Third Sphere

Third Sphere is a venture capital firm founded in 2013 that invests at the pre-seed and seed stage. Its mandate is climate-focused: capital goes to founders working on infrastructure, supply chains, energy systems and communities, with stated technical domains spanning clean energy, water, transportation, sustainable cities, responsible production and climate action. The firm favours hardware-enabled solutions, frequently paired with software, and frames its portfolio around mitigation, resilience and adaptation rather than carbon emissions alone.

Beyond equity investment, the firm operates three lines of support for portfolio companies. The first is venture investing itself; the second is hands-on founder work, including coaching and introductions to customers and investors; the third is a set of credit resources and tools designed to help founders locate financing and deploy capital more efficiently. Capital efficiency is a recurring emphasis, as is a network approach that connects founders with one another as well as with the firm's contacts.

Sector coverage is broad within the climate thesis: clean energy, water, infrastructure, transportation, urban sustainability and responsible production all sit within scope, across both hardware and software. The stated culture is founder-friendly and mission-driven, oriented toward systemic improvement of environmental and industrial systems.