Help solve the world’s greatest challenge. Answer the Call.

Put your coding skills to work in taking on the most pressing issue of our time — climate change. Start building your solution for the 2021 Call for Code Global Challenge for the chance to win $200,000 USD and receive comprehensive support to see your solution deployed.

Our mission

Call for Code invites developers and problem solvers around the world to build and contribute to sustainable, open source technology projects that address social and humanitarian issues, while ensuring the top solutions are deployed to make a demonstrable difference.


Developers, data scientists, and problem solvers have created a unique tech for good community

179 nations

Contributors from around the world created more than 15,000 apps for humanitarian issues.

Multiple ways to get involved

Call for Code has expanded into a broader, always-on, tech for good platform, providing additional opportunities to get involved beyond the yearly Global Challenge. Discover open source projects, including Call for Code for Racial Justice, where you can contribute to make a lasting difference. Enter the Global Challenge and get inspired by the latest solution deployments.

Partner with Call for Code

You don’t have to be a developer to make a difference. Call for Code has the year-round support of enterprises, experts, humanitarian and international organizations, charitable partners, celebrities, and more. Explore the many ways you can support Call for Code.

Partner with us


Founding Partner

Charitable Partner

Program Affiliate