Schedule delays are very common in construction projects that results in delay claims progressively. There are many techniques developed and used in the analysis and measurement of construction schedule delays. The popular and accepted techniques include the time impact method, the collapsed as-built method and the contemporaneous method. However, it is time-consuming to run those techniques manually. It is necessary to find a better way to perform a comprehensive analysis. Computer-based programs would be the only way to do such an analysis. This study compares two delay analysis software systems about their system requirements, software functions and employed analysis methodologies. Furthermore, a simplified example is used in demonstrating the differences between the systems. Study results show that the evaluated systems can help the analysts to do heavy and complicated calculations. The results of this paper would be helpful for the delay analysts that want to select a suitable system for their construction schedule delay analyses.