# Techstars' Cleantech Investments: 37 Startups in Its Portfolio (2026) > The 37 Cleantech startups Techstars has backed, by stage: $598M raised between them. From the rounds we track; updated nightly. Source: https://millionrounds.com/portfolio-maps/techstars-cleantech-portfolio (Millionrounds; every figure on the page links to its filing or article) ## Pre-seed and seed 19 - [Boldr](https://millionrounds.com/company/boldr) - [Rana Energy](https://millionrounds.com/company/rana-energy) - [Carbo](https://millionrounds.com/company/carbo) - [Cariqa](https://millionrounds.com/company/cariqa) - [Kumulus Water](https://millionrounds.com/company/kumulus-water) - [HyWatts](https://millionrounds.com/company/hywatts) - [Hyperion Global Energy](https://millionrounds.com/company/hyperion-global-energy) - [Tether](https://millionrounds.com/company/tether) - [Wiseair](https://millionrounds.com/company/wiseair) - [SplitEV](https://millionrounds.com/company/splitev) - [Raise Green](https://millionrounds.com/company/raise-green) - [CircularPlace](https://millionrounds.com/company/circularplace) - [Sol Clarity](https://millionrounds.com/company/sol-clarity) - [Greena World](https://millionrounds.com/company/greena-world) - [Preflet](https://millionrounds.com/company/preflet) - [Laminar Scientific](https://millionrounds.com/company/laminar-scientific) - [Liquidstar](https://millionrounds.com/company/liquidstar) - [ElectricFish](https://millionrounds.com/company/electricfish) - [Peerby Classic](https://millionrounds.com/company/peerby-classic) ## Stage not reported 7 - [LevelTen Energy](https://millionrounds.com/company/levelten-energy) - [Twelve](https://millionrounds.com/company/twelve) - [*F* FuelSave](https://millionrounds.com/company/fuelsave) - [Seabound](https://millionrounds.com/company/seabound) - [Resilient Power Systems](https://millionrounds.com/company/resilient-power-systems) - [Eolic Wall](https://millionrounds.com/company/eolic-wall) - [Voltaage](https://millionrounds.com/company/voltaage) ## Series A 6 - [WattBuy](https://millionrounds.com/company/wattbuy) - [Hammerhead](https://millionrounds.com/company/hammerhead) - [Conservation Labs](https://millionrounds.com/company/conservation-labs) - [*T* Tenzo](https://millionrounds.com/company/tenzo) - [RatedPower](https://millionrounds.com/company/ratedpower) - [WATTMORE](https://millionrounds.com/company/wattmore) ## Series B 3 - [MAX](https://millionrounds.com/company/max) - [Mast Reforestation](https://millionrounds.com/company/mast-reforestation) - [EcoG](https://millionrounds.com/company/ecog) ## Growth 2 - [Sense](https://millionrounds.com/company/sense) - [SkySpecs](https://millionrounds.com/company/skyspecs) ## Segment by segment ### Pre-seed and seed 19 startups · $40M raised - [**Boldr**](https://millionrounds.com/company/boldr) Boldr Group Inc. United Kingdom $8.1M - [**Rana Energy**](https://millionrounds.com/company/rana-energy) Rana Energy provides sustainable innovative & customer-centric energy solutions for a greener Africa. Nigeria $5.5M - [**Carbo**](https://millionrounds.com/company/carbo) Carbo is a French sustainability and environmental consulting firm focused on helping organizations measure, manage, and reduce th France $5.5M - [**Cariqa**](https://millionrounds.com/company/cariqa) Cariqa is a technology company based in Berlin, founded in 2022, that specializes in electric vehicle (EV) charging solutions. Germany $4.7M - [**Kumulus Water**](https://millionrounds.com/company/kumulus-water) Kumulus Water is a French-Tunisian GreenTech startup founded in 2021, focused on providing sustainable access to clean drinking water. France $3.4M - [**HyWatts**](https://millionrounds.com/company/hywatts) Power‐Plant‐in‐a‐Box for EV, Data Centers | Green Energy Everywhere United States $2.9M - [**Hyperion Global Energy**](https://millionrounds.com/company/hyperion-global-energy) Hyperion Global Energy is a Canadian environmental technology company based in Ottawa, Ontario. Canada $2.0M - [**Tether**](https://millionrounds.com/company/tether) Tether Holdings operates a platform to store, send, and receive local currency person to person globally. Sweden $1.5M ### Stage not reported 7 startups · $251M raised - [**LevelTen Energy**](https://millionrounds.com/company/levelten-energy) LevelTen Energy is a leading provider of renewable transaction infrastructure, based in Seattle, Washington. United States $129M - [**Twelve**](https://millionrounds.com/company/twelve) Twelve offers smart payment solutions such as software modules, links, ordering solutions, internet solutions, communication & sponsorship. United States $117M - [*F* **FuelSave**](https://millionrounds.com/company/fuelsave) FuelSave is a disruptive energy efficiency enhancement company that provides innovative solutions. Germany $1.6M - [**Seabound**](https://millionrounds.com/company/seabound) Seabound is a carbon capture technology company. United Kingdom $1.5M - [**Resilient Power Systems**](https://millionrounds.com/company/resilient-power-systems) Resilient Power Systems provides power converters such as DCFC supercharging stations in a box and renewable H2 energy power converters. United States $1.5M - [**Eolic Wall**](https://millionrounds.com/company/eolic-wall) Eolic Wall is a deep tech, climate tech startup backed by Techstars and Third Derivative, aiming to decentralize access to wind en United States $320K - [**Voltaage**](https://millionrounds.com/company/voltaage) Voltaage is a French-Italian deep-tech startup founded in 2021, with headquarters in Paris and Turin, and an office in Austin, Texas. France $95K ### Series A 6 startups · $48M raised - [**WattBuy**](https://millionrounds.com/company/wattbuy) WattBuy is a clean energy platform that empowers enterprises to help their customers choose affordable, clean energy options for their home. United States $12M - [**Hammerhead**](https://millionrounds.com/company/hammerhead) Hammerhead is a leader in cycling technology, founded in 2013 by Piet Morgan and Laurence Wattrus. United States $11M - [**Conservation Labs**](https://millionrounds.com/company/conservation-labs) Conservation Labs is a Pittsburgh-based company that specializes in AI and smart water technology. United States $9.2M - [*T* **Tenzo**](https://millionrounds.com/company/tenzo) United Kingdom $6.8M - [**RatedPower**](https://millionrounds.com/company/ratedpower) RatedPower software to design & optimize utility-scale solar plants. Spain $6.0M - [**WATTMORE**](https://millionrounds.com/company/wattmore) Clean energy company building control software for energy systems using a combination of batteries, solar, and grid power United States $2.4M ### Series B 3 startups · $119M raised - [**MAX**](https://millionrounds.com/company/max) Nigeria $76M - [**Mast Reforestation**](https://millionrounds.com/company/mast-reforestation) Mast Reforestation is a leading company in North America focused on post-wildfire reforestation and carbon removal. United States $25M - [**EcoG**](https://millionrounds.com/company/ecog) EcoG is a global B2B technology and IP company based in Munich, Germany, specializing in solutions for electric vehicle (EV) fast- Germany $19M ### Growth 2 startups · $140M raised - [**Sense**](https://millionrounds.com/company/sense) Sense specializes in tracking devices and home automation solutions for its customers. United States $108M - [**SkySpecs**](https://millionrounds.com/company/skyspecs) SkySpecs is a leader in renewable energy asset management, focusing on the wind energy sector. United States $32M **How this map is made.** Every startup here works in Cleantech and has raised money in a round we track that names Techstars as an investor. Each sits under the stage of its latest round. Rebuilt nightly; updated 15 November 2026. ## More portfolio maps [All portfolios](https://millionrounds.com/portfolio-maps) [Sector portfolio **Techstars' AI portfolio** 336 startups · $4.9B](https://millionrounds.com/portfolio-maps/techstars-ai-portfolio)[Sector portfolio **Techstars' IT Services portfolio** 145 startups · $515M](https://millionrounds.com/portfolio-maps/techstars-it-services-portfolio)[Sector portfolio **Techstars' Fintech portfolio** 134 startups · $3.9B](https://millionrounds.com/portfolio-maps/techstars-fintech-portfolio)[Sector portfolio **Techstars' Big Data & Analytics portfolio** 102 startups · $871M](https://millionrounds.com/portfolio-maps/techstars-big-data-analytics-portfolio)[Sector portfolio **Techstars' Consumer Apps portfolio** 75 startups · $806M](https://millionrounds.com/portfolio-maps/techstars-consumer-apps-portfolio)[Sector portfolio **Techstars' Healthtech portfolio** 56 startups · $588M](https://millionrounds.com/portfolio-maps/techstars-healthtech-portfolio) ## Raising from investors like Techstars? 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