120Water is the end-to-end lead management solution designed to ease the compliance burden and optimize the efforts of water systems. Comprised of software, consultative services, and sampling kits, 120Water’s solution meets systems where they are, providing a roadmap for lead compliance and program success. Their team of water alumni and technology experts have supported over 7,000 sampling events across the country, partnering with water systems and facilities of all sizes to protect public health and provide clean drinking water to communities.

2S Water has developed a sensor to detect metals in water in real time. The current solution is grab samples which are sent to the lab, a time-delayed and error-prone process. 2S Water believes we can do better. Real-time information is essential for process optimization, regulatory compliance, and early issue identification. Our first target market is mining, an industry plagued by regulatory fines and water quality issues, and ripe for data-driven process optimization. Most of these issues focus around metals and atomic contaminants that, up until now, no one could detect in real time. 2S Water's sensor provides real-time data in a fully automated system that provides the instant feedback that facility operators need. Further applications include petrochemicals, forestry, and municipalities. 2S Water wants to make the world’s water safe and understood. With real-time data, we can protect water, protect the environment, and protect facilities.

4.01 is a company that specializes in eliminating CO2 from the atmosphere by mineralizing it in peridotite, a type of rock that naturally absorbs CO2. We eliminate CO2 by turning it into rock and removing it from the atmosphere safely, efficiently, and permanently.

75F is a building intelligence company that makes smart building automation affordable and easy to deploy. 75F leverages IoT, Cloud Computing, and Machine Learning for data-driven, proactive building intelligence and controls for HVAC, lighting, and energy optimization. 75F's mission is to improve occupant productivity through enhanced comfort and indoor air quality – while saving energy and the environment.

Aclarity is a VC-backed cleantech startup developing and selling water treatment systems to clean the world's water and wastewater.

Aclima is pioneering an entirely new way to diagnose the health of our air and track climate-changing pollution. Powered by our network of roving and stationary sensors, aclima measures air pollution and greenhouse gases at unprecedented scales and block-by-block resolution. Our professional analytics software, aclima pro, translates billions of scientific measurements into environmental intelligence for governments, companies, and communities. Our free app, air.health, maps address-level air and climate insights for the communities we serve. Aclima is a purpose-driven technology company catalyzing bold climate action that protects public health, reduces emissions, and delivers clean air for all. We're backed by top-tier investors, including social capital, kapor capital and microsoft climate innovation fund.

Actionfigure is the leading global provider of transportation intelligence solutions, unlocking the value of location and enabling people to make great transportation choices. Actionfigure works with workplaces, and owners and operators of commercial and multifamily real estate to support employees, tenants, residents, and guests with live transportation intelligence. Our products include industry-pioneering screens, applications, and custom integrations to provide the best-fit solutions for our partners. Actionfigure’s platform curates more than 3,000 data feeds to provide accurate, real-time information about public, private, and shared transportation options. Our proprietary AI algorithms provide best-fit transportation and multimodal trip recommendations, and our software provides unique, actionable insights on transportation and real estate. Actionfigure unlocks the value of location in ways not available anywhere else.

Activate empowers entrepreneurial scientists and engineers to transform their research into world-changing products and businesses. By supporting scientists from the very beginning of their entrepreneurial endeavors, they often find us to be the decisive factor in enabling them to either successfully scale their ideas or prevent them from ever taking off. These scientists will introduce innovative products to the market that revolutionize the way they generate energy, manufacture goods, operate our buildings, facilitate global transportation, and utilize resources to sustain their society.

Active Surfaces is commercializing MIT-developed ultra-thin-film solar technology. The company seeks to revolutionize the conventional energy sector by making solar power widespread and seamlessly integrating it into everyday materials. Its innovative manufacturing approach significantly reduces production expenses, presenting a transformational opportunity for semiconductor and electronics manufacturing.

Advanced Energy Economy is an association of businesses working to make energy secure, clean, and affordable. It engages in policy advocacy at the federal, state, and regulatory levels, transforming public policy to enable rapid growth of advanced energy companies. The association encompasses a broad range of products and services that constitute the best available technologies for meeting energy needs. Among these are energy efficiency, demand response, natural gas electric generation, solar, wind, hydro, nuclear, electric vehicles, biofuels, and smart grids. Advanced Energy Economy was founded by Hemant Taneja in 2011.

Aepnus Technology Company provides electrified chemicals for a carbon-free future.

Aeroseal is a creator of duct sealing technology aimed at lowering building carbon emissions. By sealing all the gaps in the building envelope, air ducts, and vents using the company's non-toxic, water-based compound, consumers can improve the comfort and health of their homes and workplaces while also helping to maintain a cleaner environment.