Objective: The study aimed to evaluate the performance of the three glucometers compared to standard the laboratory method (Cobas Integra 400 Plus) in measuring blood glucose levels. Patients and Methods: A total of 100 Yemeni diabetic patients were randomly recruited into a comparative crosssectional study. Venous and finger-pricked blood samples were obtained from all participants and used for blood glucose levels measurement following the standard procedures. Results: The mean blood glucose levels for one-hundred diabetic patients using the Gluco Contour TS and Gluco SD Codefree were not significantly different compared with the Cobas Integra 400 Plus (12.14 ± 6.89 mmol/L vs. 12.85 ± 8.83 mmol/L, P = 0.159; 12.50 ± 7.18 mmol/L vs. 12.85 ± 8.83 mmol/L, P = 0.490), respectively. However, there is a significant difference using the Gluco Alert device from that of the Cobas Integra 400 Plus (11.83 ± 6.94 mmol/L vs. 12.85 ± 8.83 mmol/L, P = 0.046). Furthermore, using the ROC curve at a 95% confidence interval, the Cobas Integra 400 Plus showed a significant agreement with the Gluco Contour TS (51.4%), Gluco SD Codefree (50.4%), and Gluco Alert (39.3%), respectively. For determining accuracy, the sensitivity of the glucometer devices was the following: Gluco SD Codefree (87.3%), Contour TS (85.9%), and Gluco Alert (78.9%). In this regard, the highest specificity was related to Gluco Contour TS (65.5%). Conclusion: The correlation between both me-How to cite this paper: Dahman, L.