Independent since 2015
Climate Tech Startups in NYC: 14 Companies to Know (2026)
By Solomon Wiesen, editor. Updated October 2026. Editorial standards | How this site is funded
Fourteen climate tech companies based in New York City, from building retrofits and battery storage to flood insurance and carbon removal, with what each does and how it was funded, checked October 2026.
- Biggest theme: buildings. NYC companies such as BlocPower, Kelvin and Runwise cut emissions from existing buildings.
- Largest equity round: Gotham Greens, $310M Series E (2022).
- Debt matters: half of the biggest recent deals are loans or project finance, not venture rounds.
- Ecosystem: NYCEDC counted 179 climate tech companies in the metro area (2024).
Climate tech startups in New York City
New York’s climate companies look different from the Bay Area’s. Fewer build new energy hardware; more work on the city’s own problem, its million-plus buildings, which produce about two-thirds of NYC’s greenhouse gas emissions and must cut them under Local Law 97. The other strong cluster is climate finance: insurance, carbon markets and project lenders, built on the city’s finance base. NYCEDC counted 179 active climate tech companies in the metro area in 2024.
Latest disclosed financing, NYC climate tech startups
Most recent round or facility for each company, in millions of dollars, log scale. Climate companies lean on debt far more than software startups: half of the largest deals here are loans or project finance.
Buildings and heating
BlocPower
Brooklyn
Replaces oil and gas boilers with heat pumps and electric systems in low-income and multifamily buildings, and finances the work. In March 2023 it raised $154 million: over $24 million of Series B equity from investors including VoLo Earth and Microsoft’s Climate Innovation Fund, plus $130 million of debt from Goldman Sachs. Total funding is over $250 million.
Kelvin (formerly Radiator Labs)
Brooklyn Navy Yard
Makes insulated covers that turn old steam radiators into controllable heaters, and now heat pumps for steam-heated buildings, a very New York problem. It raised a $30 million Series A in May 2023.
Runwise
New York City, founded 2010
Sells heating and cooling controls for multifamily buildings that cut fuel use without replacing the boiler. In June 2025 it raised $55 million: a $30 million Series B led by Menlo Ventures and $25 million of debt from Multiplier Capital.
CarbonQuest
New York City, founded 2019
Installs carbon capture systems on large buildings, capturing CO2 from boiler exhaust for reuse. It raised $20 million in February 2025, led by RiverBend Energy Group.
Power, storage and EV charging
NineDot Energy
Brooklyn (NYU Urban Future Lab)
Develops battery storage sites inside the five boroughs to support the grid at peak hours. Backed by Manulife and Carlyle, it closed a $175 million debt facility from Deutsche Bank in October 2025.
Daylight Energy
Tribeca, founded 2022
Installs home solar and batteries and runs them as a shared energy network. In October 2025 it raised $75 million: $15 million of equity led by Framework Ventures and $60 million of project finance led by Turtle Hill Capital.
Revel
Brooklyn
Started in Brooklyn renting electric mopeds, then ran a rideshare fleet; both have ended, and it now runs fast-charging hubs for electric vehicles. In February 2025 it took a $60 million loan from NY Green Bank to build more charging. Its site says it became part of Voltera, a fleet charging infrastructure company, in June 2026.
itselectric
Brooklyn
Installs curbside EV chargers that draw power from the building next to them, so cities avoid new utility hookups. It raised a $6.5 million seed in July 2024 led by Failup Ventures and Uber, for $11.8 million total.
Voltpost
New York City
Retrofits street lampposts into EV chargers. Its $3.6 million seed in July 2023 was led by RWE Energy Transition Investments.
Climate finance, insurance and carbon
Arbol
New York City
Sells parametric insurance that pays out automatically when weather data crosses a set trigger, such as rainfall or temperature. It raised a $60 million Series B in April 2024, co-led by Giant Ventures and Opera Tech Ventures.
Floodbase
Brooklyn
Builds flood data and parametric flood insurance from satellite monitoring. It raised $5 million in February 2025 led by Ecosystem Integrity Fund, after a $12 million Series A led by Lowercarbon; $17 million total.
Chestnut Carbon
New York City, founded 2022
Plants forests on degraded farmland in the US South and sells the resulting carbon removal credits. Its $160 million Series B in February 2025 included CPP Investments, Cloverlay and DBL; AlleyWatch puts total funding at $360 million.
Relae (formerly Carbon Direct)
New York City, founded 2020
Advises companies on carbon removal, power and decarbonization. It raised $60 million in 2022 and renamed itself Relae in September 2026.
Food and agriculture
Gotham Greens
Started in Brooklyn, founded 2009
Grows lettuce and herbs in city greenhouses, starting on a Greenpoint rooftop, and now sells nationally. Its $310 million Series E in September 2022 was led by BMO Impact Investment Fund and Ares, for $440 million total.
Funding for NYC climate startups
- NY Green Bank lends to clean energy projects that banks will not yet finance, as it did for Revel.
- NYSERDA runs incubators and grant programs; it reports 374 companies supported statewide with over $1.8 billion of private investment raised since 2009.
- NYU Urban Future Lab and the Newlab hub at the Brooklyn Navy Yard house many of the companies above.
- NY Ventures (Empire State Development) co-invests in seed to Series B rounds. See how to invest in NYC startups.
Climate companies often need equipment and project debt long before they are profitable. For loans rather than equity, see small business loans in NYC.
Where to go next
All NYC startups
The full list by sector and borough.
Robotics companies in NYC
Hardware and robot software startups.
NYC startups that raised in 2026
Every disclosed round this year.
Frequently asked questions
How many climate tech companies are in New York City?
NYCEDC counted 179 active climate tech companies in the New York metro area in 2024.
What is the largest climate tech startup in NYC?
By disclosed funding, Gotham Greens ($440 million total) and Chestnut Carbon ($360 million total) are the largest on this list. BlocPower has raised over $250 million including debt.
Why do NYC climate startups focus on buildings?
Buildings produce about two-thirds of New York City’s greenhouse gas emissions, and Local Law 97 sets emission caps for large buildings, which creates paying customers for retrofits, controls and carbon capture.
Where are climate startups located in NYC?
Brooklyn hosts the largest group, especially around the Brooklyn Navy Yard, Newlab and NYU’s Urban Future Lab. Others are in Manhattan, including Tribeca.
Want to see what you may qualify for? Send one short request and a funding partner will contact you about options. This is a request for information, not an application, and approval is never guaranteed. We may be paid when you submit a request; see how this site is funded.
General information, not investment advice. Funding figures are as announced by the companies or reported by the press.
