Asia’s 12 Hottest Climate Tech Bets: From Pilots to Platforms

Asia’s climate tech sector is entering a more grounded phase. In 2025, the region raised $2.79 billion across early-stage rounds, a notable signal of resilience at a time when global venture funding remained constrained. But the more important shift is not the amount of capital—it is where that capital is going. Funding is no longer chasing broad climate narratives. It is moving toward technologies that can demonstrate deployment, efficiency, and measurable impact. 

This is particularly visible in India, where climate startups are increasingly using the domestic market as a proving ground.

“Interestingly, in recent years India has emerged as a strong market for climate solutions, largely because many of these technologies are already approaching cost parity. There is also a growing concentration of resources and ecosystem support. As a result, startups are increasingly using India as their home ground to refine product formulations and bring costs down by achieving economies of scale,” Bharti Singhla, venture partner at Momentum Capital told AsiaTechDaily in an interview.

At the same time, a broader regional pattern is taking shape. Japan and Singapore are driving precision engineering and advanced R&D, Southeast Asia is emerging as a deployment and distribution layer, and India is anchoring cost-efficient validation at scale. The result is a more coordinated ecosystem, where technologies are not just developed in isolation, but tested, refined, and expanded across markets with complementary strengths.

Against this backdrop, the following 12 deals offer a snapshot of where capital is flowing—and how Asia’s climate tech sector is evolving from early experimentation toward commercial execution.

1. Tan90 Thermal (India, $2.3M Series A)

Tan90 Thermal is building portable cold storage systems powered by phase-change materials (PCM), often referred to as “cold batteries.” These systems store thermal energy and release it over time, enabling refrigeration without continuous electricity—critical in regions with unreliable power.

The company’s technology directly targets cold chain inefficiencies in food and pharma logistics, where losses are significant across India and Southeast Asia. By reducing dependence on diesel-powered refrigeration, Tan90 claims up to 50% emissions reduction in last-mile cooling. The Series A funding from NABVENTURES and Blue Ashva is being used to scale deployments and expand into Southeast Asian markets.

Why it matters:
Cold chain is one of the largest hidden emission sources in emerging markets. Solving it unlocks both food security and decarbonization.

What to watch:

• Cost competitiveness vs diesel refrigeration
• Scale of deployments in Southeast Asia
• Adoption in pharma supply chains (higher margin use case)

2. Alt Carbon (India, $12M Seed)

Alt Carbon is focused on enhanced rock weathering (ERW), a carbon removal method that accelerates natural geological processes to permanently lock away CO₂. The startup is running 10 kiloton-scale pilot deployments, placing it among the more advanced ERW players in Asia.

A key differentiator is its early investment in basalt supply chain control, which is critical for scaling ERW economically. Backed by Lachy Groom and Shastra VC, Alt Carbon is positioning itself as a full-stack carbon removal company, combining science, logistics, and carbon credit monetization.

Why it matters:
Durable carbon removal is a critical gap in global climate strategy, and ERW is one of the few scalable pathways.

What to watch:

• Ability to scale logistics (material sourcing + distribution)
• Verification and credit quality
• Corporate demand for high-quality carbon removal

3. pHydrogen (Japan, $2.1M Seed)

pHydrogen is developing seawater electrolysis technology to produce green hydrogen without relying on freshwater resources—a major constraint in conventional hydrogen production.

The company is currently moving from lab prototypes to field-scale validation, supported by Incubate Fund. By eliminating freshwater dependency, pHydrogen could significantly expand hydrogen production in coastal and water-stressed regions, addressing one of the key bottlenecks in the hydrogen economy.

Why it matters:
Water scarcity is a major constraint for hydrogen scaling. Solving this expands geographic viability of hydrogen projects.

What to watch:

• Efficiency vs traditional electrolysis
• Corrosion and system durability
• Transition from prototype to field deployment

4. 10Ants Enterprise (Thailand, $500K Pre-Seed)

10Ants Enterprise is repurposing underutilized urban warehouses into low-carbon SME hubs, targeting emissions from inefficient infrastructure in rapidly urbanizing cities.

Through pilot retrofits in Bangkok, backed by Wavemaker Impact, the company is demonstrating how existing real estate can be optimized for energy efficiency and shared usage, reducing both emissions and operational costs for small businesses. The model aligns with broader trends in urban retrofitting over new construction.

Why it matters:
Urban emissions are often tied to inefficient use of existing assets, not just new infrastructure.

What to watch:

• Replicability across cities
• Economics of retrofitting vs new builds
• SME adoption and occupancy rates

5. Amperesand (Singapore, $80M Series A)

Amperesand is tackling energy inefficiency in AI data centers and critical infrastructure through advanced power conversion systems. As AI workloads surge, data centers are facing increasing pressure to optimize energy usage.

The company’s technology focuses on improving how electricity is converted, distributed, and utilized, reducing energy loss at the infrastructure level. Its $80M Series A reflects strong investor conviction in efficiency-first solutions, especially as hyperscalers look for ways to manage rising energy demand.

Why it matters:
AI-driven energy demand is exploding. Efficiency at the infrastructure level is becoming as critical as generation.

What to watch:

• Adoption by hyperscalers
• Measurable efficiency gains
• Integration into existing data center stacks

6. Gridware (US with Asia Expansion, $55M Series B)

Gridware develops real-time grid monitoring systems designed to detect faults, prevent outages, and improve transmission reliability.

Its expansion into Asia, particularly India, highlights growing demand for grid resilience technologies as renewable energy integration increases system complexity. By enabling early fault detection, Gridware helps utilities reduce blackouts and improve grid stability at scale, a key requirement for energy transition.

Why it matters:
Grid instability is a major bottleneck for renewable energy adoption. Monitoring is foundational for scaling clean energy systems.

What to watch:

• Utility partnerships in India and Asia
• Impact on outage reduction metrics
• Integration with renewable-heavy grids

7. Promethean Energy (Asia-Pacific, Seed)

Promethean Energy focuses on recovering low-grade waste heat from industrial processes, one of the most underutilized energy sources globally.

Its systems are being deployed in manufacturing clusters, where they convert waste heat into usable energy, delivering 20–30% efficiency improvements. The value proposition is immediate—lower energy costs alongside emissions reduction—making it easier for industries to adopt without regulatory pressure.

Why it matters:
A large share of industrial energy is wasted. Capturing it delivers immediate ROI + emissions reduction, making adoption easier.

What to watch:

• Deployment across manufacturing clusters
• Payback period for customers
• Scalability across industries

8. Terracarb (Asia-Pacific, Strategic Round)

Terracarb is developing ultra-low-cost graphene production technologies, targeting industrial decarbonization in sectors like cement and steel.

Graphene has long been considered a high-potential material for improving strength, reducing material usage, and enhancing energy efficiency. However, cost barriers have limited its adoption. Terracarb’s approach aims to unlock commercial viability, potentially enabling large-scale emissions reductions in heavy industry.

Why it matters:
Material innovation is key to decarbonizing heavy industry, one of the hardest sectors to fix.

What to watch:

• Cost breakthrough vs existing graphene production
• Commercial adoption in cement/steel
• Performance improvements in real-world use

9. Thermistance (Asia-Pacific, Pre-Seed)

Thermistance is building energy-free cooling systems, designed to reduce reliance on traditional refrigeration and air conditioning.

With rising temperatures across South and Southeast Asia, cooling demand is expected to surge, significantly increasing electricity consumption. Thermistance’s approach focuses on passive cooling technologies, offering a low-energy alternative for urban environments and heat-vulnerable regions.

Why it matters:
Cooling demand is set to surge globally, especially in Asia. Solutions that avoid energy use can bend future demand curves.

What to watch:

• Effectiveness in extreme heat conditions
• Adoption in urban vs rural settings
• Cost vs traditional cooling alternatives

10. PhaBuilder (Asia-Pacific, Strategic Partnerships)

PhaBuilder is scaling production of PHA-based bioplastics, a biodegradable alternative to conventional plastics.

Rather than focusing solely on R&D, the company is entering commercialization through partnerships with global consumer brands, building a pipeline for sustainable packaging solutions. This signals a shift in circular economy startups from experimentation to supply chain integration.

Why it matters:
Plastic alternatives only matter if they reach supply chain scale, not just lab validation.

What to watch:

• Production capacity scaling
• Cost parity with conventional plastics
• Depth of brand partnerships

Capital Is Scaling with the Opportunity

Beyond energy and infrastructure, circular economy solutions are gaining momentum. PhaBuilder’s expansion in bioplastics demonstrates how material innovation is moving closer to commercial adoption. Partnerships with global consumer brands suggest that circular solutions are no longer experimental—they are entering mainstream supply chains.

This reflects a broader alignment between regulatory pressure, corporate commitments, and technological readiness.

The scale of capital flowing into climate tech is also evolving. Funds like responsAbility’s $460 million Asia climate strategy and 2150’s €210 million urban-focused fund indicate growing institutional confidence in the sector. These funds are not just backing early-stage innovation; they are targeting infrastructure, deployment, and long-term assets.

This shift is critical. Climate solutions, particularly in hardware and industrial sectors, require patient capital and longer timelines. The presence of dedicated funds suggests that the ecosystem is maturing to support that.

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Quick Takeaways

• Asia’s climate tech funding remains resilient, with $2.79 billion raised in 2025, but capital is becoming more selective and deployment-focused.
• The sector is shifting from pilot-stage innovation to real-world execution, with startups expected to demonstrate clear economic and operational value.
• Hardware and deeptech are leading the momentum, particularly in industrial decarbonization, energy systems, and cooling technologies.
• India is emerging as a proving ground, where startups validate cost, scale, and performance before expanding globally.
• Climate solutions are increasingly built around efficiency and cost parity, making adoption easier without relying on regulatory pressure alone.
• Adaptation technologies, especially cooling and urban infrastructure, are gaining importance alongside traditional mitigation solutions.
• Larger funds and infrastructure-focused capital signal a shift toward long-term, asset-heavy climate investments.
• The broader ecosystem is becoming more coordinated, with India validating, Southeast Asia deploying, and Japan/Singapore engineering precision technologies.