Customers can access the software anytime, from anywhere, and configure it to meet their needs without involving the provider in setup or implementation tasks. SaaS providers often use the infrastructure of major cloud providers such as AWS, Microsoft Azure or Google Cloud Platform to ensure high availability, security and scalability.
For businesses considering their own SaaS offering, it's worth noting that top-tier cloud services can be extremely expensive. Many large companies, such as Dropbox and Basecamp, have moved to their own data centres to reduce costs. For startups, it may be more advisable to consider tier 2 providers such as Hetzner or Digital Ocean, which offer more cost-effective solutions.