Third Sphere
InvestorActiveThird Sphere is a North American venture fund with less than $100M in AUM that leads investments at pre-seed and seed stages with checks of $250K-1M across adaptation, agriculture, climate tech, energy, manufacturing, transportation, and water. The firm is known for its 'seedstrapping' concept, which emphasizes capital efficiency and helping founders build sustainable businesses without excessive dilution. Third Sphere is a strong fit for capital-efficient climate founders who want a lead investor aligned with lean, milestone-driven growth.
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