Startups are vital for economic growth in Indonesia's technology ecosystem. Open innovation is crucial for them to leverage shared resources and validate product-market fit. Governance of technological innovation is necessary to support national capacity. This study assessed an early startup's capability to adopt open innovation and strategies to enhance innovation capabilities. An instrument was developed to evaluate the startup’s readiness for open innovation. Metrics for measuring openness and the impact on technological capabilities were examined. The questionnaire's assessment variables were established and categorized into technological components: technoware, humanware, inforware, and orgaware (T, H, I, O). A survey was conducted on the data was analyzed to determine the company's technological capability using the Technology Contribution Coefficient (TCC) metric to assess its ability to adopt open innovation. We found that the company has the capability to implement open innovation, but improving low-rated subcriteria, especially orgaware, is necessary for better technological capability and reaping the full benefits of open innovation. To improve financial sustainability, partnerships with external institutions for quality resources and collaborating with suppliers, customers, research institutions, or startups can reduce costs and open new market opportunities.