunity
In Person
Nov 5 – Nov 6, 2026Hive Helsinki & NorthfinaHelsinki, Finland$324
Climate Tech
Web Development
Past
Earth Breathing | Hackathon
In Person
Nov 5, 2026Imran EL AZRI ENNASSIRICergy, France
Artificial Intelligence
Climate Tech
Data Science
Past
EIT Water & PDJF Regional HACKATHON 2026
In Person
Nov 5, 2026DIH Innovamare & University of ZadarZadar, Croatia$6K
Climate Tech