Thermondo
Company Overview
Thermondo GmbH
Berlin, Germany
2012
Over 800 employees (Source: rocketreach.co). Revenue of 25 million USD in 2024 (Source: rocketreach.co).
What They Do
Thermondo is Germany's leading provider of climate-neutral heating systems, specializing in the installation of heat pumps, photovoltaic systems (PV), and solar thermal solutions. The company focuses on digitizing processes from customer acquisition to installation and maintenance to provide an efficient and user-friendly experience (Source: cleanenergywire.org). With over 40,000 customers served by 2023-2024 and a goal of acquiring 7,000 to 11,000 new customers annually, Thermondo plays a significant role in the decarbonization of the housing market (Source: leadiq.com). The company offers comprehensive services, including planning, sales, financing through rental models without upfront payments, assistance with government subsidies, installation, and maintenance, all supported by proprietary software that standardizes and scales these traditionally manual processes (Source: cbinsights.com). Thermondo differentiates itself through its digital approach in a fragmented market, claiming to be the largest planner, seller, financer, and installer of heat pumps in Germany, with annual growth of 60-70% (Source: cleanenergywire.org).
Projects & Track Record
Since its founding, Thermondo has completed between 27,000 and 40,000 heating system modernizations, with approximately 15,000 completed by 2018 and 28,000 by the latest counts (Source: rocketreach.co). Although specific project names, capacities in MW, locations, or costs are not publicly detailed, the number of completed modernizations demonstrates the company's commitment to improving energy efficiency in German households. Ongoing expansions include the installation of heat pumps, which have been scaled nationwide for 16 million German homeowners since June 2022, as well as the introduction of PV system installations in 2023 (Source: leadiq.com). Thermondo has also partnered with major investors such as E.ON and Eneco to strengthen its market position, with its geographical presence focused solely on Germany (Source: cleanenergywire.org).
Recent Developments
In the last two years leading up to 2024-2025, Thermondo has recorded annual growth of 60-70% and expanded its product sales to include PV installations (Source: fev.vc). The company has also begun introducing electricity and storage solutions for its customers in 2023, indicating a strategic diversification beyond its original heat pump offerings (Source: leadiq.com). Despite these successes, no new major contracts, mergers, or funding rounds have been documented beyond the mentioned operational milestones. Previous accolades include 2nd place in the Financial Times' list of the fastest-growing companies in Europe in 2018 and the title of Bloomberg New Energy Pioneer in 2017 (Source: rocketreach.co).
Working There
Thermondo employs over 800 staff, including more than 500 installers, with roles spanning sales, planning, financing, installation, after-sales, software development, and administration (Source: leadiq.com). Hiring occurs through the headquarters in Berlin and regional teams consisting of over 175 qualified professionals, focusing on growth in installation and new PV/heat pump segments (Source: cleanenergywire.org). The company culture emphasizes scaling through proprietary software and customer trust, bolstered by over 40,000 satisfied customers. Thermondo promotes accessible, climate-neutral living through standardized services, even though specific benefits are not comprehensively documented (Source: fev.vc).
Last updated on Feb 23, 2026 | Report an issue
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