Report

Fastest Growing Climate Tech Companies & Startups (2024)

Apr 24, 2024

Published by

Specter

Report

Fastest Growing Climate Tech Companies & Startups (2024)

Apr 24, 2024

Published by

Specter

Report

Fastest Growing Climate Tech Companies & Startups (2024)

Apr 24, 2024

Published by

Specter

Report

Fastest Growing Climate Tech Companies & Startups (2024)

Apr 24, 2024

Published by

Specter

The climate technology sector is set for significant growth, with its market size expected to rise from $20.34 billion in 2023 to $182.54 billion by 2033, achieving a compound annual growth rate of 24.5%. This growth is driven by a deeper public understanding of climate change, robust environmental regulations, and advancements in technologies such as renewable energy and carbon capture.

As awareness of environmental challenges and the impacts of climate change intensifies globally, the demand for innovative climate tech solutions is rising. These technologies are essential for reducing greenhouse gas emissions, improving energy efficiency, and fostering sustainable industrial practices. With strong investment and regulatory backing, the climate tech sector is expected to grow significantly, catalysing both environmental sustainability and economic development.

Innovations in the sector include lithium-sulphur batteries for electric vehicles, offering enhanced energy storage without critical minerals. A German company is also expanding production of sustainable e-fuels to convert renewable energy into liquid fuels for sectors like aviation and shipping. Additionally, advancements in digital agriculture are transforming sustainable farming practices worldwide.

We Track More Than 3 Million Companies Monthly

Specter provides real-time insights and emerging trends in the private markets. We equip investment firms and corporations with unparalleled, actionable intelligence on private companies.

After analysing the growth data, here are 12 of the fastest growing climate tech companies covering a range of applications:

Commonwealth Fusion Systems (CFS), a spin-out of MIT, recently achieved a pivotal breakthrough in nuclear fusion technology. With six peer-reviewed papers validating their progress, CFS is on track to bring commercial fusion energy to market. Backed by investors like Bill Gates' Breakthrough Energy, CFS aims to have a commercial power plant operational by the mid-2030s, marking a significant step towards limitless, zero-carbon energy.

Founded Date:

2017

HQ Location:

Cambridge, United States

Total Funding Raised:

$

Company Size:

(

501-1000

)

Employee Growth (Last 6 months):

18%

Web Visits Growth (Last 6 months):

160%

Battolyser Systems, founded in 2018, is gaining recognition for its innovative Battolyser technology. This integrated battery-electrolyzer system stores electricity and produces green hydrogen, offering flexibility and efficiency to industries. With support from the European Investment Bank (EIB), Battolyser is set to scale its production facility in Rotterdam, contributing to Europe's green transition goals.

Founded Date:

2018

HQ Location:

Schiedam, The Netherlands

Total Funding Raised:

$

Company Size:

(

51-200

)

Employee Growth (Last 6 months):

49%

Web Visits Growth (Last 6 months):

316%

Specter Rank

March -

Qmerit, North America's premier provider of electrification solutions, has experienced remarkable growth in residential services, notably in electric vehicle charging and battery storage system installations. With a rapidly expanding network of certified professionals exceeding 23,700, Qmerit is committed to supporting America's transition to electrification by delivering safe, streamlined solutions.

Founded Date:

2015

HQ Location:

Irvine, United States

Total Funding Raised:

$

Company Size:

(

51-200

)

Employee Growth (Last 6 months):

14%

Web Visits Growth (Last 6 months):

19%

Specter Rank

March -

Newcleo, a London-based nuclear technology company founded in 2021, is pioneering compact reactors capable of running on used nuclear fuel, with the aim of changing the low-carbon energy landscape. The company's innovative approach is attracting attention amid a resurgence of interest in nuclear energy as a sustainable solution to climate concerns. With plans to launch its first working product within seven years, Newcleo is leveraging private investment to advance its mission of developing safe, clean, and economically viable nuclear energy solutions.

Founded Date:

2021

HQ Location:

London, United Kingdom

Total Funding Raised:

$

Company Size:

(

201-500

)

Employee Growth (Last 6 months):

44%

Web Visits Growth (Last 6 months):

34%

Specter Rank

March -

Electra, a trailblazing clean iron company, is poised to transform the steel industry with its groundbreaking technology. With a mission to decarbonize and promote sustainability across the steel value chain, Electra's innovative approach promises to revolutionise steel production and drive towards a greener future.

Founded Date:

2020

HQ Location:

Boulder, United States

Total Funding Raised:

$

Company Size:

(

51-200

)

Employee Growth (Last 6 months):

16%

Web Visits Growth (Last 6 months):

32%

Specter Rank

March -

3Sun is gaining momentum in Europe's renewable energy sector with plans to expand its production capacity to 3GW. Backed by significant funding from Italy’s National Recovery and Resilience Plan and the European Investment Bank, 3Sun is playing a crucial role in reshaping the continent's energy landscape.

Founded Date:

2010

HQ Location:

Catania, Italy

Total Funding Raised:

$

Company Size:

(

51-200

)

Employee Growth (Last 6 months):

61%

Web Visits Growth (Last 6 months):

347%

Specter Rank

March -

Last Energy is pioneering small modular nuclear power plants, aiming to meet the growing demand for clean energy, particularly in data centres. Recently, Last Energy showcased a prototype reactor in DC, underscoring its potential to transform energy production. With plans to deploy units in Europe and explore opportunities in the US, Last Energy is poised to demonstrate the viability of nuclear energy, challenging preconceptions and advancing towards a carbon-free future.

Founded Date:

2017

HQ Location:

Washington, United States

Total Funding Raised:

$

Company Size:

(

51-200

)

Employee Growth (Last 6 months):

22%

Web Visits Growth (Last 6 months):

62%

Matrix Renewables recently secured €179 million in financing for a 239MW solar PV portfolio, marking a significant milestone in its renewable energy endeavours. With construction already underway and operations slated to commence in Q1 2025, Matrix Renewables is strengthening its position as a prominent player in the global renewable energy sector.

Founded Date:

2020

HQ Location:

Madrid, Spain

Total Funding Raised:

$

Company Size:

(

51-200

)

Employee Growth (Last 6 months):

13%

Web Visits Growth (Last 6 months):

14%

Specter Rank

March -

Ostrom, a leader in green energy, secured €7.5 million in additional funding in September 2023, led by SE Ventures. With total funding now over €21.5 million, Ostrom focuses on simplifying home electrification and decarbonization. Leveraging this, it plans to expand its product offerings and advance virtual power plant ambitions for grid balancing, resulting in significant customer savings.

Founded Date:

2020

HQ Location:

Berlin, Germany

Total Funding Raised:

$

Company Size:

(

11-50

)

Employee Growth (Last 6 months):

27%

Web Visits Growth (Last 6 months):

108%

xFarm Technologies, a leader in AgTech, recently bolstered its team by partnering with Greenfield Technologies and SpaceSense. With over 4.15 million hectares digitised, 340,000 farms supported, and an array of cutting-edge tools, xFarm is revolutionising sustainable farming practices globally. From precision agriculture to supply chain traceability, xFarm is driving innovation and efficiency across the agri-food sector.

Founded Date:

2017

HQ Location:

Manno, Switzerland

Total Funding Raised:

$

Company Size:

(

51-200

)

Employee Growth (Last 6 months):

20%

Web Visits Growth (Last 6 months):

375%

Specter Rank

March -

INERATEC, a German e-fuel pioneer, recently secured over $129 million in Series B funding led by Piva Capital, with support from key investors. The company's focus is on scaling up production of sustainable e-fuels, aiming to transform 1GW of renewable energy into 125 million gallons of e-fuel by 2030. Their innovative technology offers 'drop-in' e-fuels, providing a renewable alternative for hard-to-abate sectors like aviation and shipping.

Founded Date:

2016

HQ Location:

Karlsruhe, Europe

Total Funding Raised:

$

Company Size:

(

51-200

)

Employee Growth (Last 6 months):

14%

Web Visits Growth (Last 6 months):

87%

Specter Rank

March -

Lyten, known for its low-carbon products, is gaining attention for its lithium-sulphur batteries. With a $200 million Series B funding round led by Prime Movers Labs and supported by brands like Stellantis and Honeywell, Lyten plans to launch EV batteries in 2024 from its new San Jose pilot line. These batteries promise greater energy storage without key minerals found in traditional lithium-ion batteries, potentially revolutionising EVs while reducing environmental impact.

Founded Date:

2015

HQ Location:

Sunnyvale, United States

Total Funding Raised:

$

Company Size:

(

201-500

)

Employee Growth (Last 6 months):

14%

Web Visits Growth (Last 6 months):

126%

The climate technology sector is set for significant growth, with its market size expected to rise from $20.34 billion in 2023 to $182.54 billion by 2033, achieving a compound annual growth rate of 24.5%. This growth is driven by a deeper public understanding of climate change, robust environmental regulations, and advancements in technologies such as renewable energy and carbon capture.

As awareness of environmental challenges and the impacts of climate change intensifies globally, the demand for innovative climate tech solutions is rising. These technologies are essential for reducing greenhouse gas emissions, improving energy efficiency, and fostering sustainable industrial practices. With strong investment and regulatory backing, the climate tech sector is expected to grow significantly, catalysing both environmental sustainability and economic development.

Innovations in the sector include lithium-sulphur batteries for electric vehicles, offering enhanced energy storage without critical minerals. A German company is also expanding production of sustainable e-fuels to convert renewable energy into liquid fuels for sectors like aviation and shipping. Additionally, advancements in digital agriculture are transforming sustainable farming practices worldwide.

We Track More Than 3 Million Companies Monthly

Specter provides real-time insights and emerging trends in the private markets. We equip investment firms and corporations with unparalleled, actionable intelligence on private companies.

After analysing the growth data, here are 12 of the fastest growing climate tech companies covering a range of applications:

Commonwealth Fusion Systems (CFS), a spin-out of MIT, recently achieved a pivotal breakthrough in nuclear fusion technology. With six peer-reviewed papers validating their progress, CFS is on track to bring commercial fusion energy to market. Backed by investors like Bill Gates' Breakthrough Energy, CFS aims to have a commercial power plant operational by the mid-2030s, marking a significant step towards limitless, zero-carbon energy.

Founded Date:

2017

HQ Location:

Cambridge, United States

Total Funding Raised:

$

Employ

(

501-1000

)

Employee Growth (Last 6 months):

18%

Web Visits Growth (Last 6 months):

160%

Battolyser Systems, founded in 2018, is gaining recognition for its innovative Battolyser technology. This integrated battery-electrolyzer system stores electricity and produces green hydrogen, offering flexibility and efficiency to industries. With support from the European Investment Bank (EIB), Battolyser is set to scale its production facility in Rotterdam, contributing to Europe's green transition goals.

Founded Date:

2018

HQ Location:

Schiedam, The Netherlands

Total Funding Raised:

$

Employ

(

51-200

)

Employee Growth (Last 6 months):

49%

Web Visits Growth (Last 6 months):

316%

Specter Rank

March -

Qmerit, North America's premier provider of electrification solutions, has experienced remarkable growth in residential services, notably in electric vehicle charging and battery storage system installations. With a rapidly expanding network of certified professionals exceeding 23,700, Qmerit is committed to supporting America's transition to electrification by delivering safe, streamlined solutions.

Founded Date:

2015

HQ Location:

Irvine, United States

Total Funding Raised:

$

Employ

(

51-200

)

Employee Growth (Last 6 months):

14%

Web Visits Growth (Last 6 months):

19%

Specter Rank

March -

Newcleo, a London-based nuclear technology company founded in 2021, is pioneering compact reactors capable of running on used nuclear fuel, with the aim of changing the low-carbon energy landscape. The company's innovative approach is attracting attention amid a resurgence of interest in nuclear energy as a sustainable solution to climate concerns. With plans to launch its first working product within seven years, Newcleo is leveraging private investment to advance its mission of developing safe, clean, and economically viable nuclear energy solutions.

Founded Date:

2021

HQ Location:

London, United Kingdom

Total Funding Raised:

$

Employ

(

201-500

)

Employee Growth (Last 6 months):

44%

Web Visits Growth (Last 6 months):

34%

Specter Rank

March -

Electra, a trailblazing clean iron company, is poised to transform the steel industry with its groundbreaking technology. With a mission to decarbonize and promote sustainability across the steel value chain, Electra's innovative approach promises to revolutionise steel production and drive towards a greener future.

Founded Date:

2020

HQ Location:

Boulder, United States

Total Funding Raised:

$

Employ

(

51-200

)

Employee Growth (Last 6 months):

16%

Web Visits Growth (Last 6 months):

32%

Specter Rank

March -

3Sun is gaining momentum in Europe's renewable energy sector with plans to expand its production capacity to 3GW. Backed by significant funding from Italy’s National Recovery and Resilience Plan and the European Investment Bank, 3Sun is playing a crucial role in reshaping the continent's energy landscape.

Founded Date:

2010

HQ Location:

Catania, Italy

Total Funding Raised:

$

Employ

(

51-200

)

Employee Growth (Last 6 months):

61%

Web Visits Growth (Last 6 months):

347%

Specter Rank

March -

Last Energy is pioneering small modular nuclear power plants, aiming to meet the growing demand for clean energy, particularly in data centres. Recently, Last Energy showcased a prototype reactor in DC, underscoring its potential to transform energy production. With plans to deploy units in Europe and explore opportunities in the US, Last Energy is poised to demonstrate the viability of nuclear energy, challenging preconceptions and advancing towards a carbon-free future.

Founded Date:

2017

HQ Location:

Washington, United States

Total Funding Raised:

$

Employ

(

51-200

)

Employee Growth (Last 6 months):

22%

Web Visits Growth (Last 6 months):

62%

Matrix Renewables recently secured €179 million in financing for a 239MW solar PV portfolio, marking a significant milestone in its renewable energy endeavours. With construction already underway and operations slated to commence in Q1 2025, Matrix Renewables is strengthening its position as a prominent player in the global renewable energy sector.

Founded Date:

2020

HQ Location:

Madrid, Spain

Total Funding Raised:

$

Employ

(

51-200

)

Employee Growth (Last 6 months):

13%

Web Visits Growth (Last 6 months):

14%

Specter Rank

March -

Ostrom, a leader in green energy, secured €7.5 million in additional funding in September 2023, led by SE Ventures. With total funding now over €21.5 million, Ostrom focuses on simplifying home electrification and decarbonization. Leveraging this, it plans to expand its product offerings and advance virtual power plant ambitions for grid balancing, resulting in significant customer savings.

Founded Date:

2020

HQ Location:

Berlin, Germany

Total Funding Raised:

$

Employ

(

11-50

)

Employee Growth (Last 6 months):

27%

Web Visits Growth (Last 6 months):

108%

xFarm Technologies, a leader in AgTech, recently bolstered its team by partnering with Greenfield Technologies and SpaceSense. With over 4.15 million hectares digitised, 340,000 farms supported, and an array of cutting-edge tools, xFarm is revolutionising sustainable farming practices globally. From precision agriculture to supply chain traceability, xFarm is driving innovation and efficiency across the agri-food sector.

Founded Date:

2017

HQ Location:

Manno, Switzerland

Total Funding Raised:

$

Employ

(

51-200

)

Employee Growth (Last 6 months):

20%

Web Visits Growth (Last 6 months):

375%

Specter Rank

March -

INERATEC, a German e-fuel pioneer, recently secured over $129 million in Series B funding led by Piva Capital, with support from key investors. The company's focus is on scaling up production of sustainable e-fuels, aiming to transform 1GW of renewable energy into 125 million gallons of e-fuel by 2030. Their innovative technology offers 'drop-in' e-fuels, providing a renewable alternative for hard-to-abate sectors like aviation and shipping.

Founded Date:

2016

HQ Location:

Karlsruhe, Europe

Total Funding Raised:

$

Employ

(

51-200

)

Employee Growth (Last 6 months):

14%

Web Visits Growth (Last 6 months):

87%

Specter Rank

March -

Lyten, known for its low-carbon products, is gaining attention for its lithium-sulphur batteries. With a $200 million Series B funding round led by Prime Movers Labs and supported by brands like Stellantis and Honeywell, Lyten plans to launch EV batteries in 2024 from its new San Jose pilot line. These batteries promise greater energy storage without key minerals found in traditional lithium-ion batteries, potentially revolutionising EVs while reducing environmental impact.

Founded Date:

2015

HQ Location:

Sunnyvale, United States

Total Funding Raised:

$

Employ

(

201-500

)

Employee Growth (Last 6 months):

14%

Web Visits Growth (Last 6 months):

126%

The climate technology sector is set for significant growth, with its market size expected to rise from $20.34 billion in 2023 to $182.54 billion by 2033, achieving a compound annual growth rate of 24.5%. This growth is driven by a deeper public understanding of climate change, robust environmental regulations, and advancements in technologies such as renewable energy and carbon capture.

As awareness of environmental challenges and the impacts of climate change intensifies globally, the demand for innovative climate tech solutions is rising. These technologies are essential for reducing greenhouse gas emissions, improving energy efficiency, and fostering sustainable industrial practices. With strong investment and regulatory backing, the climate tech sector is expected to grow significantly, catalysing both environmental sustainability and economic development.

Innovations in the sector include lithium-sulphur batteries for electric vehicles, offering enhanced energy storage without critical minerals. A German company is also expanding production of sustainable e-fuels to convert renewable energy into liquid fuels for sectors like aviation and shipping. Additionally, advancements in digital agriculture are transforming sustainable farming practices worldwide.

We Track More Than 3 Million Companies Monthly

Specter provides real-time insights and emerging trends in the private markets. We equip investment firms and corporations with unparalleled, actionable intelligence on private companies.

After analysing the growth data, here are 12 of the fastest growing climate tech companies covering a range of applications:

Commonwealth Fusion Systems (CFS), a spin-out of MIT, recently achieved a pivotal breakthrough in nuclear fusion technology. With six peer-reviewed papers validating their progress, CFS is on track to bring commercial fusion energy to market. Backed by investors like Bill Gates' Breakthrough Energy, CFS aims to have a commercial power plant operational by the mid-2030s, marking a significant step towards limitless, zero-carbon energy.

Founded Date:

2017

HQ Location:

Cambridge, United States

Total Funding Raised:

$

Company Size:

(

501-1000

)

Employee Growth (Last 6 months):

18%

Web Visits Growth (Last 6 months):

160%

Battolyser Systems, founded in 2018, is gaining recognition for its innovative Battolyser technology. This integrated battery-electrolyzer system stores electricity and produces green hydrogen, offering flexibility and efficiency to industries. With support from the European Investment Bank (EIB), Battolyser is set to scale its production facility in Rotterdam, contributing to Europe's green transition goals.

Founded Date:

2018

HQ Location:

Schiedam, The Netherlands

Total Funding Raised:

$

Company Size:

(

51-200

)

Employee Growth (Last 6 months):

49%

Web Visits Growth (Last 6 months):

316%

Specter Rank

March -

Qmerit, North America's premier provider of electrification solutions, has experienced remarkable growth in residential services, notably in electric vehicle charging and battery storage system installations. With a rapidly expanding network of certified professionals exceeding 23,700, Qmerit is committed to supporting America's transition to electrification by delivering safe, streamlined solutions.

Founded Date:

2015

HQ Location:

Irvine, United States

Total Funding Raised:

$

Company Size:

(

51-200

)

Employee Growth (Last 6 months):

14%

Web Visits Growth (Last 6 months):

19%

Specter Rank

March -

Newcleo, a London-based nuclear technology company founded in 2021, is pioneering compact reactors capable of running on used nuclear fuel, with the aim of changing the low-carbon energy landscape. The company's innovative approach is attracting attention amid a resurgence of interest in nuclear energy as a sustainable solution to climate concerns. With plans to launch its first working product within seven years, Newcleo is leveraging private investment to advance its mission of developing safe, clean, and economically viable nuclear energy solutions.

Founded Date:

2021

HQ Location:

London, United Kingdom

Total Funding Raised:

$

Company Size:

(

201-500

)

Employee Growth (Last 6 months):

44%

Web Visits Growth (Last 6 months):

34%

Specter Rank

March -

Electra, a trailblazing clean iron company, is poised to transform the steel industry with its groundbreaking technology. With a mission to decarbonize and promote sustainability across the steel value chain, Electra's innovative approach promises to revolutionise steel production and drive towards a greener future.

Founded Date:

2020

HQ Location:

Boulder, United States

Total Funding Raised:

$

Company Size:

(

51-200

)

Employee Growth (Last 6 months):

16%

Web Visits Growth (Last 6 months):

32%

Specter Rank

March -

3Sun is gaining momentum in Europe's renewable energy sector with plans to expand its production capacity to 3GW. Backed by significant funding from Italy’s National Recovery and Resilience Plan and the European Investment Bank, 3Sun is playing a crucial role in reshaping the continent's energy landscape.

Founded Date:

2010

HQ Location:

Catania, Italy

Total Funding Raised:

$

Company Size:

(

51-200

)

Employee Growth (Last 6 months):

61%

Web Visits Growth (Last 6 months):

347%

Specter Rank

March -

Last Energy is pioneering small modular nuclear power plants, aiming to meet the growing demand for clean energy, particularly in data centres. Recently, Last Energy showcased a prototype reactor in DC, underscoring its potential to transform energy production. With plans to deploy units in Europe and explore opportunities in the US, Last Energy is poised to demonstrate the viability of nuclear energy, challenging preconceptions and advancing towards a carbon-free future.

Founded Date:

2017

HQ Location:

Washington, United States

Total Funding Raised:

$

Company Size:

(

51-200

)

Employee Growth (Last 6 months):

22%

Web Visits Growth (Last 6 months):

62%

Matrix Renewables recently secured €179 million in financing for a 239MW solar PV portfolio, marking a significant milestone in its renewable energy endeavours. With construction already underway and operations slated to commence in Q1 2025, Matrix Renewables is strengthening its position as a prominent player in the global renewable energy sector.

Founded Date:

2020

HQ Location:

Madrid, Spain

Total Funding Raised:

$

Company Size:

(

51-200

)

Employee Growth (Last 6 months):

13%

Web Visits Growth (Last 6 months):

14%

Specter Rank

March -

Ostrom, a leader in green energy, secured €7.5 million in additional funding in September 2023, led by SE Ventures. With total funding now over €21.5 million, Ostrom focuses on simplifying home electrification and decarbonization. Leveraging this, it plans to expand its product offerings and advance virtual power plant ambitions for grid balancing, resulting in significant customer savings.

Founded Date:

2020

HQ Location:

Berlin, Germany

Total Funding Raised:

$

Company Size:

(

11-50

)

Employee Growth (Last 6 months):

27%

Web Visits Growth (Last 6 months):

108%

xFarm Technologies, a leader in AgTech, recently bolstered its team by partnering with Greenfield Technologies and SpaceSense. With over 4.15 million hectares digitised, 340,000 farms supported, and an array of cutting-edge tools, xFarm is revolutionising sustainable farming practices globally. From precision agriculture to supply chain traceability, xFarm is driving innovation and efficiency across the agri-food sector.

Founded Date:

2017

HQ Location:

Manno, Switzerland

Total Funding Raised:

$

Company Size:

(

51-200

)

Employee Growth (Last 6 months):

20%

Web Visits Growth (Last 6 months):

375%

Specter Rank

March -

INERATEC, a German e-fuel pioneer, recently secured over $129 million in Series B funding led by Piva Capital, with support from key investors. The company's focus is on scaling up production of sustainable e-fuels, aiming to transform 1GW of renewable energy into 125 million gallons of e-fuel by 2030. Their innovative technology offers 'drop-in' e-fuels, providing a renewable alternative for hard-to-abate sectors like aviation and shipping.

Founded Date:

2016

HQ Location:

Karlsruhe, Europe

Total Funding Raised:

$

Company Size:

(

51-200

)

Employee Growth (Last 6 months):

14%

Web Visits Growth (Last 6 months):

87%

Specter Rank

March -

Lyten, known for its low-carbon products, is gaining attention for its lithium-sulphur batteries. With a $200 million Series B funding round led by Prime Movers Labs and supported by brands like Stellantis and Honeywell, Lyten plans to launch EV batteries in 2024 from its new San Jose pilot line. These batteries promise greater energy storage without key minerals found in traditional lithium-ion batteries, potentially revolutionising EVs while reducing environmental impact.

Founded Date:

2015

HQ Location:

Sunnyvale, United States

Total Funding Raised:

$

Company Size:

(

201-500

)

Employee Growth (Last 6 months):

14%

Web Visits Growth (Last 6 months):

126%

The climate technology sector is set for significant growth, with its market size expected to rise from $20.34 billion in 2023 to $182.54 billion by 2033, achieving a compound annual growth rate of 24.5%. This growth is driven by a deeper public understanding of climate change, robust environmental regulations, and advancements in technologies such as renewable energy and carbon capture.

As awareness of environmental challenges and the impacts of climate change intensifies globally, the demand for innovative climate tech solutions is rising. These technologies are essential for reducing greenhouse gas emissions, improving energy efficiency, and fostering sustainable industrial practices. With strong investment and regulatory backing, the climate tech sector is expected to grow significantly, catalysing both environmental sustainability and economic development.

Innovations in the sector include lithium-sulphur batteries for electric vehicles, offering enhanced energy storage without critical minerals. A German company is also expanding production of sustainable e-fuels to convert renewable energy into liquid fuels for sectors like aviation and shipping. Additionally, advancements in digital agriculture are transforming sustainable farming practices worldwide.

We Track More Than 3 Million Companies Monthly

Specter provides real-time insights and emerging trends in the private markets. We equip investment firms and corporations with unparalleled, actionable intelligence on private companies.

After analysing the growth data, here are 12 of the fastest growing climate tech companies covering a range of applications:

Specter Rank

March -

260

Commonwealth Fusion Systems (CFS), a spin-out of MIT, recently achieved a pivotal breakthrough in nuclear fusion technology. With six peer-reviewed papers validating their progress, CFS is on track to bring commercial fusion energy to market. Backed by investors like Bill Gates' Breakthrough Energy, CFS aims to have a commercial power plant operational by the mid-2030s, marking a significant step towards limitless, zero-carbon energy.

Founded Date:

2017

HQ Location:

Cambridge, United States

Total Funding Raised:

$

Company Size:

(

501-1000

)

Employee Growth (Last 6 months):

18%

Web Visits Growth (Last 6 months):

160%

Specter Rank

March -

707

Battolyser Systems, founded in 2018, is gaining recognition for its innovative Battolyser technology. This integrated battery-electrolyzer system stores electricity and produces green hydrogen, offering flexibility and efficiency to industries. With support from the European Investment Bank (EIB), Battolyser is set to scale its production facility in Rotterdam, contributing to Europe's green transition goals.

Founded Date:

2018

HQ Location:

Schiedam, The Netherlands

Total Funding Raised:

$

Company Size:

(

51-200

)

Employee Growth (Last 6 months):

49%

Web Visits Growth (Last 6 months):

316%

Specter Rank

March -

1,159

Qmerit, North America's premier provider of electrification solutions, has experienced remarkable growth in residential services, notably in electric vehicle charging and battery storage system installations. With a rapidly expanding network of certified professionals exceeding 23,700, Qmerit is committed to supporting America's transition to electrification by delivering safe, streamlined solutions.

Founded Date:

2015

HQ Location:

Irvine, United States

Total Funding Raised:

$

Company Size:

(

51-200

)

Employee Growth (Last 6 months):

14%

Web Visits Growth (Last 6 months):

19%

Specter Rank

March -

1,660

Newcleo, a London-based nuclear technology company founded in 2021, is pioneering compact reactors capable of running on used nuclear fuel, with the aim of changing the low-carbon energy landscape. The company's innovative approach is attracting attention amid a resurgence of interest in nuclear energy as a sustainable solution to climate concerns. With plans to launch its first working product within seven years, Newcleo is leveraging private investment to advance its mission of developing safe, clean, and economically viable nuclear energy solutions.

Founded Date:

2021

HQ Location:

London, United Kingdom

Total Funding Raised:

$

Company Size:

(

201-500

)

Employee Growth (Last 6 months):

44%

Web Visits Growth (Last 6 months):

34%

Specter Rank

March -

2,373

Electra, a trailblazing clean iron company, is poised to transform the steel industry with its groundbreaking technology. With a mission to decarbonize and promote sustainability across the steel value chain, Electra's innovative approach promises to revolutionise steel production and drive towards a greener future.

Founded Date:

2020

HQ Location:

Boulder, United States

Total Funding Raised:

$

Company Size:

(

51-200

)

Employee Growth (Last 6 months):

16%

Web Visits Growth (Last 6 months):

32%

Specter Rank

March -

2,555

3Sun is gaining momentum in Europe's renewable energy sector with plans to expand its production capacity to 3GW. Backed by significant funding from Italy’s National Recovery and Resilience Plan and the European Investment Bank, 3Sun is playing a crucial role in reshaping the continent's energy landscape.

Founded Date:

2010

HQ Location:

Catania, Italy

Total Funding Raised:

$

Company Size:

(

51-200

)

Employee Growth (Last 6 months):

61%

Web Visits Growth (Last 6 months):

347%

Specter Rank

March -

4,309

Last Energy is pioneering small modular nuclear power plants, aiming to meet the growing demand for clean energy, particularly in data centres. Recently, Last Energy showcased a prototype reactor in DC, underscoring its potential to transform energy production. With plans to deploy units in Europe and explore opportunities in the US, Last Energy is poised to demonstrate the viability of nuclear energy, challenging preconceptions and advancing towards a carbon-free future.

Founded Date:

2017

HQ Location:

Washington, United States

Total Funding Raised:

$

Company Size:

(

51-200

)

Employee Growth (Last 6 months):

22%

Web Visits Growth (Last 6 months):

62%

Specter Rank

March -

10,891

Matrix Renewables recently secured €179 million in financing for a 239MW solar PV portfolio, marking a significant milestone in its renewable energy endeavours. With construction already underway and operations slated to commence in Q1 2025, Matrix Renewables is strengthening its position as a prominent player in the global renewable energy sector.

Founded Date:

2020

HQ Location:

Madrid, Spain

Total Funding Raised:

$

Company Size:

(

51-200

)

Employee Growth (Last 6 months):

13%

Web Visits Growth (Last 6 months):

14%

Specter Rank

March -

21,215

Ostrom, a leader in green energy, secured €7.5 million in additional funding in September 2023, led by SE Ventures. With total funding now over €21.5 million, Ostrom focuses on simplifying home electrification and decarbonization. Leveraging this, it plans to expand its product offerings and advance virtual power plant ambitions for grid balancing, resulting in significant customer savings.

Founded Date:

2020

HQ Location:

Berlin, Germany

Total Funding Raised:

$

Company Size:

(

11-50

)

Employee Growth (Last 6 months):

27%

Web Visits Growth (Last 6 months):

108%

Specter Rank

March -

34,238

xFarm Technologies, a leader in AgTech, recently bolstered its team by partnering with Greenfield Technologies and SpaceSense. With over 4.15 million hectares digitised, 340,000 farms supported, and an array of cutting-edge tools, xFarm is revolutionising sustainable farming practices globally. From precision agriculture to supply chain traceability, xFarm is driving innovation and efficiency across the agri-food sector.

Founded Date:

2017

HQ Location:

Manno, Switzerland

Total Funding Raised:

$

Company Size:

(

51-200

)

Employee Growth (Last 6 months):

20%

Web Visits Growth (Last 6 months):

375%

Specter Rank

March -

35,933

INERATEC, a German e-fuel pioneer, recently secured over $129 million in Series B funding led by Piva Capital, with support from key investors. The company's focus is on scaling up production of sustainable e-fuels, aiming to transform 1GW of renewable energy into 125 million gallons of e-fuel by 2030. Their innovative technology offers 'drop-in' e-fuels, providing a renewable alternative for hard-to-abate sectors like aviation and shipping.

Founded Date:

2016

HQ Location:

Karlsruhe, Europe

Total Funding Raised:

$

Company Size:

(

51-200

)

Employee Growth (Last 6 months):

14%

Web Visits Growth (Last 6 months):

87%

Specter Rank

March -

59,570

Lyten, known for its low-carbon products, is gaining attention for its lithium-sulphur batteries. With a $200 million Series B funding round led by Prime Movers Labs and supported by brands like Stellantis and Honeywell, Lyten plans to launch EV batteries in 2024 from its new San Jose pilot line. These batteries promise greater energy storage without key minerals found in traditional lithium-ion batteries, potentially revolutionising EVs while reducing environmental impact.

Founded Date:

2015

HQ Location:

Sunnyvale, United States

Total Funding Raised:

$

Company Size:

(

201-500

)

Employee Growth (Last 6 months):

14%

Web Visits Growth (Last 6 months):

126%

Published by

Specter

Specter redefines private market analysis with its unparalleled coverage of data points and growth metrics, ensuring users have access to the most comprehensive and up-to-date insights available. Our platform's strength lies in our proprietary classification and growth-ranking algorithms, which transform billions of data points into actionable intelligence. This enables our users to conduct in-depth analyses, benchmark companies accurately, and discover investment opportunities ahead of the competition. With a steadfast commitment to data accuracy and freshness, Specter is the go-to source for investors and analysts seeking a competitive edge.

Specter redefines private market analysis with its unparalleled coverage of data points and growth metrics, ensuring users have access to the most comprehensive and up-to-date insights available. Our platform's strength lies in our proprietary classification and growth-ranking algorithms, which transform billions of data points into actionable intelligence.

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Specter provides real-time insights and emerging trends in the private markets. We equip investment firms and corporations with unparalleled, actionable intelligence on private companies.

Specter provides real-time insights and emerging trends in the private markets. We equip investment firms and corporations with unparalleled, actionable intelligence on private companies.

Specter provides real-time insights and emerging trends in the private markets. We equip investment firms and corporations with unparalleled, actionable intelligence on private companies.

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