10 Top Decarbonization Solutions to Watch in 2025

Executive Summary: Which are the Top 10 Decarbonization Solutions to Watch?

1. Turnover Labs (US) – converts impure CO2 waste into carbon-neutral chemicals using cost-efficient, on-site electrolysis.
2. Helix Carbon (US) – builds modular systems that turn captured CO2 into carbon-neutral fuels and chemicals on demand.
3. OMARA (India) – offers a digital MRV platform to track, verify, and validate carbon removal in real time.
4. Volta Hydrogen (UK) – produces low-carbon hydrogen on-site via methane pyrolysis with solid carbon as a by-product.
5. Starstone (Israel) – creates zero-carbon building materials using bio-cement grown from engineered bacteria.
6. Fenix Energy (France) – generates carbon-free heat and power from recyclable iron powder in closed-loop systems.
7. Envo (Denmark) – provides a SaaS platform to optimize decarbonization strategies for real estate portfolios.
8. Entropic (Netherlands) – automates industrial heat decarbonization design using AI-driven modeling and simulations.
9. Path to Zero (Germany) – enables cost-effective decarbonization planning through modular digital decision modeling.
10. Tool Zero (Canada) – offers an AI-powered platform to automate carbon accounting for SMBs using invoice data.

Decarbonization solutions are gaining momentum as governments and industries worldwide commit to net-zero goals and climate-resilient growth.

The global decarbonization market is projected to reach USD 4055 billion by 2030, with continued growth driven by renewable energy deployment, electrification, and carbon capture technologies. This shift is driven by stricter regulations, investor pressure, and the rising cost of carbon emissions.

This report showcases the top decarbonization startups to watch in 2025, featuring innovations that reduce industrial emissions, decarbonize transport and buildings, and speed up the transition to a low-carbon economy.

Global Startup Heat Map highlights Emerging Decarbonization Solutions to Watch

Through the Big Data & Artificial Intelligence (AI)-powered StartUs Insights Discovery Platform, covering over 7M+ startups, 20K+ technology trends plus 150M+ patents, news articles & market reports, we identified 1o decarbonization startups.

The Global Startup Heat Map below highlights emergy decarbonization companies you should watch in 2025, as well as the geo-distribution of 3620+ startups & scaleups we analyzed for this research.

According to our data, we observe high startup activity in the USA and the UK, followed by France. The top 5 Startup Hubs for decarbonization are London, New York City, Singapore, Berlin, and Paris.

Discover Emerging Decarbonization Solutions to Watch in 2025

We hand-picked startups to showcase in this report by filtering for their technology, founding year, location, funding, and other metrics. These emerging decarbonization startups work on solutions ranging from carbon-neutral chemicals and carbon removal monitoring to real estate decarbonization and carbon accounting platforms.

1. Turnover Labs

• Founding Year: 2022
• Location: New York, USA
• Use For: Carbon Neutral Chemical
• Funding: Raised USD 1.4 million in pre-seed funding

Turnover Labs develops an electrolysis process for on-site synthesis of carbon-neutral chemical feeds. The startup’s technology converts impure carbon dioxide waste from manufacturing into various valuable chemicals.

Turnover’s electrodes are resilient and resist natural breakdown, which reduces the maintenance cost of the systems. The reduction in costs enables the production of cheaper products and the deployment of on-site systems.

Moreover, Turnover Labs controls the surface chemistry to prevent impurities from deactivating or competing with the intended reactions. This allows businesses to bypass traditional and expensive purification steps. The solution in this way utilizes emissions coming out of industries that are too contaminated for conventional carbon capture processes.

2. Helix Carbon

• Founding Year: 2024
• Location: Cambridge, MA, US
• Use For: Carbon Dioxide as Feedstock

Helix Carbon decarbonizes industrial chemicals by converting captured CO2 into carbon-neutral fuels and chemicals. The startup creates a drop-in modular, self-contained carbon capture and conversion system. This system provides supply chain resiliency, full circularity, and generates carbon-neutral chemicals and syngas.

In addition, Helix Carbon’s drop-in electrolysis stack enables the production of industrial-grade chemicals on-site without causing any disruptions to operations. This allows chemical producers to decarbonize their supply chain and offers these carbon-neutral products at a price comparable to the existing fossil-based feedstocks.

3. OMARA

• Founding Year: 2025
• Location: New Delhi, India
• Use For: Carbon Removal Monitoring

OMARA provides a digital Monitoring, Reporting, and Verification (MRV) platform. It enables sustainability leaders in enterprises and nature-based solution providers to track and validate carbon removal activities.

The platform collects primary, real-time data on carbon sequestration. This replaces industry averages and estimations with direct, science-backed measurements. It transparently monitors carbon credits. This further ensures that each climate investment is linked to vetted projects and measurable outcomes.

Additionally, OMARA’s platform supports businesses by providing actionable insights, streamlining portfolio management, and connecting buyers with verified global climate projects. This transparent data and carbon credit verification allow organizations to achieve net-zero targets with accountability.

4. Volta Hydrogen

• Founding Year: 2024
• Location: Chester, UK
• Use For: On-site Hydrogen Production

Volta Hydrogen develops an electrically powered reactor system that produces low-carbon hydrogen and high-purity solid carbon directly at industrial user sites. The reactor uses methane pyrolysis to convert natural gas or biomethane from existing supply networks into hydrogen. This eliminates on-site carbon dioxide emissions and enables integration with current heating plants.

The startup’s high-efficiency resistive heating approach further reduces energy consumption compared to traditional methods. The modular and compact design allows rapid deployment without new infrastructure or changes to manufacturing equipment.

The process also generates a stable solid carbon by-product that is stored, sold, or repurposed for industrial applications. This on-demand hydrogen production aligned with real-time industrial needs offers a practical solution for decarbonizing energy-intensive processes.

5. Starstone

• Founding Year: 2023
• Location: Rehovot, Israel
• Use For: Zero-carbon Building Materials

Starstone produces a biogenic cement replacement that uses proprietary bacterial strains and fermentation processes to create reactive calcium carbonate.

The startup’s technology grows these bio-based binding agents in fermentation tanks located at concrete casting facilities. These genetically tailored bacteria, enzymatic components, and upcycled industrial byproducts combine with standard aggregates to form a low-carbon material.

Additionally, Starstone’s process eliminates the need for quarries and energy-intensive kilns and integrates with existing concrete production. It reduces total supply chain emissions while resulting in a material that matches the physical properties of conventional concrete.

The solution also offers flexible scaling to meet demand and achieves cost parity at industrial scale. The on-site production model further minimizes logistical complexity and environmental impact.

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6. Fenix Energy

• Founding Year: 2023
• Location: Lyon, France
• Use For: Green Iron Energy Production

Fenix Energy offers an iron powder energy production system that generates carbon-free heat and electricity for industrial businesses. The process involves the controlled combustion of iron that produces only iron oxide as a byproduct.

Moreover, the startup installs modular units at customer sites, where iron powder is oxidized in a dedicated facility. It releases clean thermal energy without emitting CO2, carbon monoxide, hydrocarbons, or soot.

Credit: Fenix Energy

The spent iron oxide is collected and transported for regeneration using green hydrogen. This enables up to 100 cycles of reuse and establishes a closed-loop, circular fuel supply.

Moreover, Iron’s abundance, non-toxicity, and low explosivity enhance operational safety and supply security. The process achieves a reduction in CO2 emissions compared to fossil fuels and integrates into existing industrial infrastructure. In this way, the recyclable and cost-competitive energy solution allows industries to decarbonize heat and power production.

7. Envo

• Founding Year: 2024
• Location: Copenhagen, Denmark
• Use For: Real Estate Decarbonization

Envo offers a Software as a Service (SaaS) platform that identifies the most cost-efficient decarbonization strategies. This platform is suitable for real estate portfolios utilizing proprietary algorithms and quantitative engineering.

The platform processes high-accuracy building data to evaluate and recommend optimal timing, location, renovation measures, and renewable energy integration for each property.

Envo’s automated optimization engine analyzes over a trillion solutions per asset. This allows businesses to benchmark sustainability metrics, assess stranded risks, and export actionable reports in multiple formats for stakeholders.

Envo integrates with industry tools and external data sources, which streamlines sustainability workflows and facilitates collaborative portfolio management. Envo also allows property owners to lower emissions, mitigate regulatory risks, and enhance asset value.

8. Entropic

• Founding Year: 2024
• Location: Amsterdam, Netherlands
• Use For: Industrial Decarbonization Automation

Entropic develops an artificial intelligence (AI) powered software platform that automates pre-engineering for industrial heat decarbonization projects.

The platform models factory energy systems, simulates low-carbon technologies, and generates detailed business cases. It ingests site-specific data through questionnaires and spreadsheets. Then, it creates a digital model of the facility using virtual flow sensors and thermodynamic analysis to map energy consumption and heat flows.

The startup utilizes a parametric technology library to size and optimize equipment such as heat pumps, heat recovery units, thermal energy storage, and e-boilers under various operational scenarios. It also integrates market conditions like energy prices and subsidies.

In addition, Entropic delivers rapid technical and financial reports, including CAPEX, OPEX, ROI, and scenario modeling. The platform also connects businesses with vetted suppliers through an integrated marketplace for streamlined project development and execution.

Entropic further enables engineering teams to design, evaluate, and implement profitable decarbonization solutions more efficiently.

9. Path to Zero

• Founding Year: 2022
• Location: Karlsruhe, Germany
• Use For: Digital Decarbonization

Path to Zero provides a digital decision-making tool, decide. It supports industrial and commercial companies in planning and managing decarbonization strategies. The platform maps organizational infrastructure into mathematical models and simulates the technical and economic dynamics of emission reduction measures.

The startup’s proprietary mathematical optimization evaluates millions of solution pathways. These identify the most cost-effective combination of technologies and procurement strategies while balancing CAPEX, OPEX, and emissions.

Moreover, Path to Zero features a modular approach with a comprehensive component library that allows tailored modeling of energy efficiency, on-site and off-site energy conversion, procurement, and flexibility options. It also incorporates current market and regulatory data for agile planning. This enables businesses to compare alternative actions and future scenarios instantly.

10. Tool Zero

• Founding Year: 2023
• Location: Kitchener, Canada
• Use For: Carbon Accounting Platform

Tool Zero provides an AI-powered carbon accounting platform that automates greenhouse gas emissions calculation for small and medium-sized businesses by processing invoices and procurement data.

The platform uses proprietary document processing and emissions databases to quantify the carbon footprint associated with purchased parts, products, and services. This eliminates the need for dedicated sustainability teams or costly consultants.

Tool Zero further integrates AI to streamline data ingestion and translates complex supply chain activities into clear emissions metrics. This enables businesses to track Scope 1, 2, and 3 emissions with minimal manual effort.

Additionally, Tool Zero supports businesses in understanding their environmental impact and making informed decisions to reduce emissions. The startup’s solution simplifies compliance with evolving climate regulations and also allows organizations to embed sustainability into their operations.

Discover All Emerging Decarbonization Startups

The energy startups showcased in this report are only a small sample of all startups we identified through our data-driven startup scouting approach. Download our free Decarbonization Innovation Report for a broad overview of the industry or get in touch for quick & exhaustive research on the latest technologies & emerging solutions that will impact your company in 2025!