. The Texas-based startup is a marketplace for clean technology and services, simplifying shopping for electricity and natural gas rates, plan terms and renewable energy options for the average consumer and small business. As of October 2018 had raised a total of $25.7 million. In 2017, Choose Energy was acquired by Red Ventures.DEPsys
. The Swiss startup provides evolutive solutions enabling traditional low-voltage electricity networks to cope with the new constraints of decentralized production from renewable energy sources. The startup raised €11.6 million in Series B funding in February 2019.Solarkiosk
. The company designs solar-powered technology for rural communities across Africa and Asia, providing access to sustainable energy, refrigeration, water purification, charging, communication, technology, information and business opportunities. As of October 2018, Solarkiosk annual revenue was $4.4 million.Arctic Sand
. This technology significantly improves power conversion efficiency and aims to save 80% of all energy that is lost in the form of heat worldwide. Arctic Sand recently raised a total investment of $28.6 million in two funding rounds.Skeleton Technologies
. Europe's biggest developer and manufacturer of ultracapacitor-based energy storage. Customers include the European Space Agency, which uses the product to recapture the energy and providing peak and backup power. The startup received €46.4 million in six funding rounds.