Hack4Earth Demo Day: Closing Hacktober with the Green AI Challenge

In celebration of Hacktober, the Hack4Earth Green AI Challenge Hackathon: is running for the entire month of October. Teams from across Hungary and beyond are competing on Kaggle and DoraHacks to design innovative Green AI solutions that make software and infrastructure more energy-efficient, sustainable, and reliable. Read more about competition here. Now it’s time for the grand finale: the Demo Day in Budapest.

What to Expect at Demo Day?
🚀 Finalist Pitches – top teams present their projects live.
🏆 Prize Announcements – prizes and winners announced.
🎤 Keynote Sessions – insights from leading voices in green software, digital sustainability, and open source, featuring perspectives from researchers, NGOs, private sector leaders, environmental activists, students, and global leaders.

This event charges a fee at the door, to purchase tickets online or view prices, please visit organizer website: here.

Live Chat on Slack, contact us directly: Hack4Earth Green AI Challenge Hackathon Community

In hopes to keep the event as open and accessible as possible to underserved communities, we have opened up a complimentary ticket request form. Request free ticket here: https://forms.gle/zx5euBBMvKpeHZ5o9. Closes: 9 November, 2025. (Limited to 20 people on site, apply early)