The cleantech sector is witnessing a surge of innovation, with startups developing solutions that address environmental challenges while promoting sustainability. Tamil Nadu Global Startup Summit (TNGSS) 2025 showcased several such startups making significant strides in this domain. Here’s a curated list of the most promising cleantech startups to watch.
Generation-One Saver Pollution Control Pvt Ltd
Generation-One Saver is a CleanTech startup developing industrial air pollution control units that convert smoke into breathable oxygen. Their technology uses advanced microalgae filtration to recover resources and achieve negative carbon emissions.
Stall No: B202, Hall G
Plugzmart
Plugzmart is a full-stack EV charging technology company offering AC, DC, and portable chargers with intelligent software. The startup makes EV charging sustainable, reliable, and accessible for fleets, businesses, and everyday drivers worldwide.
Stall No: C12, Hall D
Phycosol Ecotech Pvt Ltd
Phycosol Ecotech develops algae-based eco-solutions for water treatment, air purification, and urban environments. Their innovation-driven approach supports circular economy principles while improving air and water quality.
Stall No: A141, Hall D
Bhaskara Engineering Services Pvt Ltd
Bhaskara Engineering is a quality driven Engineering Solutions and Services provider for CAD / CAE / CFD domains. They offer a range of engineering services, including structural fabrication and installation, to support the implementation of renewable energy projects.
Stall No: B138, Hall D
DFB Natural Things Private Limited
DFB Natural Things offers energy-efficient electrical and electronic products including LED lighting, EV batteries, and BLDC fans. Their products are designed to support sustainable energy use in residential and commercial applications.
Stall No: B211, Hall G
Orcci Technologies LLP
Orcci Technologies drives sustainable waste management with biogas systems and automated composting solutions. The Chennai-based startup helps businesses reduce environmental footprints, save costs, and meet ESG and net-zero goals.
Stall No: B175, Hall D
KARDLE Industries Private Limited
KARDLE Industries pioneers portable, modular carbon capture and air restoration systems for industrial, commercial, and residential use. Their solutions target CO₂, CO, SOx, NOx, PM, and VOC reduction with advanced Direct Air Capture (DAC) technology.
Stall No: B162, Hall D
Matterless Technologies OPC Private Limited
Matterless Technologies provides smart solar automation modules that optimize rooftop solar energy usage at home. Their system learns household energy patterns, adapts to weather, and self-optimizes for maximum efficiency.
Stall No: A88, Hall D
Sustainabyte Technologies Private Limited
Sustainabyte Technologies delivers AI-powered solutions for energy and asset management under Industry 4.0/5.0 frameworks. Their tools help businesses monitor, analyze, and optimize utility systems to improve efficiency and sustainability.
Stall No: A133, Hall D
SustainWorld Pvt Ltd
SustainWorld offers sustainability consulting and training to build climate-ready businesses and professionals. Through their learning division, SustainWorld Academy, they help organizations comply with climate regulations and create long-term environmental value.
Stall No: B165, Hall D
Disclaimer: This list is not a ranking of the “best” startups. It has been curated by our editorial team based on unique and interesting factors observed from the event. This is a growing list, and if you believe your startup deserves to be featured, you can submit your startup at taalk.com/startup-summit-submission/ for consideration. Please note that not all submissions will be featured — final inclusion is at the discretion of our editorial team.
