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Let's keep global warming close to 1.5 °C – by supporting & funding climate start-ups

We catalyse exceptional start-ups and young companies to scale climate technologies sustainably in developing and emerging markets.

The CATAL1.5°T [ˈkætəlɪst] Initiative’s ambition is to boost investments in promising early-stage climate ventures from the Global South.

Climate tech alone won’t save the world, but without tech solutions, we don’t stand a chance. That’s why we promote climate tech innovations by providing grant funding, know-how and access to networks of domain experts, mentors and investors.

To ensure long-lasting impact, we also strengthen regional climate tech innovation ecosystems. In all of what we do, we promote diversity, equity and inclusion (DEI). And we pay close attention to the environmental, social and governance (ESG) impacts of the climate tech solutions we support.

We start in Latin America and West Africa.

What’s new at CATAL1.5°T?

CATAL1.5°T for start-ups

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You've got an innovative idea to tackle climate change? Develop it at our Climathons (climate hackathons) – together with other innovators and entrepreneurs from your region!


Your climate solution needs a boost to hit the market? No problem with our pre-accelerator programme: Get from early stage to market readiness with technical support and grants!


You already have a MVP and first users? Our accelerator programme provides you with tailored coaching and mentoring and repayable grants. Let's find a way through the "valley of death" and scale your business!
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For incubators & accelerators

Your organisation is interested in a deep dive into climate tech and sustainability? We have the know-how and tools for you: learn more about climate tech, ESG and DEI in start-up programmes and strengthen your network. Be part of our trainings and dialogues with other incubators and accelerators, the VC community and policymakers.
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For investors

We connect you with investment-ready climate ventures, that take ESG seriously and have expert-validated impact forecasts. So no worries about greenwashing. You can also take part in pioneering trainings on climate performance projections and ESG in venture capital. Join our network and add climate tech to your portfolio.

Applications are open!

We're looking for founders with transformative ideas, solutions and business models that tackle global warming. With our Climathons and pre-accelerator and accelerator programmes, you get the financial, technical and mentoring support you need.

About the CATAL1.5°T Initiative

The Initiative is is funded by the international Green Climate Fund (GCF) and the German Federal Ministry for Economic Cooperation and Development (BMZ). It is implemented by Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) GmbH in cooperation with top-tier global and regional partners.

Learn about us
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Get insights and inspiration

Dive into insights from our ongoing and completed programmes, best practices and lessons learned as we work together to build climate ventures for a net-zero world.
Go to insights

Where is CATAL1.5°T active?

The CATAL1.5°T Initiative is operated by a network of global and regional partners. Latin America and West Africa are the first markets where we’re starting.

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    Dominican Republic

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    Costa Rica



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    Côte d’Ivoire

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    Burkina Faso

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    El Salvador

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Frequently asked questions

You’ve got questions? Here you can find answers. If you have further questions, contact us via the contact form below.