| Geothermal India | geothermalindia.com | New Delhi | No installed capacity data available, but a key player in India's geothermal energy sector. |
| Thermal Powertech Corporation | thermalpowertech.com | Mumbai, Maharashtra | Focuses on renewable energy solutions including geothermal power. |
| Indian Oil Corporation Ltd. (IOCL) | iocl.com | New Delhi | Exploring geothermal energy as part of its renewable energy initiatives. |
| ONGC Energy Centre | ongc.com | Dehradun, Uttarakhand | Not specifically focused on geothermal, but a significant player in India's energy sector. |
| National Geothermal Project | moef.gov.in | New Delhi | Government project exploring geothermal energy potential in India. |
| Tata Power | tatapower.com | Mumbai, Maharashtra | Involved in renewable energy, including geothermal. |
| Bharat Heavy Electricals Ltd. (BHEL) | bhel.com | New Delhi | Partnering in geothermal energy projects. |
| GE India | ge.com/in | Bengaluru, Karnataka | Part of global efforts in renewable energy, including geothermal power. |
| Indian Renewable Energy Development Agency Ltd. (IREDA) | ireda.in | New Delhi | Supporting geothermal and other renewable energy projects in India. |
