SaaS (Software as a Service)

What is SaaS?

SaaS (Software as a Service) is a cloud-based software delivery model where applications are accessed over the internet, typically through a subscription. Unlike traditional on-premise deployments, SaaS requires no installation or maintenance on local devices. Everything is hosted and managed by the provider. 

Users access SaaS applications through a web browser, while the vendor handles hosting, updates, security, backups, and scalability. This makes SaaS one of the most common delivery models for modern business software, including digital experience platforms. 

Why is SaaS important?

SaaS improves agility while reducing technical burden. By removing the need for installation, infrastructure management, and manual maintenance, teams can focus more on delivering digital experiences and less on operating software. 

For organizations running marketing, content, and customer experience platforms, SaaS enables faster onboarding, predictable costs, and continuous access to new features without disruptive upgrades. 

How does SaaS work, and why does it matter?

SaaS runs on cloud infrastructure managed entirely by the software provider. Users log in through a browser and work in a shared application environment that is licensed through a subscription model. 

This matters because responsibility shifts away from the customer. Infrastructure, scaling, availability, and security are handled by the vendor, while customers benefit from faster time to value and reduced operational complexity. Costs become predictable, and platforms can evolve continuously instead of through large, infrequent upgrade projects. 

How does Xperience by Kentico support SaaS? 

Xperience by Kentico uses a single-tenant SaaS architecture to deliver the benefits of SaaS, such as fast onboarding, automatic updates, and zero infrastructure management, while maintaining data isolation and flexibility. 

Each customer runs in their own dedicated environment, including application and database. This approach ensures stronger data privacy and compliance, including GDPR support, minimizes risks of shared performance issues, and enables safe customizations without impacting other tenants. It also aligns with enterprise needs for governance, auditability, and long-term scalability. 

How do companies benefit from a SaaS?

Organizations such as The Parking Spot adopt SaaS to reduce operational overhead and increase speed. Common benefits include faster deployment, lower upfront costs, simplified maintenance, and easier scaling as business needs change. 

Industry analysts consistently report that SaaS adoption reduces total cost of ownership over time by eliminating hardware investment, upgrade projects, and infrastructure staffing. Today, the majority of enterprise software categories are dominated by SaaS delivery models, reflecting how widely this approach has been adopted. 

What is the difference between SaaS, on-premise, and private cloud? 

SaaS is fully managed by the vendor and accessed via the cloud. On-premise software is installed and maintained on servers owned by the customer. Private cloud runs in a dedicated cloud environment, such as AWS or Azure, but is managed by the customer or a partner. 

Deployment scenarios: 

• SaaS offers fast setup with no infrastructure required.
• Private cloud provides flexibility but requires DevOps resources.
• On-premise delivers maximum control at higher cost and slower deployment speed.

What’s the difference between IaaS, PaaS, and SaaS?

IaaS, PaaS, and SaaS are three cloud service models that differ mainly in how responsibility is shared between the customer and the provider.

Infrastructure as a Service (IaaS) 

• Provides virtualized computing resources such as servers, storage, and networking. The cloud provider manages the physical infrastructure, while the customer is responsible for everything above it, including the operating system, runtime, applications, and data. 
• This model offers the highest level of control and flexibility and is best suited for organizations with DevOps teams that need to customize and manage their environments. 
• Common examples include Microsoft Azure Virtual Machines, Amazon EC2, and Google Compute Engine.

Platform as a Service (PaaS) 

• Sits one level higher. It provides a managed platform for building, testing, and deploying applications without requiring teams to manage servers or operating systems. 
• In a PaaS model, the provider manages the infrastructure, OS, and runtime, while developers focus on applications and data. This approach balances flexibility with simplicity and is commonly used to accelerate development. 
• Examples include Azure App Service, Google App Engine, and Heroku.

Software as a Service (SaaS) 

• Delivers complete applications over the internet. The provider manages the entire stack, including infrastructure, platform, application, security, and updates. 
• Customers simply log in and use the software, typically through a subscription. SaaS offers the least operational overhead and is ideal for teams that want to focus on business outcomes rather than technology management. 
• Examples include Microsoft 365, Salesforce, and Xperience by Kentico.

In short, IaaS offers maximum control and responsibility, PaaS reduces operational effort while supporting development flexibility, and SaaS removes infrastructure concerns entirely by delivering ready-to-use software.

What is the difference between single-tenant and multi-tenant SaaS?

Single-tenant and multi-tenant SaaS differ in how application instances and infrastructure are shared between customers. In a single-tenant SaaS model, each customer has a dedicated instance of the application and database. In a multi-tenant SaaS model, multiple customers share the same application and infrastructure, with logical separation of their data.

Single-tenant SaaS offers stronger data isolation, greater customization flexibility, and better support for compliance requirements. It also provides more consistent performance, since resources are not shared with other tenants. The tradeoffs are higher hosting costs and potentially more complex update orchestration if automation is not in place.

Multi-tenant SaaS prioritizes cost efficiency and operational simplicity by running all customers on shared infrastructure. This makes it easier for vendors to manage updates and scale centrally, but it typically comes with reduced customization options and a higher level of shared risk related to performance or compliance.

Both approaches are valid, and the right choice depends on an organization’s priorities, whether that’s control, security, and compliance, or cost efficiency and simplicity.

What are the pros and cons of SaaS vs. Private Cloud for DXP projects?

SaaS excels in speed, cost efficiency, and reduced operational overhead. Private cloud provides deeper infrastructure control and customization but requires DevOps expertise and longer deployment timelines. 

Choose SaaS when speed, simplicity, and predictable costs are priorities. SaaS is ideal for organizations that want to focus on content, marketing, and customer experience rather than infrastructure management. 

Private cloud is better suited for organizations with strict compliance requirements, specialized hosting needs, or internal DevOps teams.