SaaS stands for Software as a Service. If you’ve ever used Gmail to send an email or Google Docs to edit a document, you’ve already used SaaS. You open the application, sign in, and get on with your work. There’s no need to set up your own servers or maintain the software running behind the scenes.
The same idea applies to business tools like Slack and Salesforce. Companies use them to communicate with employees, organize customer information, and manage daily tasks. The software provider runs the application and takes care of its underlying systems, while customers manage their accounts and the work they do inside it.
That’s what makes SaaS different from software a business installs and operates on its own infrastructure. The application is delivered as a service, rather than something the customer has to run.
What Does SaaS Mean?
One simple way to define SaaS is this: you use the software, while the provider takes care of running and maintaining it. You don’t need to manage servers or handle the technical work behind the application.
Software as a Service is a cloud computing model in which a provider hosts an application and makes it available to users over the internet.
The words “as a service” are important here. They describe how the software is delivered and managed.
Take an accounting application as an example. With traditional on-premises software, a business might install the program on an office computer or its own server. Someone would need to handle updates, backups, and technical problems.
With a SaaS accounting platform, much of that work moves to the provider. Employees sign in, record transactions, generate invoices, and use the features they need.
The company still manages its financial information and employee access, but it doesn’t have to operate the servers hosting the application.
SaaS is part of a much broader technology model called cloud computing. Cloud computing also includes services that provide storage, infrastructure, and tools for building applications.
How Does SaaS Work?
When you use a SaaS application, you’re connecting to software running on the provider’s infrastructure.
Here’s what happens when someone opens an online accounting platform to create an invoice.
They sign in to their account, enter the customer’s details, and save the invoice. The application processes the information and stores the record according to the service’s design. When an authorized team member signs in later, they can access the saved information without asking the first employee to send a separate file.
All of this happens through the hosted application.
The software may run on servers owned by the provider or on infrastructure rented from a cloud company. Those servers operate in data centers, which house the computing equipment needed to process and store information.
Who Manages the Software?
One of the main differences between SaaS and self-hosted software is the division of responsibility.
The provider typically handles application hosting, infrastructure maintenance, software updates, and the technical systems that keep the service available.
Customers have their own responsibilities, including managing users, setting permissions, and protecting the information they upload.
| Responsibility | Usually handled by |
|---|---|
| Hosting infrastructure | SaaS provider |
| Application updates and maintenance | SaaS provider |
| Core application availability | SaaS provider |
| Employee accounts and permissions | Customer |
| Accuracy of entered business data | Customer |
| Use of available security settings | Customer |
| Data protection obligations | Shared, depending on the service and agreement |
The exact responsibilities vary between providers. It’s worth reviewing the service agreement, especially when the application will hold confidential business or customer information.
Does SaaS Require Installation?
Not always.
Many SaaS applications work in a browser, but some also offer downloadable desktop or mobile apps.
Slack and Zoom are good examples. Both provide installed applications while relying on hosted services for their main communication features.
So, installing an app doesn’t automatically mean it isn’t SaaS. What matters is how the core software service is delivered and managed.
Common Examples of SaaS
You probably use more SaaS products than you realize. Some handle simple personal tasks, while others support entire business departments.
Here are a few familiar examples.
| SaaS product | Common use |
|---|---|
| Gmail | Sending, receiving, and organizing email |
| Google Docs | Creating and editing documents with others |
| Slack | Team messaging and workplace communication |
| Salesforce | Managing customer records and sales activities |
| Zoom | Video meetings and online communication |
| Dropbox | File storage, sharing, and synchronization |
| HubSpot | Marketing, sales, and customer service activities |
| Shopify | Managing an online store through a hosted commerce platform |
What connects these products isn’t their purpose. An email service and a customer management platform do very different jobs.
The similarity is in how they’re delivered. Their providers operate the software and make its features available to customers online.
That doesn’t mean every website is SaaS. A news website or an ordinary company homepage, for instance, isn’t automatically a SaaS product just because someone can open it in a browser.
SaaS refers to a hosted software application offered to users as a service.
How Different Industries Use SaaS
Businesses use SaaS for far more than email and video meetings.
A retailer may rely on an online inventory system, while an HR department uses cloud software to track job applications and employee leave. Schools, accounting firms, and healthcare organizations have their own requirements.
| Industry | Common SaaS applications |
|---|---|
| Healthcare | Appointment scheduling and practice management |
| Education | Online learning platforms and assignment management |
| Retail | Inventory, order management, and customer support |
| Human resources | Recruitment, onboarding, and employee records |
| Accounting | Invoicing, bookkeeping, and expense tracking |
| Marketing | Email campaigns, analytics, and customer management |
| IT support | Helpdesk tickets and service request tracking |
Consider a small retail store that uses online accounting software. The owner can check invoices from home, while an accountant works with the same records from another location.
They don’t need to maintain a separate accounting server in the store.
For businesses with sensitive records, convenience is only one consideration. A healthcare practice, for example, must also check whether its chosen software meets the privacy and security requirements that apply to its operations.
SaaS vs. Traditional Software
SaaS and traditional on-premises software can provide similar features. The main difference is where the application runs and who looks after it.
A company using on-premises software generally has more direct control over its infrastructure. That control also brings maintenance responsibilities.
A SaaS customer gives up some of that control in exchange for a provider-managed service.
| Feature | SaaS | Traditional on-premises software |
|---|---|---|
| Hosting | Provider-managed | Customer-managed |
| Setup | Often requires less infrastructure setup | May require local servers and installation |
| Maintenance | Mainly handled by the provider | Mainly handled by the customer |
| Updates | Usually managed by the provider | Often installed or managed internally |
| Access | Typically through an internet connection | Depends on the application and network |
| Infrastructure control | More limited | Greater direct control |
| Pricing | Often subscription or usage-based | May use licenses, subscriptions, or support contracts |
Neither approach is automatically the best choice.
A small company without dedicated IT staff might prefer SaaS because it reduces the amount of infrastructure to manage. A larger organization with highly specialized systems may have reasons to keep certain applications on its own servers.
Cost matters too. SaaS can lower upfront infrastructure expenses, but recurring payments may add up over several years.
Is SaaS the Same as Subscription Software?
No, although the two often go together.
A subscription describes how customers pay for software. SaaS describes how the software is delivered.
A desktop program can charge a monthly fee and still run mainly on a customer’s computer. On the other hand, a SaaS application can offer a free plan without charging its users.
Software doesn’t become SaaS simply because it has a subscription.
The important distinction is that a provider operates the application and delivers it as a service.
Benefits of SaaS
There are practical reasons businesses choose SaaS, especially when they need software without the cost and work of maintaining additional infrastructure.
Less Work for IT Teams
Installing and maintaining business software can take time. Servers need attention, applications need updates, and technical problems have to be resolved.
With SaaS, the provider handles much of this work.
A small business can often start using a project management or accounting tool without buying a server or hiring someone to maintain the application.
Internal IT work doesn’t disappear completely, though. Employees still need accounts, permissions, support, and sometimes training.
Easier Access for Teams
SaaS is particularly useful when people work from different locations.
A project manager can update a shared task board from the office while colleagues check their assignments from home. Everyone works with the information held in the same service, subject to their access permissions.
This is often more convenient than sending updated files back and forth.
Accessibility depends on the product, internet connectivity, and the organization’s security policies. Not every SaaS tool supports the same devices or offline features.
Room to Grow
Business software needs change.
An agency might start with five people using a project management application. A year later, it may have fifteen employees and need more user accounts, storage, or reporting features.
Many SaaS products let customers make those changes through their existing plans.
That can be easier than expanding locally hosted infrastructure, although larger plans and additional features may increase the bill.
Lower Upfront Infrastructure Costs
SaaS often reduces the need to purchase servers and maintain the infrastructure behind an application.
Instead, customers pay for access according to the provider’s pricing model.
That can make it easier for smaller businesses to get started. However, it doesn’t guarantee that SaaS will be cheaper over the lifetime of a product. Long-term costs depend on subscriptions, usage, integrations, and support requirements.
Disadvantages of SaaS
SaaS makes many tasks easier, but it also puts part of a business’s software operations in the hands of an external provider.
That creates a few things worth checking before making a commitment.
Internet Dependence and Service Outages
Most SaaS products rely on an internet connection for their main features.
When the connection is slow, work may be interrupted. If the provider experiences an outage, employees may temporarily lose access even when their own internet connection works.
Some applications offer offline access, but the available features differ from one product to another.
Businesses that depend on a particular service for essential work should have a plan for outages.
Integration Challenges
A SaaS tool doesn’t always fit neatly with the software a company already uses.
Suppose a business manages customers in one application and invoices in another. If the two systems cannot exchange data, staff might have to copy customer details manually.
That becomes frustrating as the number of transactions grows. It can also lead to errors.
Some SaaS providers offer ready-made integrations or application programming interfaces (APIs) that let software systems exchange information.
But integrations aren’t always included in basic plans. They may require additional fees, configuration, or technical support.
Before adopting a new application, check that it connects with the tools your team depends on and that those connections support the data you actually need to share.
Security and Compliance
Using SaaS means trusting an external provider with at least part of your software environment. In many cases, business information will also be stored or processed on infrastructure outside your organization.
A reputable provider may offer encryption, access controls, backups, and security monitoring. Those safeguards are important, but they don’t remove the customer’s responsibilities.
For example, an HR team using SaaS to store employee records still needs to decide who can view those records. If every employee has unnecessary access, the company’s information may be exposed even if the provider’s infrastructure is secure.
When assessing a SaaS provider, check its security documentation, available audit reports, data retention policies, and account protection options.
SOC 2 reports and ISO 27001 certifications can provide useful evidence about security controls or management practices. Their scope matters, and neither should be treated as a guarantee against security incidents.
Data location and privacy obligations also deserve attention. A company may need to know where information is processed, who can access it, and what happens to it when the service ends.
Requirements vary by industry and country. Healthcare and financial organizations, in particular, may face additional obligations.
Ongoing Costs and Vendor Lock-In
A small monthly fee can look attractive at first. The total changes when a team adds more users, needs advanced features, or pays for several related services.
Businesses should look beyond the entry-level price and estimate what they’ll actually spend.
There’s also the issue of vendor lock-in.
After using one platform for years, a company may have important records, custom workflows, and integrations tied to it. Moving to another provider can involve data migration, retraining staff, and rebuilding processes.
Checking data export options and cancellation terms before signing up can prevent problems later.
How Does SaaS Pricing Work?
There’s no single pricing model that every SaaS company follows.
Some charge a fixed monthly or annual fee. Others calculate the price according to users, features, or usage.
The most common approaches include:
- Subscription pricing: A recurring fee for access to an application or plan.
- Per-user pricing: Charges based on the number of users or seats.
- Usage-based pricing: Costs linked to storage, transactions, API requests, or another usage measure.
- Freemium pricing: Basic features are free, with paid plans for additional capabilities.
- Tiered pricing: Different packages offer different features or limits.
A small team might pay for five user accounts in a project management tool. As the team grows, the subscription cost may increase with each additional seat.
A different service might charge based on the volume of data processed rather than the number of people using it.
Businesses offering recurring software plans also need to handle billing, renewals, upgrades, and cancellations. These processes are covered in more detail in our guide to SaaS subscription management.
For customers, the main thing is to understand what’s included in the plan and what will cost extra.
SaaS vs. PaaS vs. IaaS
SaaS is often mentioned alongside two other cloud computing models: Platform as a Service (PaaS) and Infrastructure as a Service (IaaS).
They sound similar, but they’re built for different needs.
| Cloud model | Full name | What it provides | Typical users |
|---|---|---|---|
| SaaS | Software as a Service | Ready-to-use software applications | Individuals and businesses |
| PaaS | Platform as a Service | Tools and environments for building applications | Software developers |
| IaaS | Infrastructure as a Service | Virtual servers, storage, and networking | Developers and IT teams |
SaaS: Using an Application
SaaS is for people who need software to get work done.
You might use Salesforce to manage customer information or Google Docs to write a report. The provider manages the application and its infrastructure.
You don’t need to build the software yourself.
PaaS: Building an Application
PaaS is designed mainly for developers.
It provides a managed environment in which they can build, test, and deploy applications without operating all the underlying infrastructure.
Developers focus more on their code and applications, while the platform provider manages much of the supporting technology.
IaaS: Managing Computing Resources
IaaS gives customers access to infrastructure such as virtual machines, networking, and storage.
The provider manages the underlying physical systems, while customers generally have more responsibility for operating systems, applications, and configuration.
Put simply, SaaS gives you software to use, PaaS provides a platform to build software, and IaaS supplies infrastructure to run computing workloads.
How to Choose the Right SaaS Software
A product can have plenty of features and still be a poor fit for a business.
Start with the work that needs to get done.
For a small sales team, that might mean tracking customer conversations and following up on leads. For an accounting department, accurate invoices and reliable reports may matter more than anything else.
Once those requirements are clear, compare products based on how well they handle them.
Check whether the software integrates with your current tools, offers the access controls you need, and lets you export important data. Review the total price for your expected number of users, not just the cost of the cheapest plan.
Support and reliability are worth checking as well. If the application becomes unavailable during a busy workday, how will that affect your team? What support does the provider offer, and what does its service agreement promise?
A free trial can help answer some of these questions. Have the people who will actually use the software test their everyday tasks, rather than judging it only from a product demonstration.
The right SaaS application is the one that handles your work reliably, fits your budget, and doesn’t create more problems than it solves.
Final Thoughts
SaaS changes how people access and manage software. Instead of running an application on their own infrastructure, customers use a service maintained by the provider.
That’s why SaaS works well for many everyday applications, from email and document editing to accounting and customer management.
It’s convenient, but not without trade-offs. Internet access, recurring costs, software compatibility, data security, and dependence on a provider all matter.
Once you understand who runs the software, what you’re responsible for, and how the service is priced, it’s much easier to decide whether SaaS is a good fit.
