Hack Day

Safer and more resilient cities start with an idea

On 24-25 September 2026, Tallinn will host an international hackathon as part of Estonian Defence Week. During two intensive days, new solutions will be born to make cities safer, more resilient and more people-centred.

The Hackathon will take place at the Energy Discovery Centre and will bring together participants from all over Europe in cooperation with the cities of Valencia, Helsinki, Lviv and Dnipro.

What to expect?

It's not just a brainstorming session - it's a place where ideas become real solutions.

• For 48 hours you will develop your ideas with mentors and experts.
• get instant feedback from cities and industry experts
• test the real-world potential of your solution
• present your idea to an international jury

Prize fund and opportunities

The best teams will receive:

• A cash prize fund
• The opportunity to further develop the solution with cities
• Access to test environments and pilot projects.
• visibility in the international network

In addition to cash prizes, the focus is also on real opportunities for follow-up - ideas don't stay in the drawer, but move on to testing and development!

For whom?

We welcome anyone interested in contributing to a safer and better performing urban space.

We especially welcome:

• Start-ups and early-stage teams.
• Early-stage start-ups and early-stage start-ups - developers, designers and creative thinkers.
• students and future entrepreneurs
• experts and practitioners in the field

During the Hackathon, teams will work on specific challenges, which will be unveiled shortly.