GreenHack — A sustainability hackathon

GreenHack / Edition 2026

AI and Sustainability: Friend or Foe?

5–6 June 2026 / 42 Prague / 90+

Twenty-four hours is enough to ask a better question — and build a first answer.

On 5–6 June 2026, more than 90 participants came to 42 Prague to explore AI and Sustainability: Friend or Foe? They worked on six challenges spanning energy, renovation, resilience, responsible AI, skills and electric mobility.

The winning projects are early prototypes. Their long-term impact will depend on what happens after the hackathon: testing, collaboration and thoughtful implementation.

Built in a day. Worth a closer look.

  1. 1st place

    An AI copilot for the power grid

    Walking legs

    An AI assistant that helps power grid operators make sense of operational data and investigate emerging issues.

    2026 / Grid Pulse
    2,000 €
  2. 2nd place

    renovuj.me

    Tinkering Hyena

    A tool to help apartment building owners make shared decisions about renovation and energy savings.

    2026 / Renovate Now
    1,000 €
  3. 3rd place

    Does an EV fit your everyday life?

    IOC

    A practical assessment of EV suitability and charging options based on everyday mobility.

    2026 / The Apartment EV Gap
    500 €

All projects ↗

A few moments from the room

Participants gathered at GreenHack at 42 Prague
Participants gathered at GreenHack at 42 Prague
The GreenHack community during the 2026 event
The GreenHack community during the 2026 event