Third Sphere
Corporate VCPre-SeedβSeed
Investment thesis
Third Sphere backs founders building hardware-enabled climate solutions that deliver better, faster, and cheaper outcomes through techno-economic innovation. The firm focuses on transforming human systems to align with planetary systems while generating financial returns, with particular expertise in resilience and adaptation technologies. The team helps portfolio companies leverage AI and automation to reduce burn, achieve profitability alongside growth, and navigate alternative funding sources beyond traditional venture equity.
Source: firm website, verified Jul 21, 2026.
What they invest in
from 4 of 33 portfolio companiesEnergy Γ2SaaS Γ2AgTech Γ1Climate Tech Γ1Construction Tech Γ1Consumer Γ1Enterprise Software Γ1Fintech Γ1
HQs:United KingdomΓ1
Investments Β· 33 tracked
founders shown can be your intro pathStartups developing new energy sources and innovative ways to store and use energy to ensure universal access to affordable, reliable, and sustainable energy.
BuildStream provides candidate sourcing and data research services for recruiting teams, using multiple data sources and manual verification to compile verified contact lists that reduce reliance on multiple software tools.
Construction TechFintechHR TechPropTechLondon, GB
EarthForce develops software and precision sensing technology to optimize wildfire prevention through fuel treatments at landscape scale. The company serves forestry operators and land managers seeking to reduce fire risk and restore forest health efficiently.
AgTechClimate TechSaaS
Sapient Industries provides advanced energy submetering and monitoring systems for commercial and residential properties, helping facility managers track energy consumption, reduce costs, and achieve decarbonization goals. The company serves enterprise customers, real estate developers, service providers, and energy consultants with integrated hardware and analytics solutions across industries including manufacturing, retail, healthcare, and multi-tenant residential buildings.
EnergyEnterprise SoftwareIoT
Frequently asked questions
- What stage does Third Sphere invest at?
- Third Sphere invests at the Pre-Seed, Seed stages.
- What is Third Sphere's typical check size?
- Third Sphere typically writes checks of $250K β $1M.
- What sectors does Third Sphere focus on?
- Third Sphere focuses on Cleantech, Climate Tech, Sector Agnostic.
- Does Third Sphere lead rounds?
- Yes, Third Sphere leads investment rounds.
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