SaaS Definition
Understanding the Software as a Service deployment model definition and explanation
What is SaaS?
SaaS definition
Software as a Service (SaaS) is a cloud-based deployment model in which independent software vendors (ISVs) host their applications and provide access over the internet, handling infrastructure, updates, security, and support on behalf of their customers. Customers can start using the application right away: onboarding is limited to learning the software itself, and infrastructure maintenance is fully offloaded to the vendor.
How does SaaS work?
The vendor hosts the application and customers pay a subscription fee, usually priced per seat, by usage, or as a flat rate. Users access the software through a web browser or a client app with their login credentials. The vendor handles all updates, patches, and infrastructure changes, so customers can focus on using the application rather than managing the hardware, networks, or servers it runs on.
Why Choose SaaS?
SaaS is often chosen for its convenience and lower upfront costs. Organizations can scale their application usage without taking on infrastructure management, which makes SaaS a good fit for startups, fast-growing businesses, and companies that don’t want to invest heavily in IT. It also works well for distributed teams and remote workforces, since employees can reach applications and data from anywhere with internet access.
SaaS suits businesses that don’t require stringent control over data location, such as retail, professional services, and creative industries. As a deployment model, it is the most convenient and straightforward option, at the expense of user control. Organizations that need that control typically look at self-hosted or BYOC deployments instead; our deployment model comparison covers the trade-offs in detail.
