Lisbon & Porto, Portugal – Portugal is quietly becoming a hotspot for climate innovation and ESG-focused startups. From clean energy and sustainable construction to AI-driven ESG tools, Portuguese entrepreneurs are building solutions that help the planet while creating business opportunities. 10 of the most exciting climate and ESG startups in Portugal right now.
1. Cleanwatts – Making Clean Energy Accessible
Cleanwatts helps households, businesses, and communities use energy more efficiently while reducing carbon emissions. Using digital platforms and smart analytics, the company makes it easy for users to track energy use, generate renewable energy, and save money — all while contributing to a greener future.
2. Circular Unity – Simplifying Sustainability Reporting
🌐 Search “Circular Unity impactALL Portugal”
Circular Unity’s platform, impactALL, is helping companies measure and report their carbon footprint and circularity. With AI and real-time data, businesses can see exactly how their operations impact the environment, making sustainability reporting simpler and more accurate.
3. greenmetrics.ai – Climate Data You Can Trust
🌐 Search “greenmetrics.ai Portugal”
greenmetrics.ai provides real-time environmental monitoring using sensors and AI. Cities and businesses can track climate risks like floods and extreme weather, making smarter decisions that protect people and the planet.
4. AYR – Rewarding Green Choices
🌐 Search “AYR mobility Portugal”
AYR encourages people to make eco-friendly travel choices. The platform tracks CO₂ saved through walking, cycling, or public transport and rewards users for lowering their carbon footprint. It’s a simple but powerful way to promote sustainable habits.
5. CascataChuva – Harvesting Energy from Humidity
🌐 Search “CascataChuva climate startup Portugal”
CascataChuva is developing technology that generates electricity from atmospheric humidity. It’s an innovative approach to renewable energy, capturing power from an often-overlooked natural source.
6. OWLplaces AI – Smarter ESG Insights
🌐 Search “OWLplaces AI Portugal”
OWLplaces AI uses geospatial data and AI to track ESG performance in real-time. Real estate companies and infrastructure operators can monitor carbon emissions, climate risks, and sustainability metrics — helping them make smarter, more responsible decisions.
7. +Build – Sustainable Construction Solutions
🌐 Search “+Build startup Portugal”
+Build is rethinking how buildings are designed and constructed. Using sustainable materials and smart building methods, the startup is helping reduce carbon emissions in one of the world’s most energy-intensive sectors: construction.
8. GreenDash – ESG Made Simple for SMEs
🌐 Search “GreenDash Portugal sustainability platform”
GreenDash provides an easy-to-use platform for small and medium businesses to measure, report, and improve their ESG performance. By simplifying complex sustainability reporting, GreenDash makes it possible for smaller companies to embrace greener practices without getting lost in bureaucracy.
9. Flowco – Turning Waste into Opportunity
Flowco helps companies transform industrial and post-consumer waste into valuable products. From construction materials to sports surfaces, Flowco is making the circular economy a reality in Portugal turning trash into treasure.
10. CO2offset – Making Carbon Credits Accessible
CO2offset makes it easier for landowners and businesses to measure, sell, and buy carbon credits. By providing a transparent and efficient platform, the startup supports forest protection, sustainable land use, and real-world climate action.
Why Portugal’s Climate Startups Matter
Portugal is emerging as a leader in climate tech and ESG innovation thanks to a mix of talented entrepreneurs, supportive government initiatives, and growing global demand for sustainability solutions. These startups are proving that environmental impact and business success can go hand in hand. From renewable energy and smart analytics to circular economy innovations, Portugal is showing the world how small nations can make a big difference.
