Top Series B Climate tech companies

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

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Ranked by current headcount across Series B Climate tech companies. Refreshed daily.

1
Suntech· Jiangsu, China
Founded in 2001, Suntech has supplied over 30GW photovoltaic modules to more than 100 countries. As a leading photovoltaic manufacturing company, we specialized in the research and production of crystalline silicon solar cells and modules, and always dedicated ourselves to the improvement of production technology, and also the R&D technology to ensure the most reliable and highest quality to our customers. We aim to become the most trusted PV company through continuous innovation and excellent management.
- Series B
- 1.8k employees
- Founded 2001
2
Advanced Disposal Services, Inc.· Ponte Vedra Beach, Florida, United States
Advanced Disposal, now part of Waste ManagementWaste Management, based in Houston, Texas, is the leading provider of comprehensive waste management environmental services in North America. Through its subsidiaries, Waste Management provides collection, transfer, disposal services, and recycling and resource recovery. It is also a leading developer, operator and owner of landfill gas-to-energy facilities in the United States. Waste Management’s customers include residential, commercial, industrial, and municipal customers throughout North America. To learn more information about Waste Management, visit www.wm.com.
- Series B
- 892 employees
- Founded 2000
3
Varaha· Gurugram, Haryana, India
Varaha is a leading global climate tech startup that specializes in nature-based solutions, including regenerative agriculture, agroforestry, and biochar projects that promote climate adaptation, biodiversity, water conservation and increased income for smallholder land stewards. Our team has a proven track record of scaling projects and products to millions of smallholder land stewards and is backed by leading global investors who share our vision for sustainable, nature-based solutions. The company's mission is to provide agriculture as a solution to climate change while also helping farmers in increasing their income.If you are interested in becoming a part of this venture then I would love to know your story, why you are interested and your skillset and experience. please contact at careers@varahaag.com
- Series B
- 345 employees
- Founded 2022
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4
5B· Mascot, New South Wales, Australia
At 5B we're developing cutting edge technology that reduces the cost of renewable energy for our customers. We've reengineered the solar supply chain to simplify how projects are delivered, using fewer materials, lightening-fast deployment and streamlined logistics.The result is our flagship technology: a portable, prefabricated solar array. The Maverick unlocks new opportunities across the entire energy market, while reducing project risk for customers.Founded by Chris McGrath and Eden Tehan in 2013, 5B is headquartered in Sydney, NSW. To find out how 5B can deliver your next solar project simpler, faster and smarter, please get in touch at info@5B.co
- Series B
- 249 employees
- Founded 2013
5
Sigenergy· Shanghai, Shanghai, China
Sigenergy is a forward-thinking company focusing on driving innovation in clean energy and leading the world to a greener future. We create next-generation intelligent energy solutions with optimum safety features by integrating the most advanced power electronics, digital, and AI technologies.With global sales and services, Sigenergy is fast growing to empower customers to achieve energy resilience and sustainability. Our strong R&D team, unparalleled in the field, consists of hundreds of top–tier talents from the renewable energy and hi-tech industries with extensive expertise and unbeatable track records. The world is entering a new era of low-carbon economy. Nations are promoting renewable energy with unprecedented determination and effort. Through continuous innovation and development, Sigenergy is devoted to becoming customers’ most trusted partner on this extraordinary journey. Together, we can make a difference and lead a greener life.
- Series B
- 227 employees
- Founded 2022

6
TAS Environmental Services, L.P.· Irving, Texas, United States
TAS Environmental Services, L.P. began as a local provider of emergency response services, and over the years, we have built a strong reputation for customer care, operational excellence, and a steadfast commitment to Environmental, Health, and Safety standards. Our customer-centric culture is at the core of everything we do, as we take pride in maintaining the integrity and trust of our customer relationships.Today, TAS offers four primary lines of business: Waste Management, Industrial Services, Transportation & Container Rental, and Emergency Response. Our “one-call” solution approach allows us to meet the majority of our customers’ environmental needs, which has fueled our growth from a local provider to a super-regional leader with 20+ service locations across the Southeast U.S.We are ready and available 24/7/365 to serve your needs. Feel free to reach out at 888.654.0111
- Series B
- 222 employees
- Founded 2004
7
NEPRA - Let's Recycle· Ahmedabad, Gujarat, India
Based in Ahmedabad, Gujarat, India, Nepra Resource Management Pvt. Ltd. is a waste management and recycling company specializing in the collection, segregation, processing, and recycling of local municipal dry waste, including plastic.At Nepra we see real value in waste. By combining a people-centric approach with technology-driven processes and solid infrastructure, we offer an integrated, efficient, and scalable waste management solution. Our “zero waste to landfill” model connects and supports all stakeholders in the waste management and recycling value chain through a cohesive, collaborative, and inclusive system that aims to help solve India’s waste management problem. As a company, we are focused on our employees and partners and the ways in which we can improve their livelihoods. Find out more at: www.letsrecycle.in
- Series B
- 209 employees
- Founded 2006
8
Agreena· Copenhagen, Capital Region of Denmark, Denmark
Headquartered in Denmark, Agreena is powering the global transition to regenerative agriculture, operating Europe’s leading soil carbon programme. As the first large-scale agricultural cropland project registered under Verra's world-leading Verified Carbon Standard, Agreena partners with thousands of farmers across 4.5 million hectares of arable land in 20 markets.Agreena finances farmers’ transition to sustainable practices, measures and verifies the climate impact with field-level accuracy, and offers climate solutions to corporates to achieve their sustainability goals. Uniquely, Agreena’s holistic solution combines proprietary digital measurement, reporting, and verification (dMRV) capabilities, leveraging AI and satellite imagery to unlock nature-based solutions at scale with ground-level accuracy.
- Series B
- 172 employees
- Founded 2018
9
Nuru· Goma, North Kivu, Democratic Republic of the Congo
Providing 10 million delighted Congolese people with world-class power by December 2030. Nuru, meaning “light” in Swahili, encapsulates Nuru’s vision to amplify the incredible human creativity in Congo by providing millions of delighted people with world-class renewable energy and connectivity services.Nuru deployed Congo’s first commercial solar-based minigrid in 2017 and launched its first MW-scale solar minigrid in Goma in 2020. To date, Nuru has delivered > 4,500 MWh of world-class energy at 99% uptime to 3,000 clients (~22,000 direct end-users) through 4 mini-grids operating in Goma, Beni, Tadu and Faradje totaling 1.69 MW. These results make Nuru DRC’s leader in utility solar-hybrid minigrids.
- Series B
- 171 employees
- Founded 2015
10
TESVOLT AG· Wittenberg, Saxony-Anhalt, Germany
TESVOLT AG is a German provider and system integrator of battery storage systems for commercial, industrial, and utility-scale applications. The company develops its own control software and combines it with certified storage hardware from leading manufacturers to create high-performance complete systems. TESVOLT supports its installation partners as well as municipal utilities throughout the entire project lifecycle – from planning and construction to operation, monitoring, and electricity marketing. Through its subsidiary TESVOLT ENERGY GmbH, storage systems from as little as 50 kW can already participate in energy trading.The corporate group also includes the joint venture TESVOLT OCEAN GmbH, which develops battery storage solutions for maritime applications. TESVOLT was founded in 2014 and has implemented more than 6,000 storage projects worldwide.
- Series B
- 160 employees
- Founded 2014

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Find engineers and founders at Series B Climate tech companies

Series B 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 B, by current headcount, drawn from public LinkedIn and Crunchbase records. Across 103 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 B Climate tech founders hiring senior engineers” or “design leads at Series B 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 B from public LinkedIn and Crunchbase records, ranked them by current employee count, and kept those with at least 5 employees. The list refreshes once a day.

Last refreshed: Wed, 05 Aug 2026 15:18:08 GMT

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