The development of sustainable and environmentally friendly solutions is critical in today's world. Technology-based startups play a crucial role in achieving these goals through innovation and the use of advanced technologies. This study aims to qualitatively analyze the experiences of entrepreneurs in sustainable development and environmental domains within technology-based startups. This qualitative study utilized semi-structured interviews to collect data from 25 entrepreneurs active in sustainable development and environmental fields within technology-based startups. Theoretical saturation was achieved, and the data were analyzed using NVivo software. Four main themes emerged from the analysis: financial and investment challenges, technological challenges, environmental challenges, and opportunities and benefits of technology-based startups. Each theme included various subcategories and concepts, reflecting the diverse experiences and viewpoints of the entrepreneurs. The study highlights that technology-based startups face numerous challenges in sustainable development and environmental domains but also have significant opportunities. Addressing these challenges and leveraging the available opportunities can enhance the performance and sustainability of these startups.