68 Best Green Building Startups to Watch in 2025

The Definitive Seedtable Ranking of Green Building Startups

We track 71,000+ companies and rank them dynamically using our Seedtable Score – a score that uses quantitative and qualitative data points to signal the momentum behind a company. We then monitor the list manually leveraging our expertise as founders and investors.

There are 68 start-ups with an aggregate funding of $775.2m. The average funding per company in this subset is $11.4m.

Last update to the database: Feb 18, 2025. See changelog.

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7

Funding Rounds

$13.2m

Money raised

Epic Cleantec is a full-service water technology company providing turnkey wastewater treatment and reuse systems for the built environment.

Location:

Key people:

10

Funding Rounds

$14.4m

Money raised

Carbon capture and storage company founded in 2007 and based in Dartmouth, Nova Scotia, Canada. CarbonCure Technologies Inc. provides carbon dioxide sequestering technology to concrete plants in a system for recycling carbon dioxide waste from industrial emitters and incorporating it into concrete products.

1

Funding Rounds

$2.1m

Money raised

Carbicrete is a Montreal-based manufacturer of low-cost building materials from industrial carbon dioxide emissions.

Key people:

8

Funding Rounds

$28.3m

Money raised

Verdigris is a California-based company developing smart grid and energy management technology aided by artificial intelligence. It was founded by Mark Chung, Thomas Chung, and Jonathan Chu.

1

Funding Rounds

$5.8m

Money raised

Made of Air is a carbon storage company converting captured carbon into biomass and biochar for negative emissions products.

Location:

Key people:

3

Funding Rounds

$43.4m

Money raised

Plant Prefab is a Rialto-based prefabricated home factory dedicated to sustainable construction.

Key people:

3

Funding Rounds

$6.0m

Money raised

Ecomedes is a San Francisco-based company founded in 2016 by Paul Shahriari, Michael Shahriari and Kathleen Egan.

Location:

Key people:

3

Funding Rounds

$85.0m

Money raised

GHGSat is a Montreal-based company developing sensors to monitor industrial emissions.

4

Funding Rounds

$3.3m

Money raised

nanoleaf is a smart lighting products founded in 2012 by Christian Yan, Tom Rodinger and Gimmy Chu.

Location:

Key people:

2

Funding Rounds

$18.0m

Money raised

Sefaira is a London-based software company developing software for energy efficiency and management in buildings.

Location:

Key people:

6

Funding Rounds

$63.2m

Money raised

Kebony is an environmentally friendly wood modification process developer founded in 1997 by Sabine Domayer.

3

Funding Rounds

$50.0m

Money raised

Project Frog is a San Francisco-based developer of component buildings that assemble onsite for architects and builders to create energy efficient buildings.

3

Funding Rounds

$14.9m

Money raised

Platform providing homes and buildings with both electricity and hot water through solar technology.

Location:

Key people:

2

Funding Rounds

$200.0k

Money raised

Apis Cor is the first company to develop a specialized equipment for 3D printing in the construction industry. Their technology is capable of printing wall structures entirely on-site without extra assembly required. Apis Cor develops a number of technologies for concrete 3D printing.

Location:

Key people:

5

Funding Rounds

$21.6m

Money raised

Sparkfund is a Washington, D.C.-based company offering a technology subscription for building managers and their heating, cooling, lighting and resiliency needs.

Location:

Key people:

1

Funding Rounds

Wattvision is a company developing and manufacturing energy consumption sensors that allow clients track their energy usage on their home, business, rental property or other site.

4

Funding Rounds

$11.6m

Money raised

Qarnot computing is an affordable, eco-friendly cloud computing founded in 2010 by Paul Benoit.

Location:

Key people:

1

Funding Rounds

$1.4m

Money raised

FenestraPro is a Dublin-based company founded in 2012 by David Palmer, Simon Whelan and David Palmer.

Location:

Key people:

3

Funding Rounds

$3.2m

Money raised

ZAN Compute is a Santa Clara, California-based company founded in 2014 by Junaith Ahemed Shahabdeen.

4

Funding Rounds

$2.3m

Money raised

Neurio Technology is a Vancouver-based developer of smart home energy monitoring systems.

3

Funding Rounds

$11.1m

Money raised

greenTEG is a Rümlang-based developer of temperature monitoring technology for greater energy efficiency for commercial buildings.

Location:

Key people:

3

Funding Rounds

$5.5m

Money raised

vilisto is an AI-driven solution to energy consumption founded in 2016 by Christian Brase, Christoph Berger and Lasse Stehnken.

Location:

Key people:

2

Funding Rounds

$6.2m

Money raised

ecoLocked is a green concrete manufacturer founded in 2021.

1

Funding Rounds

Smart Locus is a company founded in 2010 by Victor Taylor.

4

Funding Rounds

$44.7m

Money raised

enVerid is a Westwood, Massachusetts-based manufacturer of HVAC control systems increasing energy efficiency for commercial buildings.

Key people:

1

Funding Rounds

$1.8m

Money raised

buildpulse is a company founded in 2013 by Jason Burt.

Key people:

4

Funding Rounds

$438.0k

Money raised

Seeder Energy is a company founded in 2013 by Alex Shoer, Alexandre van 't Westende, Johnny Browaeys and Rebecca Coombs.

Location:

Key people:

4

Funding Rounds

$300.0k

Money raised

Spiio is a California-based company founded in 2015 by Martin Dal.

Location:

Key people:

1

Funding Rounds

$12.0m

Money raised

BrainBox AI is a Montreal-based artificial intelligence supported HVAC management company.

Location:

Key people:

1

Funding Rounds

$374.5k

Money raised

24/7 virtual facility manager to fine tune your smart building, avoiding unexpected downtime and maintenance

Location:

Key people:

1

Funding Rounds

$550.0k

Money raised

Krafthem is a Stockholm, Sweden-based developer of energy management and energy trading systems.

1

Funding Rounds

$14.9m

Money raised

Accsys Technologies is a London-based manufacturer of modified wood products for the construction industry increasing the durability and stability over traditional material.

1

Funding Rounds

BuiltSpace Technologies is a company founded in 2011 by Rick Rolston.

2

Funding Rounds

$567.5k

Money raised

ALINA is an eco-technology for Sustainable Preservation founded in 2005 by Dāvids Štēbelis, Solvita Kostjukova and Ģirts Ozols.

1

Funding Rounds

$130.0m

Money raised

Distributed generation solutions enabling commercial property owners to self-generate electricity on-site.

3

Funding Rounds

$5.5m

Money raised

Modumate is a San Francisco-based company founded in 2017 by Richman Neumann.

2

Funding Rounds

$1.0m

Money raised

Therma-HEXX is a Portsmouth, New Hampshire-based company founded in 2011 by Robert Barmore.

Key people:

1

Funding Rounds

$40.0m

Money raised

ECOR is a San Diego-based company recycling material to develop green and sustainable building materials.

Location:

Key people:

1

Funding Rounds

$1.0m

Money raised

B-Line Analytics is a company founded in 2016 by Aaron Short.

2

Funding Rounds

$7.6m

Money raised

Raven Window is a Denver-based developer of thermochromatic window coatings to reduce strain on mechanical climatic systems in commercial and residential systems and improve energy efficiency.

2

Funding Rounds

$5.0m

Money raised

mPower Technology is an Albuquerque, New Mexico-based company founded in 2015 by Murat Okandan.

Key people:

3

Funding Rounds

$1.6m

Money raised

Smart Office Energy Solutions is an Houston-based company founded in 2010 by Bryan Hassin.

Location:

Key people:

1

Funding Rounds

Unit Solutions is a Las Vegas-based company founded in 2014 by John Haritos.

Location:

Key people:

4

Funding Rounds

$4.5m

Money raised

Banyan Water is an Austin, Texas-based company founded in 2011 by Gillan Taddune.

1

Funding Rounds

$20.0k

Money raised

Company

Key people:

1

Funding Rounds

$2.5m

Money raised

Kite & Lightning is a Seattle-based company founded in 2013 by Ryan Hickner, Jason Hickner and William Hickner.

1

Funding Rounds

$120.0k

Money raised

BuildSim is a Pittsburgh-based company founded in 2017 by Haopeng Wang, Weili Xu and Zheng Zhang.

1

Funding Rounds

$379.0k

Money raised

Rise is a Fredericton-based company founded in 2015 by Matt Daigle.

5

Funding Rounds

$57.3m

Money raised

CalStar Products is a company founded in 2006 by Craig Ratchford.

2

Funding Rounds

$2.1m

Money raised

Phoebus Energy is a Petah Tikva-based provider of energy-saving water heating and cooling solutions for medium to large commercial facilities.

2

Funding Rounds

$1.2m

Money raised

Columbia Green Technologies is a Portland, Oregon-based company founded in 2010 by Vanessa Keitges.

Key people:

1

Funding Rounds

SenZopt Technologies is a Bangalore-based company founded in 2015 by Satya Gupta.

5

Funding Rounds

$4.4m

Money raised

Tapu Sustainable Solutions is a company founded in 2010 by Emre Ersahin.

4

Funding Rounds

$2.3m

Money raised

YWire Technologies is a Montreal-based company founded in 2009 by Omar Tabba.

2

Funding Rounds

Kaiterra is a Crans-Montana-based company founded in 2014 by Wenxiang Ying, Jessica Lam and Liam Bates.

1

Funding Rounds

$1.5m

Money raised

Smarthab is a Birmingham-based company founded in 2017 by Arthur Moore.

Location:

Key people:

1

Funding Rounds

$150.0k

Money raised

SunPump Solar is a Vancouver-based company founded by Norman Keevil.

1

Funding Rounds

Strauss Energy is a Madaraka Estate-based company founded in 1963 by Tony Nyagah.

2

Funding Rounds

$183.3k

Money raised

Breather Ventilation is an Iceland-based company founded in 2010 by Johannes Loftsson.

1

Funding Rounds

Personal Comfort Systems is a San Francisco-based company founded in 2014 by Peter Rumsey.

1

Funding Rounds

$200.0k

Money raised

Madeplast is a Melbourne-based company founded in 2018 by Rafael Gracioso Martins.

1

Funding Rounds

Sage Smart Garden is a Philadelphia-based company founded in 2018 by Trevor Stephens.

1

Funding Rounds

$80.0k

Money raised

Green Office Tool is a Vancouver-based company founded in 2011 by Jennifer Davis.

2

Funding Rounds

$6.2m

Money raised

Energy Recovery Technologies is a Evanston, Illinois-based company founded by Ron Fleckman.

2

Funding Rounds

FLUXUS is a New York City-based company founded in 2013 by Fanyu Lin.

1

Funding Rounds

$100.0k

Money raised

HomeEco is a Walnut Creek, California-based company founded in 2013 by Rich Myers.

1

Funding Rounds

$12.5m

Money raised

Soliana S.r.l. is a San Teodoro, Sardinia-based company founded by Maryna Yatsuk.

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