5–6 June 2026, Prague

AI and Sustainability:

Friend or Foe?

This is not a gardening club.

Five years in, GreenHack 2026 is still where humanity teams up with AI to tackle sustainability’s end-bosses: climate chaos, waste, reckless production, disappearing resources. We experiment, prototype, and stress-test ideas that actually help. AI isn’t the hero — it’s the sidekick we’ve all been waiting for.

AI can be at the core of what you build but sustainability leads the way. We use AI to reduce waste, save resources, and create real environmental impact, not to fuel overconsumption. At GreenHack, technology serves the planet, not the other way around.

We invite students, designers, engineers, and tech-savvy creators to join the challenge. Register as an individual or form a team of 2–4 members — bring your skills, curiosity, and a willingness to build something that matters.

When: 5–6 June 2026

Where: 42 Prague, Kolbenova 1021/9, Prague 9

Timeline 2026

19th March

Registration Opens

5th May

Invitations Start Going Out

20th May

Registration Deadline

5-6 June

Hackathon Weekend

Prizes

1st Place: 2000 €

2nd Place: 1000 €

3rd Place: 500 €

ČEPS PRIZE: MetaQuest VR Glasses

More partner prizes coming…

Challenges

Grid Pulse

Energy systems are becoming more dynamic, decentralized, and weather‑driven than ever before. As renewables grow and uncertainty increases, operators need new ways to see, understand, and anticipate what’s happening across the grid. Build an AI‑powered, visually strong map‑based view of the power grid that turns complex data into clear insight — helping humans stay in control of a rapidly changing energy system.

2. Renovate Now*

Build a digital tool that helps apartment building owners see why energy renovation pays off now—through clear costs, benefits, financing options, and next steps. The goal: turn hesitation into action and make renovation feel achievable, valuable, and future-proof.

*I acknowledge that by registering for the ČS challenge, the personal data provided will be processed by Česká spořitelna, a.s. in accordance with the applicable legal provisions, in particular Regulation (EU) 2016/679 of the European Parliament and of the Council of 27 April 2016, the General Data Protection Regulation (GDPR). More information on how we process the personal data provided is available here.

3. BlackOut Prague

Design a practical solution that helps cities, institutions, and communities prepare for blackouts and cascading crises. Improve resilience, coordination, and communication when critical systems fail—and turn disruption into faster, smarter response.

4. Responsible Agents at Work

AI agents are no longer just chatbots. They read context, make decisions, send messages, trigger workflows, handle transactions, and increasingly act like virtual employees. Build a practical tool, framework, dashboard, or control room that helps organizations deploy teams of AI agents responsibly. Make their work visible, auditable, secure, energy-aware, socially safe, and easy for humans to supervise.

5. AI Skill Bridge

Companies invest in AI tools and people are already experimenting—that's progress. But resources are being wasted: natural resources (water, electricity) because tools aren't used efficiently, and human potential because employees don't know how to leverage what's available. The connection between people and technology remains underutilized.

Build a peer-to-peer learning platform where employees discover available tools, learn to apply them strategically, and share knowledge across teams.

6. The Apartment EV Gap

EV ownership is easy if you live in a house: plug in at night, drive in the morning. For people in apartment buildings, it's a different story. No private outlet, no rooftop solar to tap into, no decision they can make alone. The result: the largest group of potential EV owners is effectively locked out of the transition, not by cost or willingness, but by a daily logistics problem nobody has solved for them.

Build a digital tool, platform, or service that helps apartment dwellers without private charging become EV owners, or stay happy ones. Tackle the decision, the logistics, the building politics, shared infrastructure, or a new business model entirely

Agenda

Friday, 5 JUNE - # Hack Day 1

08:45–09:30 – Registration

09:30–09:40 – Welcome & Keynotes

09:40–10:00 – Organization & Rules

10:00–11:30 – Challenge presentations

11:30–12:00 – Mentor introduction

Saturday, 6 JUNE - # Hack Day 2

09:00–10:00 – Workshop: How to pitch?

12:00 – Submissions deadline

13:00–17:00 – Pitch session

17:30 – 18:30 – Winners annoucement

Venue: 42 Prague

Address:

42 Prague, Kolbenova 1021/9, Prague 9

Hackathon Partners

Proud partner of EU GreenWeek

Auspices

The event is held under the auspices of First Lady Eva Pavlová, the Government Commissioner for AI Lukáš Kačena, and Prague City Councillor for IT, Smart City, and Science, Research and Innovation Daniel Mazur.