Third Sphere

General contacts

Investor type

Founded

2022

AUM

Location

New York, New York, United States

Investment Ticket

Investment Stage

Pre-seed Seed Series A

Region of investment

North America

Investor profile last updated: 16 August, 2026

Profile

Third Sphere is a venture capital firm based in Brooklyn, New York, founded in 2022. The firm focuses on early-stage investments, particularly in the climate technology sector. They aim to reshape global systems by connecting innovative founders with the necessary resources. Third Sphere is known for its unique approach called 'Speedstrapping', which emphasizes rapid scaling and impact.

The firm invests in a variety of sectors including ClimateTech, Energy, Transportation, and PropTech. They typically invest in pre-seed, seed, and Series A stages, with check sizes ranging from $200K to $20M. Third Sphere manages several funds, including the Third Sphere Fund IV, which was launched in 2022. The firm primarily invests in the United States.

Notable portfolio companies include Onewheel - electric skateboards, Plentify - smart energy solutions, ChargeLab - EV charging software, Cove - sustainable packaging, and Mark43 - public safety software. These investments reflect Third Sphere's commitment to supporting companies that drive sustainable and impactful change.

Industry

Hardware Transportation Energy PropTech / ConTech Deeptech ClimateTech

Third Sphere Funds

Name	Type	Industry	Stage	Region	Size	AUM	Launch date
Third Sphere Fund IV	Venture Capital (VC)	ClimateTech		North America	$1-5 m	—	January 2022

Contacts

Name

Title

Social Networks

Stonly Baptiste Blue Co-Founder

Co-Founder

s•••@•••

Miela Mayer Investor + Operating Partner

Investor + Operating Partner

m•••@•••

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Investment-team contacts for Third Sphere — including verified work emails and LinkedIn profiles — are available to Private Equity List subscribers.
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Contacts sourced from the firm's website and LinkedIn, re-verified on a rolling cycle. Spot a stale contact, or none at all? Report it — we re-run that firm within 48h and get back to you.

FAQs about Third Sphere

Is Third Sphere a venture capital or private equity firm?

Third Sphere is a venture capital firm. It backs companies at Pre-seed, Seed and Series A.

Where is Third Sphere located?

Third Sphere is located in New York, New York, United States.

When was Third Sphere founded?

Third Sphere was founded in 2022.

What sectors and industries does Third Sphere invest in?

Third Sphere invests in companies and startups in Hardware, Transportation, Energy, PropTech / ConTech, Deeptech, ClimateTech.

What is Third Sphere geographical focus of investments?

Third Sphere invests in companies and startups in North America.

At what stages of companies and startups does Third Sphere typically invest in?

Third Sphere invests in companies and startups at Pre-seed, Seed, Series A.

What are the contacts of Third Sphere?

Third Sphere can be reached through its website thirdsphere.com, its LinkedIn page and its X account. Cold-mailing a general inbox rarely reaches a partner, so Private Equity List also lists the investment-team contacts for Third Sphere — names, roles, verified work emails and LinkedIn profiles — available on a Pro plan from $129/month (see pricing). Contacts are sourced from the firm's website and LinkedIn and re-verified on a rolling cycle. Spot a stale contact, or none at all? Report it — we re-run that firm within 48h and get back to you.

Can I access Third Sphere data via API or MCP?

Yes. Every field on this page — profile, funds, investment criteria, portfolio and investment-team contacts — is available programmatically through the Private Equity List REST API and MCP server, so AI assistants such as Claude and ChatGPT can query Third Sphere directly instead of scraping this page. One subscription covers both the web app and machine access — see API & MCP.

When was the Third Sphere profile last updated?

Private Equity List re-verifies investor profiles on a rolling cycle, pulling from the firm's own website and LinkedIn rather than a one-off import. This profile was last updated on 16 August, 2026. Something out of date here? Report it — we re-run that firm within 48h and get back to you.