Top Series A Climate tech companies

Companies decarbonising power, transport, agriculture, and industry. Filtered to companies whose latest disclosed round is Series A.

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Built from a search like: “Top Series A Climate tech companies”

Ranked by current headcount across Series A Climate tech companies. Refreshed monthly.

1
Red Ambiental· Santa María, Colinas del Valle 1 Sector, Cooperativa Cuauhtémoc, Cumbres del Valle, Rincón de Santa María, Colinas del Valle 2 Sector, La Escondida, Nuevo León, Mexico
Red AmbientalMisión:Gestionar el Manejo Integral de residuos, ofreciendo Soluciones innovadoras valoradas por clientes y Sociedad. Asegurando el crecimiento rentable del negocio , así como la calidad de vida en el trabajo y el desarrollo del Capital Humano.Visión:Ser la Empresa más confiable para la gestión integral de residuos realizada de manera sustentable y segura, brindado una experiencia de servicio notable. Valores:Pasión por servirCumplimiento de Compromiso Excelencia en la EjecuciónSustentabilidadSeguridadIntegridadTrabajo en EquipoCapital HumanoRentabilidadPolítica de Calidad:Cumplir los compromisos adquiridos con los clientes, brindando una experiencia de servicio notable y fortaleciendo las relaciones comerciales de largo plazo. Política de Seguridad, Higiene y Medio Ambiente:Preservar la integridad física del ser humano y del medio ambiente ante riesgos generados por actos o condiciones inseguras.
- Series A
- 880 employees
- Founded 1997
2
GameChange Energy· Norwalk, Connecticut, United States
At GameChange Energy, we’re building the infrastructure that powers the clean energy future. Through our family of companies, we deliver smart, reliable solutions for utility-scale solar, energy storage, data centers, and other critical power applications around the world. From solar trackers and mounting systems to transformers, eBOS solutions, drone-based inspections, and customized infrastructure, our technologies are designed to help projects perform better, operate reliably, and scale with confidence. We combine engineering expertise with practical innovation to make clean energy more efficient, dependable, and accessible worldwide.
- Series A
- 580 employees
- Founded 2012
3
Musa· São Paulo, State of São Paulo, Brazil
MUSA is a Brazilian-based technology company developing an innovative waste management solution. Our goal is to create an efficient ecosystem between Waste Generators, Transporters and Recyclers, ensuring 100% reuse by leveraging technology. We don’t see waste; we see valuable materials and economic potential. We are committed to transforming the market by building an effective supply chain of reusable materials for products and services. musa.coJoin us!
- Series A
- 365 employees
- Founded 2020
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4
Solar Panda· Kenya
Solar Panda is a social enterprise providing smart, low-cost solar power to communities across Africa, enabling families and small businesses to flourish and grow.Our high-quality solutions provide customers living without electricity access to clean, safe and sustainable solar energy through a unique rent-to-own business model. Customers make a small down payment followed by daily or weekly payments, equivalent to their existing fuel costs, using mobile technology to unlock energy and then they own the unit outright as quickly as 1 year. The Solar Panda system comes with a quality guarantee and includes lamps, mobile phone charging, a radio, a flashlight and a portable lantern. Customers can easily upgrade when they're ready to TV and other appliances as they start building a reliable credit history with Solar Panda.
- Series A
- 359 employees
- Founded 2017
5
WeVOIS Labs Pvt. Ltd.· Shyam Nagar (Jaipur), Rajasthan, India
WeVOIS Labs Pvt. Ltd. is a technology-driven waste management and sanitation innovation company headquartered in Jaipur, Rajasthan. We work at the intersection of technology, sustainability, and civic infrastructure to transform how India manages its urban waste.Our solutions empower Urban Local Bodies (ULBs), municipalities, and corporate partners to build cleaner, smarter, and more efficient cities — fully aligned with India's Swachh Bharat Mission.What We Do:▸ Tech-enabled solid waste management for urban bodies▸ Sanitation worker welfare & tracking platforms▸ Smart city sanitation infrastructure consulting▸ CSR & government partnership programs▸ Data-driven SBM-U compliance reportingWho We Work With:▸ Nagar Nigam / Nagar Parishad / Nagar Palika▸ State & Central Government departments▸ Corporate CSR divisions▸ NGOs and social impact organizationsDriven by the mission to make India's cities cleaner, greener, and more dignified — WeVOIS Labs is building the future of waste management, one city at a time.📍 Jaipur, Rajasthan | 🌐 www.wevois.com
- Series A
- 259 employees
- Founded 2012

6
GDI· Rochester, New York, United States
Advancing the world's transition to an all electric sustainable future. GDI develops and manufactures next generation 100% silicon battery anodes in a scalable and cost-effective process that unlocks superior battery performance over standard lithium-ion batteries.
- Series A
- 210 employees
- Founded 2009
7
Hello Watt· Paris, Paris 18, Île-de-France, France
Chez Hello Watt, nous avons une conviction : la transition énergétique doit être simple et accessible à tous.💡 Notre mission ? Aider les particuliers à reprendre le contrôle sur leur consommation pour réduire durablement leurs factures d’énergie, tout en accélérant la décarbonation et l’électrification de leur logement. ⚡️Comment ? ➡️ L’application Hello Watt, pour suivre et optimiser sa consommation d’électricité et de gaz. ➡️ Des installations clé en main, partout en France : panneaux solaires, batteries, pompes à chaleur et bornes de recharge, pilotables dans l'application Hello Watt pour maximiser vos économies.Portée par une équipe de plus de 250 personnes passionnées, Hello Watt rend l'énergie plus simple, plus accessible et plus intelligente, en France comme en Europe.Plus de 2 millions de personnes ont déjà téléchargé l’application, et vous ?
- Series A
- 205 employees
- Founded 2017
8
Quatt· Amsterdam, North Holland, Netherlands
Quatt is a Dutch company on a mission to accelerate the transition to sustainable home energy for everyone. We believe every household should have access to affordable energy solutions that provide greater comfort and deeper insight into energy consumption.To achieve this, we develop, produce, and install smart energy products, such as heat pumps and home batteries. While each product is powerful on its own, they work even better together. This forms the Quatt ecosystem: a complete, integrated solution for sustainable home energy.We continuously refine our solutions through smart software, data analysis, and user feedback to make sustainable heating easier and more efficient. In doing so, we’re not just building smart home energy solutions, but ultimately a better future.
- Series A
- 204 employees
- Founded 2021
9
44.01· London, England, United Kingdom
We eliminate CO2 by turning it into rock using the natural power of mineralisation.
- Series A
- 177 employees
- Founded 2020
10
REDEX· Ayer Rajah Crescent, Singapore
REDEX is a premier provider of sustainable energy solutions. Our mission is to drive the global transition to net zero by offering innovative technologies and expert services. With our core products REHash, REConnect and RESuite, we are dedicated to reducing Scope 2 greenhouse gas emissions and creating a greener future for generations to come.
- Series A
- 154 employees
- Founded 2018

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Find engineers and founders at Series A Climate tech companies

Series A Climate tech companies are some of the most active hirers in the market. The list above ranks the largest Climate tech companies whose latest disclosed round is Series A, by current headcount, drawn from public LinkedIn and Crunchbase records. Across 195 matching companies, you’ll find senior engineers, founding designers, and operators worth tracking.

Companies at this stage in Climate tech share a profile: a working product, fresh capital, and a hiring plan that wants senior people yesterday. Looking at headcount, last round, and HQ side by side gives you a quick read on where Climate tech talent is concentrating right now.

Refolk converts this list into a search. Ask for “Series A Climate tech founders hiring senior engineers” or “design leads at Series A Climate tech companies” and Refolk returns a fresh ranked shortlist with the sources behind each match.

How this list is built

Refolk pulled Climate tech companies whose latest disclosed funding round is Series A from public LinkedIn and Crunchbase records, ranked them by current employee count, and kept those with at least 5 employees. The list refreshes monthly.

Last refreshed: Fri, 16 Oct 2026 19:07:20 GMT

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How is this ranking built?

The list draws on the public company graph - headcount and growth signals, funding history, and recency. The criteria chips at the top show exactly which filters produced it, and the methodology section explains the ranking.

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The underlying index updates continuously and this ranking is rebuilt monthly. Last refreshed: Fri, 16 Oct 2026 19:07:20 GMT. For a list built against the index as it stands today, sign up and run the search live.

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