fun people - serious impact

What is 42hacks?

We are a community of climate hackers and start-up entrepreneurs. Together we fill the gap between climate promises and protests. We believe in the power of hackathons, talents and ecosystems.

How can I join?

Joining is almost as easy as watching Netflix. And feels way better! Just dial-in in one of our Friday Climate Hacks listed below.


First Start-up
founded "ÖV42" to 
bring hacked ideas to action with serious impact.

Green Mobility

Goal: How to shift 42% of our traffic to green shared mobility

Current Challenge:


How to

Enable Tech on Mobility 


How to

Predict People Behaviour

How to

Disrupt Train Experience

How to

Become Sexier Than Cars

Join our next hacks

No prep. No homework. No prerequisites. Anyone welcome!


Next Challenge

After successfully launching the Mobility Start-up Ecosystem, we will unlock the Next Challenge. We are exploring new topics: retail, plastic, food, biodiversity, and more.