From Technology Review, October 6:
Each year, the MIT Technology Review team puts together a list of some of the most promising climate tech companies in the world. Whether early-stage startup or multinational corporation, the businesses we’ve chosen are working on technologies to help us address climate change or adapt to our warming world.
There’s an urgent need for these innovators: We must begin to drastically reduce emissions to avoid the deadliest impacts of climate change, while also contending with its harmful effects.
We hope that this list highlights the progress the world is making to tackle the climate crisis, as well as the breadth of solutions required. From energy storage powered by carbon dioxide to cleaner ways to make cement and refine critical minerals, these companies are building technologies to address the acute challenges we face.
This is the fourth annual edition of this list. Learn more about how we chose the 2026 slate.
Energy Dome and its carbon dioxide batteries
Energy Dome is using the gas to deliver cheap long-duration energy storage for the grid....
- Industry: Energy storage
- Founded: 2020
- Headquarters: Milan, Italy
- Notable fact: Energy Dome has plans for 30 gigawatt-hours’ worth of projects across five continents.
....MUCH MORE
WaveSave and its portable rubber dam
The Dutch company has deployed its mobile barrier during floods on three continents to protect farms, hospitals, and water treatment plants.
- Industry: Flood barriers
- Year the company was founded: 2017
- City and country of headquarters: Eindhoven, the Netherlands
- Notable fact: WaveSave is demoing its SlamDam product on New York City’s Governors Island as one of seven winners in a competition for urban climate adaptations. The barrier is installed at a site where high tides and waves from passing ferries often wash ashore.
....MUCH MORE
And the rest of the list:
https://www.technologyreview.com/2026/10/06/1143800/2026-climate-tech-companies-to-watch/
