3D construction technology startup Kelvin6K featured on Shark Tank India, where founder Dr. Pradeep Kumar Sundarraj, Dr. Ravi Kant Upadhyay and Deepiga Sugumar presented their vision of transforming the construction industry through mobile, autonomous 3D printing solutions focused on speed, cost efficiency, and design flexibility.
During the pitch, the founder highlighted that Kelvin6K operates in the emerging 3D-printed construction segment, offering Construction-as-a-Service (CaaS) in India while planning international sales of its 3D printers. A key differentiator is its mobile and autonomous 3D construction printer, designed for quick deployment and rapid on-site execution.
The company manufactures its machines entirely in-house and uses concrete as the primary raw material. Kelvin6K has been granted patents in India, has filed under the Patent Cooperation Treaty (PCT), and has also applied for patents in the United States.
So far, the company has not sold any machines but has successfully completed eight buildings and eleven bus stops using its proprietary technology. The founder shared that a two-foot pillar can be printed in just 20 minutes, while a fully 3D-printed education centre can be completed within 15 days.
Entering the Tank, Kelvin6K sought ₹1 crore for 1.3% equity, valuing the company at ₹76.92 crore.
Financially, the company reported revenue of ₹30 lakh in FY23–24, followed by ₹72 lakh in FY24–25. Year-to-date sales stand at ₹1.2 crore, with projected revenue of ₹2.5 crore in FY25–26. EBITDA stood at -₹39 lakh in FY23–24 and -₹20 lakh in FY24–25, with year-to-date losses at -₹10 lakh.
To date, Kelvin6K has raised ₹1.85 crore, ₹1 crore in January 2024, ₹35 lakh in April 2024, and ₹50 lakh in September 2024. A secondary sale of ₹60 lakh was also executed involving Dr. Ravi and Dr. Pradeep Kumar.
The current equity split stands at 75.2% with Dr. Pradeep Kumar, 8.65% with Dr. Ravi, 9.62% with Deepiga, and 6.53% with investors.
After negotiations, Ritesh closed the deal by investing ₹1 crore for 2.86% equity along with 2.14% advisory equity, revising the company’s valuation to ₹35 crore.
The founder also outlined the long-term vision of 3D-printing structures on the Moon and Mars by 2030, along with future plans for solar-based construction using sand.
