The Companies Fighting Our Biggest Battles with High-Impact Solutions

We combed the global cleantech innovation ecosystem to find the top 50 early-stage companies dedicated to high-impact solutions that are nothing short of transformative. In our report, you'll meet:

• Innovators developing sustainable food sources
• Visionaries applying genius to recycling clothing
• Reformers delivering cleaner heating
• Leaders changing the way we move around.

Plus, you'll get to know more about the scale of the challenges ahead and the technologies that will help us find better, more sustainable ways to live.

Get the Complete Report

Download the Complete 50 to Watch Report

Many say the climate crisis is irreversible. We’re guilty of too little, too late. And even the voices of millions of protesters only serve to underline our failures.

They may be right. But, we believe determination and innovation offer hope.  The 50 to Watch report introduces you to the early-stage companies fighting to deliver high-impact solutions that can change the way we live.

  • Meet companies selected for their outstanding potential by over twenty early-stage innovation experts and our own analysts.
  • Gain insight into the scale of the challenges that inspire the companies on the list.
  • Explore case studies on early-stage companies challenging the way we live with fresh innovation and business models.

Latest Insight on 50 to Watch Companies


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In the face of the climate crisis, we are seeing a new generation of innovators rising to the task and developing high-impact solutions to t...

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About Cleantech Group

At Cleantech Group, we provide research, consulting and events to catalyze opportunities for sustainable growth powered by innovation. We bring clients access to the trends, companies and people shaping the future and the customized advice and support businesses need to engage external innovation.

Industries are undergoing definitive transitions toward a more digitized, de-carbonized and resource-efficient industrial future. At every stage from initial strategy to final deals, our services bring corporate change makers, investors, governments and stakeholders from across the ecosystem, the support they need to thrive in this fast-arriving and uncertain future.

The company was established in 2002 and is headquartered in San Francisco with a growing international presence based in London. Our parent company, Enovation Partners, is based in Chicago.

Join us in Paris on 14 November for the 50 to Watch Summit

Meet the companies fighting our biggest battles with high-impact solutions during a series of sessions that cover topics as diverse as innovation in proteins, clothing recycling, mobility and energy. Whether you're an entrepreneur, an investor or a corporate change maker, you'll get direct insight into emerging high-impact solutions and their business potential. It's the perfect place to meet new partners.

Find out more