Top Clean Technology Startups in 2027

Zenero helps consumer brands measure, verify, and communicate environmental impact with credibility. We deliver product-level Life Cycle Assessments (LCAs), power Digital Product Passports (DPPs), and provide compliance-ready carbon labels at scale. The standard for carbon labelling, built for sustainable brands and conscious consumers.

ASPL Fusion (Agnira Sanlayan Pvt. Ltd.) is building India's first commercial neutron technology platform. Starting with BNCT cancer therapy and medical isotope production, our technology trajectory leads to clean fusion energy. Our platform addresses three massive markets: 1. Cancer Therapy (BNCT): Building India's first Boron Neutron Capture Therapy centre — a targeted radiation treatment that kills tumour cells while sparing healthy tissue. 30+ million cancer patients could benefit globally. 2. Medical Isotopes: India imports 100% of its diagnostic and therapeutic isotopes. We are building domestic production capability for Tc-99m, Lu-177, Cu-64, and 7 other critical isotopes using our Gas-Dynamic Trap fusion device. 3. Clean Energy: Our fusion technology trajectory, built on revenue-generating medical applications, leads to commercial fusion power by 2038-2040. Founded by Prof. Prabhat Ranjan (former Director, Institute for Plasma Research — India's national fusion lab) and a team of nuclear scientists and engineers. Key facts: - DPIIT startup recognition: DIPP222699 - Pragmatic four-phase development strategy generating revenue from Rung 0 - World-class advisory board including Prof. Y.C. Saxena (former Head, FCIPT/IPR) - Deep partnerships with IPR, BARC, and IREL for technology and regulatory access - Accelerator-based neutron source (2.5 MeV proton beam on Li-7 target) - Proprietary simulation IP validated against IPR experimental neutron data We are not waiting for fusion to work before generating revenue. Our near-term medical applications (BNCT, isotopes) fund the long-term fusion mission. This is the pragmatic path to fusion energy.

Reunion is the leading platform for clean energy tax credits and compliance. Since 2024, we have worked with major corporations to invest over $7 billion in clean energy projects, including some of the industry's largest tax credit transactions. We are a fast-growing and profitable company, and our expert 25-person team knows how to get things done and loves to move fast! Our founders, Billy Lee and Andy Moon, are second-time entrepreneurs and were early pioneers in solar tax equity and project finance. We have recruited an experienced team of early executives from SunEdison, SolarCity, Tesla, GoodLeap, and other leading clean energy companies. We have built a strong company culture which values collaboration and speed… while still having fun. In 2025, we launched Reunion PWA, a software solution that helps developers comply with prevailing wage and apprenticeship (PWA) requirements to unlock the full value of clean energy tax credits. Reunion PWA is rapidly gaining traction in the market, and we’re growing our team to accelerate adoption and expand to additional compliance offerings. Join us in the fight against climate change by helping renewable energy developers build faster!

A cross-border venture applying Autonomous Driving and AI to revolutionize global logistics and retail.