Thirdsphere
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Third Sphere is an early-stage venture capital firm that invests capital to upgrade systems in underserved sectors such as infrastructure and supply chains, with a focus on climate and broader societal responsibility. It partners with climatech founders and works alongside corporate venture investors.
Also known as Third Sphere
Investors · 2
Company profile
researched Aug 2026Third Sphere is an early-stage venture capital firm that deploys capital to upgrade systems in sectors it views as functioning poorly for people, businesses and the general public, ranging from infrastructure to supply chains. Its stated investment scope spans affordable and clean energy, sustainable cities and communities, industry, innovation and infrastructure, clean water and sanitation, responsible consumption and production, connected transportation and logistics, climate action, and systems evolution, reflecting a thesis that addressing climate goes beyond reducing carbon emissions.
The firm positions itself as a network builder as well as a capital provider, connecting founders to resources and to one another. It publishes a newsletter and other resources for founders, including material on corporate venture capital and an approach it calls Speedstrapping, framed around the idea that a Series A is no longer the default path for early-stage companies.
Business model
Third Sphere invests early-stage capital in startups and supports its portfolio with network access and founder-facing resources.
Latest developments
Third Sphere published research based on interviews with 30 corporate venture capital investors and operators across technology, utilities, industrial companies and insurers, examining how corporate venture teams underwrite risk and deploy capital, and promotes an approach it calls Speedstrapping as an alternative to the traditional Series A path.
▸Full profile — market position, go-to-market
Market position
An early-stage climate and impact-oriented venture investor that also works alongside corporate venture capital investors active in climatech.
Third Sphere frames its focus around reshaping underserved and broken global systems rather than carbon reduction alone, and emphasizes connecting founders to each other and to corporate venture partners.
Go-to-market
The firm reaches founders through its website, a newsletter and published research and resources, and maintains a job board advertising more than 500 open roles across its portfolio companies.
Early-stage climatech and systems-focused founders building in sectors such as energy, infrastructure, water, transportation and logistics, and supply chains.
Compiled by commissioned research from 1 cited public sources — announcements, filings, and press listed under research sources below.
Key figures
latest reportedCompany-reported or press-reported figures, each dated to when it was claimed — not independently audited.
▸Research sources · 1
primary sources listed
- Thirdspherethirdsphere.com · web
1 public sources were cited for this profile; the first-party ones are listed here.
Frequently asked questions
- What does Thirdsphere do?
- Third Sphere is an early-stage venture capital firm backing climate and infrastructure founders working to upgrade broken systems.
- Who are Thirdsphere's investors?
- Thirdsphere's investors include Atento Capital, Bleu Capital.