Electronic sourcing is a digital procurement method that allows organizations to source goods and services through online platforms. This approach leverages digital tools to facilitate vendor selection, negotiation, bidding, and other procurement activities, promoting efficiency, transparency, and cost-effectiveness in the tendering process. Despite the advantages, many public organizations have been slow to adopt e-sourcing, particularly in countries like Kenya, where the digital infrastructure for e-sourcing is improving but not yet fully integrated across public sectors. The purpose of study was to establish the adoption elecronic sourcing (e-sourcing) and its effect on tendering process in public universities in Kenya. The study wsa grounded on Diffusion of Innovation Theory. The study employed descriptive research design that aimed to gather evidence through analysis in order to provide a description of the study population. The target population included 136 potential respondents from all 34 public chartered universities in Kenya targeting heads of procurement, heads of stores, heads of finance, and heads of ICT, who provided valuable insights based on their expert knowledge and experience in the application of electronic procurement systems. The study employed Slovin's formula to draw a sample size of 102 repondents. Primary data for the study was obtained through a structured questionnaire where 90 respondents completed them and returned for analysis. Data collected was scrutinized for consistency, accuracy, completeness, and uniformity in preparation for analysis. Data was coded and analyzed using the Statistical Package for Social Sciences (SPSS) for descriptive and inferential statistical and the findings were presented in tables. Results of the Model summary indicates R² value of 0.417 which means that approximately 41.7% of the variance in the effectiveness of the tendering process can be explained by e-sourcing. The results of regression, reveal that e-sourcing has a p-value = 0.000 and since the p- value is < 0.05, the null hypothesis was rejected. The study concluded that adoption of e-sourcing has statistically significant effect on tendering process in public universities in Kenya. Based on the regression analysis of e-sourcing and its effectiveness on the tendering process, the study recommendations that organizations should allocate resources to acquire and implement advanced e-sourcing platforms and tools because these technologies can streamline the procurement process, enhance supplier interactions, and lead to better pricing and quality.