Third Sphere
Third Sphere is a venture capital firm based in New York, United States. This profile covers what Third Sphere invests in, its typical stage and check size, and how founders can get in front of it in 2026.
Early-stage fund focused on rapid, scalable climate action and targeting outsized impact and outsized returns.
- Investment focus
- Climate & EnergyPropTech & Real EstateGovTech & Defense
- Location
- New York, United States
- Founded
- 2013
- Team size
- 11-50
- Investments
- 10
- Typical round
- $4.4M
How to pitch Third Sphere
The founders who hear back from Third Sphere lead with traction and a clear ask that matches its stage, not a generic mass email. Build a targeted, verified list, write a personalized note, and track who opens it, all in one place.
Frequently Asked Questions
What does Third Sphere invest in?
Third Sphere focuses on Climate & Energy, PropTech & Real Estate and GovTech & Defense. Match your sector and stage before reaching out, then find similar active investors on Round Funded.
What is Third Sphere's typical check size?
Third Sphere's typical round is around $4.4M. Use it as a signal for whether your raise fits its stage.
How do I contact Third Sphere?
Unlock Third Sphere's verified email and reach out with a personalized pitch on Round Funded. We show only deliverable contacts, so your outreach does not bounce.
