# Top 50 Climate Tech Startups in the United States by Funding (2026)

> The 50 best-funded climate Tech startups in the United States, ranked by total funding raised: $27B combined.

Source: https://millionrounds.com/top-lists/climate-startups-united-states (Millionrounds; every figure on the page links to its filing or article)

- 1 [**Venture Global** Venture Global is a supplier of home, office, and stationery products.](https://millionrounds.com/company/venture-global) Venture Global is a supplier of home, office, and stationery products. *Founded* 2013 Washington, United States **$10B** last round Jun 2026
- 2 [**Commonwealth Fusion Systems**](https://millionrounds.com/company/commonwealth-fusion-systems) *Founded* - United States **$1.9B** last round Jul 2026
- 3 [**SILA**](https://millionrounds.com/company/sila) *Founded* - United States **$1.7B** last round Aug 2026
- 4 [**Redwood Materials** Redwood Materials is an American company based in Carson City, Nevada, focused on creating a sustainable supply chain for lithium-ion batteries.](https://millionrounds.com/company/redwood-materials) Redwood Materials is an American company based in Carson City, Nevada, focused on creating a sustainable supply chain for lithium-ion batteries. *Founded* 2017 Carson City, United States **$1.2B** last round Jan 2026
- 5 [**Fervo Energy** Fervo Energy develops clean energy technology to generate carbon-free energy from geothermal systems.](https://millionrounds.com/company/fervo-energy) Fervo Energy develops clean energy technology to generate carbon-free energy from geothermal systems. *Founded* 2017 Houston, United States **$1.1B** last round Sept 2026
- 6 [**Pacific Fusion** Pacific Fusion was founded in 2023 to deliver commercial fusion energy to power cities, businesses and homes.](https://millionrounds.com/company/pacific-fusion) Pacific Fusion was founded in 2023 to deliver commercial fusion energy to power cities, businesses and homes. *Founded* 1997 Fremont, United States **$900M** last round Nov 2024
- 7 [**Footprint** Footprint is a materials science technology company that designs, develops, and manufactures solutions to replace single-use plastics.](https://millionrounds.com/company/footprint) Footprint is a materials science technology company that designs, develops, and manufactures solutions to replace single-use plastics. *Founded* 2013 Gilbert, United States **$843M** last round May 2024
- 8 [**Radial Power** Radial Power provides distributed energy and sustainability solutions to commercial and industrial real estate asset owners.](https://millionrounds.com/company/radial-power) Radial Power provides distributed energy and sustainability solutions to commercial and industrial real estate asset owners. *Founded* 2022 Houston, United States **$660M** last round Jan 2026
- 9 [**WildFire Energy** Wildfire Energy is an Australian cleantech startup focused on converting residual waste into renewable energy, hydrogen, and sustainable fuels using its proprie](https://millionrounds.com/company/wildfire-energy) Wildfire Energy is an Australian cleantech startup focused on converting residual waste into renewable energy, hydrogen, and sustainable fuels using its proprie *Founded* 2016 Petrie Terrace, United States **$604M** last round Jul 2026
- 10 [**1PointFive** 1PointFive is a multi-solution platform for Carbon Capture, Utilization and Sequestration (CCUS) that provides decarbonization solutions.](https://millionrounds.com/company/1pointfive) 1PointFive is a multi-solution platform for Carbon Capture, Utilization and Sequestration (CCUS) that provides decarbonization solutions. *Founded* 2020 Houston, United States **$500M** last round Sept 2024
- 11 [**Sedron Technologies** Sedron Technologies is a private environmental services company based in Sedro-Woolley, Washington, founded in 2014 as a spinoff from Janicki Industries.](https://millionrounds.com/company/sedron-technologies) Sedron Technologies is a private environmental services company based in Sedro-Woolley, Washington, founded in 2014 as a spinoff from Janicki Industries. *Founded* 2014 Sedro-Woolley, United States **$500M** last round May 2026
- 12 [**Trace Midstream** Trace Midstream focuses on the development of carbon capture and sequestration projects.](https://millionrounds.com/company/trace-midstream) Trace Midstream focuses on the development of carbon capture and sequestration projects. *Founded* 2018 Houston, United States **$400M** last round Sept 2022
- 13 [**Colossal Biosciences** Colossal Biosciences is an American biotechnology and genetic engineering company founded in September 2021, recognized as the world's first dedicated de-extinc](https://millionrounds.com/company/colossal-biosciences) Colossal Biosciences is an American biotechnology and genetic engineering company founded in September 2021, recognized as the world's first dedicated de-extinc *Founded* 2021 Dallas, United States **$380M** last round Feb 2026
- 14 [**Nature's Fynd** Nature's Fynd is a Chicago-based food-tech company that specializes in creating animal-free meat and dairy alternatives.](https://millionrounds.com/company/nature-s-fynd) Nature's Fynd is a Chicago-based food-tech company that specializes in creating animal-free meat and dairy alternatives. *Founded* 2012 Chicago, United States **$350M** last round Jul 2021
- 15 [**Lunar Energy** Lunar Energy is a renewable energy company based in Mountain View, California, founded in 2020.](https://millionrounds.com/company/lunar-energy) Lunar Energy is a renewable energy company based in Mountain View, California, founded in 2020. *Founded* 2020 Mountain View, United States **$334M** last round Feb 2026
- 16 [**GridPoint** GridPoint is a clean technology company based in Reston, Virginia, founded in 2003.](https://millionrounds.com/company/gridpoint) GridPoint is a clean technology company based in Reston, Virginia, founded in 2003. *Founded* 2003 Reston, United States **$331M** last round Jul 2014
- 17 [**Radiant Nuclear**](https://millionrounds.com/company/radiant-nuclear) *Founded* - United States **$300M** last round Dec 2025
- 18 [**Summit Carbon Solutions** Summit Carbon Solutions (SCS) is a U.S.-based decarbonization platform headquartered in Ames, Iowa.](https://millionrounds.com/company/summit-carbon-solutions) Summit Carbon Solutions (SCS) is a U.S.-based decarbonization platform headquartered in Ames, Iowa. *Founded* 2021 Ames, United States **$300M** last round May 2022
- 19 [**Muon Space** Muon Space is an American aerospace startup founded in 2021, based in Mountain View, California.](https://millionrounds.com/company/muon-space) Muon Space is an American aerospace startup founded in 2021, based in Mountain View, California. *Founded* 2021 Mountain View, United States **$295M** last round Aug 2026
- 20 [**HelioVolt** HelioVolt Corporation manufactures thin-film solar modules for commercial rooftop.](https://millionrounds.com/company/heliovolt) HelioVolt Corporation manufactures thin-film solar modules for commercial rooftop. *Founded* 2001 Austin, United States **$253M** last round Aug 2013
- 21 [**Chestnut Carbon** Chestnut Carbon is an environmental engineering company that offers carbon removal and project development services.](https://millionrounds.com/company/chestnut-carbon) Chestnut Carbon is an environmental engineering company that offers carbon removal and project development services. *Founded* 2021 New York, United States **$250M** last round Sept 2025
- 22 [**Heron Power** Heron Power is an energy infrastructure company based in Scotts Valley, California, founded in 2024 by Drew Baglino, a former Tesla executive.](https://millionrounds.com/company/heron-power) Heron Power is an energy infrastructure company based in Scotts Valley, California, founded in 2024 by Drew Baglino, a former Tesla executive. *Founded* 2024 Scotts Valley, United States **$238M** last round Sept 2026
- 23 [**TemperPack** TemperPack manufactures insulated packaging solutions that meet the needs of all industries that ship perishable items.](https://millionrounds.com/company/temperpack) TemperPack manufactures insulated packaging solutions that meet the needs of all industries that ship perishable items. *Founded* 2015 Richmond, United States **$208M** last round Mar 2022
- 24 [**Harvestone Group** Harvestone Group specializes in marketing, supply chain management, production, storing, distributing and trading services.](https://millionrounds.com/company/harvestone-group) Harvestone Group specializes in marketing, supply chain management, production, storing, distributing and trading services. *Founded* 2018 Franklin, United States **$205M** last round Sept 2024
- 25 [**Heirloom**](https://millionrounds.com/company/heirloom) *Founded* - United States **$203M** last round Feb 2025
- 26 [**Turn** Turn is an IT technology development company that offers web development, CRM, and mobile app development services.](https://millionrounds.com/company/turn) Turn is an IT technology development company that offers web development, CRM, and mobile app development services. *Founded* 2016 United States **$172M** last round Sept 2022
- 27 [**Great Lakes ReNEW** Great Lakes ReNEW is a partnership of more than 50 institutions, including universities, technology firms, and government.](https://millionrounds.com/company/great-lakes-renew) Great Lakes ReNEW is a partnership of more than 50 institutions, including universities, technology firms, and government. *Founded* 2016 Chicago, United States **$160M** last round Jan 2024
- 28 [**Furie Operating Alaska** An oil & gas company which plans to install an offshore natural gas production platform in Alaska](https://millionrounds.com/company/furie-operating-alaska) An oil & gas company which plans to install an offshore natural gas production platform in Alaska *Founded* 2013 Anchorage, United States **$160M** last round Jul 2014
- 29 [**AMP Robotics** AMP offers AI-powered waste sorting solutions to automate recovery and reduce labor.](https://millionrounds.com/company/amp-robotics) AMP offers AI-powered waste sorting solutions to automate recovery and reduce labor. *Founded* - United States **$160M** last round Jun 2026
- 30 [**Sentry** Sentry is a developer-first software company that specializes in open-source error tracking and application monitoring.](https://millionrounds.com/company/sentry) Sentry is a developer-first software company that specializes in open-source error tracking and application monitoring. *Founded* 2011 San Francisco, United States **$155M** last round Apr 2024
- 31 [**Skyven Technologies** Skyven Technologies is an energy-as-a-service company with a mission to decarbonize industrial process heat.](https://millionrounds.com/company/skyven-technologies) Skyven Technologies is an energy-as-a-service company with a mission to decarbonize industrial process heat. *Founded* 2013 Farmers Branch, United States **$145M** last round Jan 2026
- 32 [**Standard Nuclear** Standard Nuclear manufactures advanced nuclear fuel for next-generation reactors and high-temperature applications.](https://millionrounds.com/company/standard-nuclear) Standard Nuclear manufactures advanced nuclear fuel for next-generation reactors and high-temperature applications. *Founded* - Oak Ridge, United States **$140M** last round Jan 2026
- 33 [**Rainmaker** Rainmaker is a New York-based crypto and DeFi company that specializes in a mobile-first, account-abstraction wallet.](https://millionrounds.com/company/rainmaker) Rainmaker is a New York-based crypto and DeFi company that specializes in a mobile-first, account-abstraction wallet. *Founded* 2022 New York, United States **$126M** last round Sept 2026
- 34 [**Amogy** Amogy Inc.](https://millionrounds.com/company/amogy) Amogy Inc. *Founded* 2020 New York, United States **$125M** last round Oct 2026
- 35 [**Terra CO2**](https://millionrounds.com/company/terra-co2) *Founded* - United States **$125M** last round Jul 2025
- 36 [**Thea Energy** Thea Energy is a fusion energy startup focused on commercializing scalable and zero-emission power through advanced stellarator technology.](https://millionrounds.com/company/thea-energy) Thea Energy is a fusion energy startup focused on commercializing scalable and zero-emission power through advanced stellarator technology. *Founded* 2022 Kearny, United States **$120M** last round Jul 2026
- 37 [**Twelve** Twelve offers smart payment solutions such as software modules, links, ordering solutions, internet solutions, communication & sponsorship.](https://millionrounds.com/company/twelve) Twelve offers smart payment solutions such as software modules, links, ordering solutions, internet solutions, communication & sponsorship. *Founded* 2007 Utrecht, United States **$117M** last round Sept 2026
- 38 [**Stand** Discrete Safety Jewellery For Peace Of Mind](https://millionrounds.com/company/stand) Discrete Safety Jewellery For Peace Of Mind *Founded* 2019 United States **$105M** last round Oct 2026
- 39 [**Aalo Atomics** Aalo Atomics manufactures and develops nuclear power plants for clean energy production.](https://millionrounds.com/company/aalo-atomics) Aalo Atomics manufactures and develops nuclear power plants for clean energy production. *Founded* 2023 Dickinson, United States **$103M** last round Oct 2025
- 40 [**Upwell Water** Upwell Water LLC is a San Francisco-based specialty finance company focused on creating a sustainable water future.](https://millionrounds.com/company/upwell-water) Upwell Water LLC is a San Francisco-based specialty finance company focused on creating a sustainable water future. *Founded* 2014 San Francisco, United States **$100M** last round Jul 2024
- 41 [**Noble Environmental** Noble Environmental is an environmental service provider offering solid waste management for renewable natural gas.](https://millionrounds.com/company/noble-environmental) Noble Environmental is an environmental service provider offering solid waste management for renewable natural gas. *Founded* 2016 Uniontown, United States **$100M** last round Sept 2025
- 42 [**TurnTide** TurnTide is an anti-spam technology company based in Pennsylvania.](https://millionrounds.com/company/turntide) TurnTide is an anti-spam technology company based in Pennsylvania. *Founded* 2003 United States **$100M** last round Sept 2020
- 43 [**Last Energy** Last Energy is an American company focused on developing next-generation micro-modular nuclear power plants.](https://millionrounds.com/company/last-energy) Last Energy is an American company focused on developing next-generation micro-modular nuclear power plants. *Founded* 2019 Austin, United States **$100M** last round Dec 2025
- 44 [**EnergyX**](https://millionrounds.com/company/energyx) *Founded* - United States **$97M** last round Jan 2025
- 45 [**Project Omega** Project Omega is a nuclear technology startup founded in 2026 and headquartered in Rhode Island.](https://millionrounds.com/company/project-omega) Project Omega is a nuclear technology startup founded in 2026 and headquartered in Rhode Island. *Founded* 2025 Washington, United States **$92M** last round Nov 2026
- 46 [**Terradot** Terradot is a climate technology company founded in 2022 at Stanford University, focused on developing Enhanced Rock Weathering (ERW) solutions to remove carbon](https://millionrounds.com/company/terradot) Terradot is a climate technology company founded in 2022 at Stanford University, focused on developing Enhanced Rock Weathering (ERW) solutions to remove carbon *Founded* 2022 San Francisco, United States **$92M** last round Oct 2026
- 47 [**Mitra Chem** Mitra Chem is an AI-native manufacturer of lithium-ion battery materials, founded in 2021 and headquartered in Mountain View, California.](https://millionrounds.com/company/mitra-chem) Mitra Chem is an AI-native manufacturer of lithium-ion battery materials, founded in 2021 and headquartered in Mountain View, California. *Founded* 2021 Mountain View, United States **$91M** last round Jun 2025
- 48 [**Imperative Global** Imperative Global is an environmental consulting company that provides carbon offset and environmental asset projects.](https://millionrounds.com/company/imperative-global) Imperative Global is an environmental consulting company that provides carbon offset and environmental asset projects. *Founded* - Houston, United States **$91M** last round Apr 2026
- 49 [**Type One Energy** Stellarator technology to transform energy markets with fusion power.](https://millionrounds.com/company/type-one-energy) Stellarator technology to transform energy markets with fusion power. *Founded* 2019 Knoxville, United States **$88M** last round Sept 2026
- 50 [**Circ** Circ® is a textile-to-textile recycling innovator based in Danville, Virginia, founded in 2011.](https://millionrounds.com/company/circ) Circ® is a textile-to-textile recycling innovator based in Danville, Virginia, founded in 2011. *Founded* 2011 Danville, United States **$88M** last round Mar 2023

**Total funding** how the list is ranked

**15 November 2026** updated nightly

**Rounds we track** source: Millionrounds

Companies whose funding rounds we classed in this sector, ranked by the total they have raised in rounds we hold. Nobody pays to be on a list.

## Who backed them?

Open any company for its rounds and investors, or search the investors who back climate Tech startups in the United States in the app, with filters, lists and exports.

[Find their investors](https://millionrounds.com/login?join=1&next=/app/investors)[All top lists](https://millionrounds.com/top-lists)

## More climate tech lists

[See all](https://millionrounds.com/top-lists?t=Climate%20Tech)

[*VG* *S* *CF* **Climate Tech startups that raised in 2026** 195 companies · $20B in 2026](https://millionrounds.com/top-lists/climate-startups-raised-2026)[*RG* *AE* *NR* **Climate Tech startups in the United Kingdom** 111 companies · $3.4B](https://millionrounds.com/top-lists/climate-startups-united-kingdom)[*1* *CB* *SC* **Climate Tech startups founded in 2021** 76 companies · $3.0B](https://millionrounds.com/top-lists/climate-startups-founded-2021)[*RP* *R* *M* **Climate Tech startups founded in 2022** 69 companies · $2.0B](https://millionrounds.com/top-lists/climate-startups-founded-2022)[*MC* *BB* *S* **Climate Tech startups founded in 2019** 66 companies · $2.1B](https://millionrounds.com/top-lists/climate-startups-founded-2019)[*SD* *1* *LE* **Climate Tech startups founded in 2020** 64 companies · $2.7B](https://millionrounds.com/top-lists/climate-startups-founded-2020)[*VG* *S* *CF* **Climate Tech startups in the United States that raised in 2026** 62 companies · $17B in 2026](https://millionrounds.com/top-lists/climate-startups-united-states-raised-2026)[*TM* *HG* *N* **Climate Tech startups founded in 2018** 48 companies · $1.4B](https://millionrounds.com/top-lists/climate-startups-founded-2018)

## More lists for United States

[See all](https://millionrounds.com/top-lists?r=United%20States)

[*O* *A* *X* **Startups in the United States** 42,176 companies · $870B](https://millionrounds.com/top-lists/startups-united-states)[*GV* *V* *RP* **Health startups in the United States** 7,411 companies · $71B](https://millionrounds.com/top-lists/health-startups-united-states)[*O* *A* *X* **AI startups in the United States** 5,656 companies · $718B](https://millionrounds.com/top-lists/ai-startups-united-states)[*V* *RP* *DH* **Healthcare startups in the United States** 4,148 companies · $51B](https://millionrounds.com/top-lists/healthcare-startups-united-states)[*S* *P* *I* **IT Services startups in the United States** 3,482 companies · $27B](https://millionrounds.com/top-lists/it-services-startups-united-states)[*D* *CE* *AD* **Big Data & Analytics startups in the United States** 2,107 companies · $132B](https://millionrounds.com/top-lists/big-data-startups-united-states)[*O* *A* *W* **AI startups in the United States that raised in 2026** 1,648 companies · $431B in 2026](https://millionrounds.com/top-lists/ai-startups-united-states-raised-2026)[*D* *P* *A* **Software startups in the United States** 1,638 companies · $77B](https://millionrounds.com/top-lists/software-startups-united-states)