Third Sphere

Third Sphere provides early-stage capital and financing structures to accelerate hardware-enabled climate startups. It invests primarily at pre-seed and seed, offering equity, credit, and asset-finance structures while using a proprietary Sync platform and AI tools to support fundraising and operational efficiency. The firm operates as a hands-on venture fund that pairs capital with coaching, customer and investor introductions, and operational support to portfolio founders. Third Sphere focuses on electrification, resilience, and hardware-plus-software solutions across energy, food, water, transportation, and other systems and has invested in roughly 100 portfolio companies.