SaaS

Software as a service (SaaS) is a cloud computing model that delivers software applications over the internet. Instead of downloading software to a device, users interact with applications through a web browser or thin client interface.

Since SaaS providers manage the infrastructure, updates and security, this model frees local storage, simplifies IT management and supports cost-effective scalability, typically through a subscription-based pricing model. Users pay a recurring fee (monthly or annually) to access the software, which reduces upfront costs and aligns IT spending with business growth.

Micron’s advanced memory and storage technologies play a foundational role in enabling SaaS performance at scale, powering hyperscale data centers and cloud-native applications with low-latency, high-bandwidth infrastructure.

Read more to see how software as a service works, or contact our Sales Support team to see how we can help you.

What is SaaS?

SaaS definition: Software as a service is a ​​cloud computing model that provides users with access to software and files over an internet connection via a web browser or an application.

SaaS abstracts the complexity of infrastructure and platform management, offering a turnkey experience for users. SaaS providers manage the full software stack — including infrastructure, updates and security — so that users can focus on productivity without the overhead of IT maintenance. Most SaaS solutions follow a pay-as-you-go or subscription-based model, allowing users to scale access based on need.

SaaS platforms are designed for multi-tenancy use, meaning multiple users share the same infrastructure while maintaining data isolation. This architecture supports rapid deployment, global accessibility and automated updates, making SaaS ideal for both enterprise and consumer use cases.

SaaS products span a wide range of categories, including:

• Enterprise tools: Customer relationship management (CRM) systems (e.g., Salesforce, HubSpot), enterprise resource planning (ERP) platforms
• Project management: Asana, Trello
• Productivity suites: Google Workspace, Microsoft 365
• Consumer applications: Streaming services like Netflix and Spotify

How does SaaS work?

SaaS uses cloud computing infrastructure to deliver software remotely. Users connect via the internet to access applications hosted by the provider. Key features include:

• Automatic updates: Providers roll out patches and upgrades centrally.
• Elastic scalability: Resources scale with demand, supporting dynamic workloads.
• ​​Cloud security: Data is protected through encryption, access controls and compliance frameworks.
• Data storage: Files may reside locally or in the cloud, depending on the application.

Micron’s NAND and DRAM solutions help ensure fast access to data, seamless user experiences and reliable uptime for SaaS platforms.

What is the history of SaaS?

The evolution of software as a service reflects broader trends in computing, from centralized systems and virtualization to cloud-native platforms and consumer adoption. Each phase marks a shift in how software is delivered, accessed and scaled.

• 1970s, virtualization and centralized computing: Virtualization allowed a single physical machine to act like multiple independent systems by creating virtual versions of hardware components. IBM’s VM/370 introduced time-sharing, enabling centralized software access, which was an early precursor to SaaS.
• 1990s, rise of internet-delivered applications: Companies like NetSuite, WebEx and Salesforce pioneered hosted applications for customer relationship management, accounting and conferencing, thereby proving that software could be accessed remotely and maintained centrally.
• 2000s, cloud infrastructure and enterprise adoption: Cloud computing enabled SaaS to scale rapidly. Enterprises adopted SaaS for mission-critical workloads, drawn by its flexibility, subscription-based pricing and reduced IT overhead.
• 2010s, consumerization and ubiquity: SaaS expanded into everyday life. Netflix and Spotify, along with productivity suites like Google Workspace and Microsoft 365, brought SaaS to homes and mobile devices.
• 2020s and beyond, intelligent SaaS at scale: SaaS is evolving into intelligent, data-driven platforms powered by AI and automation. Micron’s high-performance memory and storage solutions help enable the responsiveness and scalability that modern SaaS platforms demand.

​​​​​What are the key types of SaaS?

Software as a service is part of a broader cloud computing framework that includes infrastructure as a service (IaaS) and platform as a service (PaaS). Each model offers different levels of control, customization and responsibility, helping organizations choose the right balance for their needs. 

While there are no distinct types of SaaS, it’s important to understand how SaaS compares to other major cloud service models that serve different purposes.

Together, these models reflect a shift from software ownership to service consumption, enabling organizations to scale operations, reduce costs and accelerate innovation.

Micron’s memory and storage technologies support all layers of this stack, ensuring performance and reliability across IaaS, PaaS and SaaS deployments.

Infrastructure as a service

​​​IaaS allows users to access raw IT resources — such as virtual servers, storage and networking — over the cloud. These resources are hosted by an IaaS provider but managed by the user.

For example, a company might use IaaS to host its own website or run custom applications on virtual machines without owning physical hardware. This model offers maximum control and flexibility but requires significant IT expertise. 

Platform as a service

​​PaaS provides a cloud-based environment for developers to build, test and deploy applications. It includes tools, frameworks and runtime environments, while the provider manages the underlying infrastructure.

A software team might use PaaS to develop a mobile app collaboratively, without worrying about server setup or operating system updates. PaaS supports rapid development cycles and scalability but offers limited control over the environment compared to IaaS.

Unlike SaaS, which delivers fully managed applications ready for immediate use, PaaS empowers developers to create custom solutions without handling infrastructure complexity, bridging the gap between raw resources and turnkey software.

How is SaaS used?

SaaS is used across industries to deliver scalable, cloud-based applications that support both enterprise operations and consumer experiences. Its flexibility and subscription-based model make it ideal for organizations seeking agility, cost control and global accessibility.

One of the most common enterprise deployments of SaaS deployments is customer relationship management software. Platforms like Salesforce and Hubspot allow businesses to manage customer data, automate workflows and scale operations, all through a cloud interface that eliminates the need for on-premises infrastructure.

SaaS has also enabled transformational shifts in business models. For example, Netflix began as a DVD-by-mail service, constrained by physical logistics and inventory. By pivoting to a SaaS-based streaming platform, Netflix leveraged cloud infrastructure to deliver on-demand content to millions of users globally, redefining media consumption and scaling its subscriber base exponentially.