Union Square Ventures

Presto is a software platform to power magical charging experiences for fleets, mobility providers, and businesses.We believe that access to reliable and affordable charging is the key to unlocking mass electrification and fighting climate change.

Cactos specializes in smart energy storage systems designed to optimize energy usage and ensure reliable power supply. Their systems are installed on client premises, providing backup power during outages and supporting renewable energy integration.

Bolt.Earth is a leading provider of electric vehicle (EV) charging infrastructure solutions in India, operating over 20,000 charging points and focusing on promoting cleaner mobility in emerging markets. The company offers a comprehensive platform that enables users to locate the nearest charging stations conveniently. In addition, Bolt.Earth's technology facilitates over-the-air updates, allowing fleet operators, vehicle owners, and automotive businesses to integrate smart and sustainable services. By developing a robust network and advanced operating systems, Bolt.Earth is committed to enhancing the adoption of electric vehicles and contributing to a greener future.

Radiant is a clean energy startup based in Los Angeles, California, that specializes in the development of portable nuclear microreactors. Founded in 2019, the company aims to provide an alternative to fossil fuels for both military and commercial applications. Its flagship product, the Kaleidos microreactor, is designed to fit within a shipping container, allowing for transportation by air, ship, and road. This innovative microreactor serves as a zero-emissions power source, making it particularly suitable for remote locations and critical applications where traditional diesel generators are typically used.

David Energy is an innovative energy company that optimizes electricity consumption and management via advanced software and hardware solutions. It aims to reduce costs, increase renewable energy adoption, and enhance sustainability through smart energy management.

Molten Industries specializes in developing clean technology aimed at decarbonizing the hydrogen market. Its innovative platform combines methane-splitting and electrolysis technologies, featuring integrated thermal control and modular design for low-emission performance. This enables various industrial sectors to access cleaner hydrogen inputs with reduced environmental impact and scalable deployment.

Zanskar is a geothermal exploration and technology company focused on accelerating the discovery and development of geothermal energy resources. The company utilizes a predictive platform informed by extensive data, which includes subsurface characterization technology and advanced sensing techniques. By integrating artificial intelligence and big data, Zanskar enhances the exploration process and helps clients identify previously unknown geothermal resources, ultimately reducing the risks associated with such endeavors. Through its innovative approach, Zanskar aims to contribute to the advancement of geothermal energy as a sustainable resource.

Anthro Energy is developing advanced battery technologies to address key challenges in energy storage. They focus on creating ruggedized batteries that enhance safety and enable an electrified future.

Transmutex is a Swiss company founded in 2019 that specializes in innovative nuclear technology aimed at significantly reducing existing nuclear waste. The company leverages advanced techniques, including particle accelerators, to transmute long-lived nuclear waste into less harmful materials while simultaneously generating carbon-free energy. This energy can be reintegrated into the power grid or utilized for green hydrogen production. Comprising a diverse team of physicists, computer scientists, and environmentalists, Transmutex is pioneering a new approach to nuclear energy that offers scalable, carbon-free solutions without the typical challenges associated with conventional nuclear power plants.

Ostrom facilitates the transition to renewable energy by making it accessible and inclusive for consumers. It offers a digital platform that enables users to effortlessly switch to, track, and reduce their electricity consumption.

Lydian aims to accelerate the decarbonization of the chemical industry by electrifying the chemical production process. Founded in 2021 by Branko Zugic, Lydian is headquartered in

Leap is a marketplace for Distributed Energy Resources to participate in the energy market. It allows every connected device to help balance the grid, and get paid for it and access wholesale markets through a single API and help build the flexible, renewable grid of the future. Leap aims to make global energy markets accessible to anyone, starting with demand response and expanding into generation and ancillary services. Leap was founded by Thomas Folker and Remco Van Den Elzen.

Noya develops carbon capture technology that enables industrial facilities to remove CO2 from the atmosphere by retrofitting existing equipment. The company adds a non-toxic CO2 absorbing chemical blend to current cooling towers, allowing simultaneous cooling and carbon capture without major mechanical changes to the towers. The captured CO2 is then sold to companies that use it as a raw material, supporting other industries' climate initiatives. Noya's approach is aimed at accelerating the world’s transition toward a carbon-negative economy by providing a modular, retrofit-based solution that tackles emissions from industrial cooling processes.

Ostrom facilitates the transition to renewable energy by making it accessible and inclusive for consumers. It offers a digital platform that enables users to effortlessly switch to, track, and reduce their electricity consumption.

Lithos Carbon is an agricultural carbon removal company focused on developing innovative carbon capture technology for farms. Founded in March 2022 by experienced entrepreneurs and experts in atmospheric geochemistry, the company aims to transform farmland into carbon capture centers, with a goal of removing one billion tons of CO2 from the atmosphere within this decade. Lithos Carbon's technology employs isotope dilution methods and advanced soil models, utilizing mineral weathering techniques that involve spreading basalt on croplands to enhance dissolved inorganic carbon and facilitate long-term storage as ocean carbonates. Their approach not only promotes significant carbon dioxide removal but also enhances crop yields and improves soil conditions. The company's solutions are custom-designed for specific fields and crops, ensuring immediate scalability and empirical effectiveness.

Anthro Energy is developing advanced battery technologies to address key challenges in energy storage. They focus on creating ruggedized batteries that enhance safety and enable an electrified future.

Molten Industries specializes in developing clean technology aimed at decarbonizing the hydrogen market. Its innovative platform combines methane-splitting and electrolysis technologies, featuring integrated thermal control and modular design for low-emission performance. This enables various industrial sectors to access cleaner hydrogen inputs with reduced environmental impact and scalable deployment.

Zanskar is a geothermal exploration and technology company focused on accelerating the discovery and development of geothermal energy resources. The company utilizes a predictive platform informed by extensive data, which includes subsurface characterization technology and advanced sensing techniques. By integrating artificial intelligence and big data, Zanskar enhances the exploration process and helps clients identify previously unknown geothermal resources, ultimately reducing the risks associated with such endeavors. Through its innovative approach, Zanskar aims to contribute to the advancement of geothermal energy as a sustainable resource.

XFuel is a company focused on producing sustainable and net-zero advanced fuels for the road, marine, and aviation sectors. Founded in 2010 and headquartered in Dublin, Ireland, with additional operations in Palma de Mallorca, Spain, XFuel has developed innovative technology for the efficient conversion of biomass waste into low-carbon fuels. This process results in a clean, drop-in fuel that can be utilized by distributors and consumers globally, offering a cost-effective alternative to traditional fossil fuels. XFuel's production methods lead to up to 85% fewer greenhouse gas emissions compared to conventional fuel production, with a clear pathway towards achieving carbon-neutral and carbon-negative fuel solutions.

Toucan is a company focused on creating technology that facilitates large-scale climate action by enhancing the voluntary carbon market. It develops digital infrastructure aimed at improving transparency and integrity within this market, which is essential for directing funds to effective climate impact projects. By pioneering the use of tokenized carbon credits, Toucan aims to incorporate both established and emerging environmental assets onto the blockchain. The company's overarching goal is to establish a regenerative financial system that addresses climate change while promoting sustainable revenue flows to impactful initiatives.

Shift EV is an electric mobility technology startup focused on advancing the adoption of electric vehicles in commercial fleets. The company specializes in the development of electric vehicle batteries and employs proprietary electro-fitting technology to convert conventional vehicles into electric-run models. Shift EV aims to support fleet owners, operators, and financiers by providing critical insights into electric vehicle performance, including operational cost savings, electricity consumption, emissions reduction, available battery range, and mileage. By facilitating the transition to electric-driven fleets, Shift EV contributes to environmental sustainability and the conservation of natural resources, particularly in emerging markets.

Brilliant Planet develops algae-based biomass production to permanently sequester carbon at large scale using open-air pond systems on coastal desert land. The approach grows microalgae without fresh water, leveraging natural processes to sequester carbon while supporting ocean and air health, and it also provides a source of protein to meet rising demand.

David Energy is an innovative energy company that optimizes electricity consumption and management via advanced software and hardware solutions. It aims to reduce costs, increase renewable energy adoption, and enhance sustainability through smart energy management.

Radiant is a clean energy startup based in Los Angeles, California, that specializes in the development of portable nuclear microreactors. Founded in 2019, the company aims to provide an alternative to fossil fuels for both military and commercial applications. Its flagship product, the Kaleidos microreactor, is designed to fit within a shipping container, allowing for transportation by air, ship, and road. This innovative microreactor serves as a zero-emissions power source, making it particularly suitable for remote locations and critical applications where traditional diesel generators are typically used.

Leap is a marketplace for Distributed Energy Resources to participate in the energy market. It allows every connected device to help balance the grid, and get paid for it and access wholesale markets through a single API and help build the flexible, renewable grid of the future. Leap aims to make global energy markets accessible to anyone, starting with demand response and expanding into generation and ancillary services. Leap was founded by Thomas Folker and Remco Van Den Elzen.

Bolt.Earth is a leading provider of electric vehicle (EV) charging infrastructure solutions in India, operating over 20,000 charging points and focusing on promoting cleaner mobility in emerging markets. The company offers a comprehensive platform that enables users to locate the nearest charging stations conveniently. In addition, Bolt.Earth's technology facilitates over-the-air updates, allowing fleet operators, vehicle owners, and automotive businesses to integrate smart and sustainable services. By developing a robust network and advanced operating systems, Bolt.Earth is committed to enhancing the adoption of electric vehicles and contributing to a greener future.

Transmutex is a Swiss company founded in 2019 that specializes in innovative nuclear technology aimed at significantly reducing existing nuclear waste. The company leverages advanced techniques, including particle accelerators, to transmute long-lived nuclear waste into less harmful materials while simultaneously generating carbon-free energy. This energy can be reintegrated into the power grid or utilized for green hydrogen production. Comprising a diverse team of physicists, computer scientists, and environmentalists, Transmutex is pioneering a new approach to nuclear energy that offers scalable, carbon-free solutions without the typical challenges associated with conventional nuclear power plants.

Remora develops carbon capture technology tailored for trains and trucks. Their device extracts at least 80% of a semi-truck's carbon emissions directly from the tailpipe, purifies it, and sells the CO2 to end-users for long-term storage. This generates revenue for fleet operators, enabling reduced emissions and addressing national CO2 shortages.

David Energy is an innovative energy company that optimizes electricity consumption and management via advanced software and hardware solutions. It aims to reduce costs, increase renewable energy adoption, and enhance sustainability through smart energy management.

Leap is a marketplace for Distributed Energy Resources to participate in the energy market. It allows every connected device to help balance the grid, and get paid for it and access wholesale markets through a single API and help build the flexible, renewable grid of the future. Leap aims to make global energy markets accessible to anyone, starting with demand response and expanding into generation and ancillary services. Leap was founded by Thomas Folker and Remco Van Den Elzen.

Wren is a company that develops a web application designed to assist individuals and organizations in achieving carbon neutrality by tracking and offsetting their CO2 emissions. Founded in 2019 and headquartered in San Jose, California, Wren aims to create tools that empower users to take action against climate change. By offering a subscription service, the company not only provides valuable resources for users but also generates funding to support its ongoing initiatives. Wren's approach focuses on building a sustainable business model to effectively address the challenges posed by climate change.

Helium Systems Inc. develops Internet-of-Things (IoT) technology, focusing on sensor devices that monitor environmental factors such as temperature, humidity, barometric pressure, motion, and light. These sensors are utilized in various applications, including facility monitoring and quality control for medical products, energy management, air quality assessment, and refrigeration temperature regulation. The company offers a web and mobile dashboard for users to manage and access sensor data. Additionally, Helium operates a decentralized wireless network that enables low-power IoT devices to connect to the internet. This network incentivizes individuals to become network operators, rewarding them with a cryptocurrency for validating network transactions and contributing to the network's integrity. Incorporated in 2013 and based in San Francisco, Helium Systems continues to innovate within the IoT landscape, enhancing the ability to gather insights from smart devices.

AMEE is dedicated to offering credible environmental data for organizations globally, starting with a focus on 2.7 million entities in the UK. The company aims to enhance decision-making regarding resource usage by providing free access to this data. By fostering an open network, AMEE allows organizations to update, compare, and share their environmental information, promoting transparency and collaboration. This platform not only facilitates better understanding and management of environmental risks but also links these risks to immediate financial pressures, encouraging businesses to adopt more sustainable practices. Through its data-driven approach, AMEE aspires to improve overall efficiency and resilience among organizations while driving innovation and responsible resource management.

AMEE is dedicated to offering credible environmental data for organizations globally, starting with a focus on 2.7 million entities in the UK. The company aims to enhance decision-making regarding resource usage by providing free access to this data. By fostering an open network, AMEE allows organizations to update, compare, and share their environmental information, promoting transparency and collaboration. This platform not only facilitates better understanding and management of environmental risks but also links these risks to immediate financial pressures, encouraging businesses to adopt more sustainable practices. Through its data-driven approach, AMEE aspires to improve overall efficiency and resilience among organizations while driving innovation and responsible resource management.

Mombak is a carbon removal company based in Sao Paulo, Brazil, focused on reforestation of the Amazon. The team brings together experts in science, technology, forestry, and carbon markets to advance large-scale, nature-based climate solutions.

Bolt.Earth is a leading provider of electric vehicle (EV) charging infrastructure solutions in India, operating over 20,000 charging points and focusing on promoting cleaner mobility in emerging markets. The company offers a comprehensive platform that enables users to locate the nearest charging stations conveniently. In addition, Bolt.Earth's technology facilitates over-the-air updates, allowing fleet operators, vehicle owners, and automotive businesses to integrate smart and sustainable services. By developing a robust network and advanced operating systems, Bolt.Earth is committed to enhancing the adoption of electric vehicles and contributing to a greener future.