Software scalability is influenced by various factors such as architecture, which defines how components interact, and load balancing that distributes workloads across multiple servers. The choice of database systems can also impact scalability, especially in handling increased data loads. Cloud computing is another significant factor, as it allows for easier resource allocation. Furthermore, efficient code optimization enables software to run smoothly even when user demand increases. Overall, a well-planned design and implementation can greatly enhance the scalability of a software application.