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«The best 2 hours of my week!»

Fun People. Serious Impact.

What the «Hack»?

A Hackathon (short: "Hack") is a word deriving from 'hacking' (= to disrupt) and 'marathon' (= fast and continously). Below you see the 3 Climate Challenges we are currently hacking.


Green Home

Public bi-weekly Hacks

Buildings are responsible for 40% of Europe’s energy consumption and more than 1/3 of its total greenhouse gas emissions. How can we tackle this?


Green Food

Public bi-weekly Hacks

Our Food accounts for a quarter (26%) of global greenhouse gas emissions. How can we reduce this negative environmental impact?


Green Mobility

Start-Up «ÖV42» founded in July 2022

Together with our alliance partners ÖV42 strives to enable AI-powered smart mobility and save CO2 emissions by shifting "from road to rail".

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«Why Hackathons for the Climate Crisis?»

Our Friday Climate Hacks follow a well-developed Open Innovation format. The Hacks allow us to:

  • Enable an Open and Creative Collaboration

  • Harness Collective Intelligence

  • Be highly inclusive and involving experts, students, and people like your grandma

  • Deliver innovative results at an unparalleled level of Speed and Quality 

«What is a possible outcome of a hack?»

A lot of things can happen if great minds unite. The 42hacks Community has already developed a few pretty breakthrough ideas. One of them was turned into a full-fledged start-up promoting AI-powered smart mobility.

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The 4 Key Pillars of our Hacks

«Who can I meet at a Friday Climate Hack?»

Listing all cool people in our Community here would make your fingers sore from scrolling. The best way to find out is to simply join our Hacks!

There you will meet designers, scientists, software engineers, entrepreneurs, sometimes also kids and retired people all hacking ideas to help reduce the risks of Climate Change. You can also bring your own friends and even organise your own Hack with our help!

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  • Can I insert an image, video, or gif in my FAQ?
    Yes. To add media follow these steps: 1. Enter the app’s Settings 2. Click on the “Manage FAQs” button 3. Select the question you would like to add media to 4. When editing your answer click on the camera, video, or GIF icon 5. Add media from your library.
  • How do I edit or remove the “FAQ” title?
    You can edit the title from the Settings tab in the app. If you don’t want to display the title, simply disable the Title under “Info to Display”.
  • «Am I the right person for your hack? I'm not a Software Engineer...»
    Do you care about Climate Change and want to make a difference? Then you are the perfect candidate for our Friday Climate Hacks! Don't shy away if you haven't used online collaboration tools yet. We will onboard you and make sure everyone feels welcome. Our community consists of people from various backgrounds and we guarantee you that everybody can contribute! Our Current Topics are: Green Home, Green Food and Green Mobility.
  • «Why should I join?»
    You wouldn’t be here if you didn’t care about our planet. At 42hacks we create unstoppable ideas to create positive change. By joining our Friday Hacks you contribute to this movement. You connect with like-minded people, apply your knowledge to a relevant challenge, learn new innovation skills and create awareness for one of the most pressing problems of our times!
  • «How does a Friday Hack work?»
    We meet on our virtual platform for 2 h (from 3 to 5 pm CET). Some hacks will be held in German and others in English. No Preparation or Homework is needed for you to join. All you need is a stable internet connection, ideally Google Chrome Browser and an open mind to experience the most meaningful meeting of your workweek! ​ Check out our current challenges on Eventbrite and register! If you would like to organise your own Climate hack, please reach out to We are always thrilled to meet new people!
  • «I love 42hacks' Mission and want to get involved more. How can I reach out?»
    Fantastic! We love returning participants to our Friday Climate Hacks and people who want to dedicate more time and energy to work on creating better futures for all of us! Join our group of volunteers and continue the conversation on Slack. To get access simply contact us via e-mail to We look forward to hacking with you!
  • «Do I need to prepare anything to join a Friday Climate Hack?»
    No pre-requisites or homework is needed for you to join. If you worked with «Miro» before you'll have a great advantage but it is not a must. Come with a smile and eagerness to make a positive impact for the Climate Crisis. However, here are some technical tips for you to have a great experience: When you login to our event, we recommend to use Google Chrome as your default browser Also you want to ensure that you have a good internet connection and using a laptop (not smartphone). Joining from your smartphone won't work to fully immerse and collaborate. Register for an Upcoming Hack today!
  • «What expects me at a Friday Climate Hack?»
    Short Answer: The most meaningful and fun meeting of your workweek. :-) Long Answer: The Friday Climate Hacks follow a well-developed Open Innovation format. They are fun, engaging, and always mission-driven. We start by a quick introduction to onboard everyone into our virtual workspace. Please be on time to make the most out of your experience. You choose your stream based on your interest and we get straight to work. An experienced facilitator team will guide you together with other participants through the session. We leave time for discussion, share-back, and presentations at the end. The session takes 2 h with an added «Lounge» at the end to connect with people in a relaxed and casual environment. –An amazing way to end your week, drift into the weekend and meet new people. Please note: Most streams will be held in English, others in German. We adapt according to the participants. What are you waiting for? Register today
  • «How can I join a Friday Climate Hack?»
    Simply register for one or several upcoming hack events via Eventbrite. Some technical tips: When you login to our event, we recommend to use Google Chrome as the default browser, have a good internet connection and using a laptop. Joining from your smartphone won't work to fully immerse and collaborate. Having worked with Miro before is helpful but not a must. Please note: Most streams will be held in English, others in German. We adapt according to the participants.
  • «Who is 42hacks?»
    42hacks is an internationally growing Climate Hacker Community aiming to close the gap between Climate Promises and Climate Protests. We believe in the power of collective creativity and open innovation delivered through fun and engaging hackathon formats. Together with entrepreneurs, start-ups, scientists, artists, climate justice experts, and citizens we want to positively impact the planet and help reduce greenhouse gas emissions. You can learn more about us here Are you curious and care about the Climate and how it affects our planet and people? Join us!

We need everyone to make a difference.
Hack the Climate Crisis with us!

You are a
Concerned Citizen

You are concerned about ClimateChange and want to help by volunteering your time and shareideas?

We can guarantee fun people collaborating for seriousimpact! Join our weekly, freeonline Hackathons. 

You are already or wish to be workingon a Climate-related startup idea?You need some inspiration, you want to share your ideas or lookfor new team members?

The 42hacks Community connectspeople who fight for the same cause! 

You are a
Disruptor / Innovator

You represent a
Company / Municipality

Climate is an increasingly importanttopic in your organisation, company or municipality and you look for strong partners?

We are already working with a largenumber of employers and politicians and are happy to connect with you. 

FAQ Anker

Reach out to learn more about 42hacks, how to join a Friday Hack or even organise your own.
I'm happy to help you!


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