We build open digital infrastructure to power local climate action around the world.

CityCatalyst is a project from Open Earth, a non-profit on a mission to speed up climate action through open digital tools. We bring together science, technology, and big-picture thinking to build the kind of infrastructure the world needs to tackle climate change, collaboratively, and at scale.

Visit openearth

Our mission

Empower cities and regions to take climate action by simplifying how they collect, manage, and use climate data.

Our Vision

A world where every city, no matter its size or capacity, can easily access the tools and data needed to plan, report, and scale their climate solutions.

Why Cities?

Cities are on the frontline of the climate crisis.

They generate over 70% of global emissions, yet often lack the tools, resources, and data to act effectively.



Inventories take months, data is messy or missing, and access to finance requires evidence that many local teams can’t produce.


We believe cities are critical climate actors. That’s why we built CityCatalyst.

The Story Behind CityCatalyst

CityCatalyst was born from years of working with local governments and networks like ICLEI, UNFCCC, and the Global Covenant of Mayors.
We saw a clear need: A user-friendly, open digital product that could help cities easily manage emissions data, climate risks, and action planning while meeting global standards.


So we created CityCatalyst:
- A platform designed for cities of all sizes and capacities
- Built with local realities in mind, not just technical perfection
- Open by default, scalable, and ready to integrate with existing tool

sIt started as a collaboration between climate experts, software developers, and local practitioners, and today, it’s growing through partnerships with cities, consultants, and networks around the world.

Explore the platform

Our Team

We’re a global, multidisciplinary team of climate and technology professionals working across disciplines and time zones to accelerate local climate action.

Meet the team

Our team includes; Climate scientists, policy experts, Product managers, Software engineers & data specialists, UX researchers & local government collaborators, Marketing strategists & partnership builders

We believe in open knowledge, shared progress, and climate justice. And we’re committed to co-creating solutions that are accessible, adaptable, and impact- driven.

We build open digital infrastructure to power local climate action around the world.

CityCatalyst is a project from Open Earth, a non-profit on a mission to speed up climate action through open digital tools. We bring together science, technology, and big-picture thinking to build the kind of infrastructure the world needs to tackle climate change, collaboratively, and at scale.

Visit openearth