What is SaaS? Characteristics, Advantages & Disadvantages

What is SaaS?

SaaS (Software as a Service) is a method of delivering software that lets multiple users access it remotely over the Internet as a web-based service. It is also called “on-demand software”. SaaS services are reached by users through a thin client, typically a web browser.

The full form of SaaS is Software as a Service. SaaS providers offer software to users over the Internet through a web browser. This software distribution model for cloud computing eliminates the need for local installation, storage space, or the risk of data loss. A cloud computing provider handles all of that and delivers the software straight to your web browser.

How does SaaS Work?

The SaaS model works through the cloud delivery model:

• A software provider hosts the application and related data using its database, servers, computing resources, and network.
• The service provider hosts the customer’s software and delivers it to the approved end users via the Internet.
• In the cloud computing model, the application’s source code remains the same for all customers, and whenever new functionalities and features are released, they are rolled out to every customer. However, this depends upon the service-level agreement (SLA).
• The customer’s data for each cloud computing model may be stored locally, in the cloud, or both locally and in the cloud.
• For example, the SaaS provider’s APIs can integrate a company’s software tools with the SaaS cloud computing model.

This cloud computing service is closely related to the on-demand computing software delivery models.

On-premise vs. Cloud Computing

Here are the differences between on-premises and cloud computing:

On-premises	Cloud Computing
The company or organization hosts everything in-house in an on-premises environment.	It is an on-demand computing paradigm wherein various workloads are hosted in the cloud.
It demands substantial upfront investment and operating expenses.	The cloud provides everything from infrastructure management to program execution.
It provides limited options for customization.	It offers plenty of options for customization.
On-premises environments offer less flexibility because of physical servers.	The scalability that a cloud environment offers is highly superior to on-premises models.
Enhancement of bandwidth and capacity depends on physically deploying new servers.	The cloud lets enterprises upgrade their requirements, be it memory, software, server space, and more.

Difference Between Single vs. Multi-Tenant SaaS Architecture

Beyond the hosting choice, SaaS providers also decide how many customers a single application instance serves. Here are a few important differences between single-tenant and multi-tenant architecture:

Parameters	Single-Tenant	Multi-Tenant
Definition	Single-tenant SaaS architecture caters to only one customer at a time.	Multi-tenant SaaS architecture supports multiple customers simultaneously.
Security	Every user/client has a dedicated secure database.	Data breaches can cause more damage.
Customization	It is easier to customize the dedicated architecture.	Every cloud architecture update will affect multiple clients.
Scaling Capabilities	Scaling up is a highly challenging task.	Scaling up becomes smooth and seamless.
Pros	Easy to manage the database with no duplication.	Needs very little code modification to ensure the client’s data is not mixed.
Cons	Resource-heavy architecture, so it is costly to maintain.	Harder to customize.

Key characteristics of SaaS

Here are the critical characteristics of SaaS:

• Easily customizable: The SaaS cloud computing model is designed to fit any organization’s unique requirements without significantly changing its infrastructure. Even frequent upgrades can be done in the background without affecting customer information.
• Built on multi-tenant architecture: It is built on a multi-tenant architecture, meaning that all users and applications share one centralized infrastructure and code. This enables SaaS vendors to innovate and saves time on code revision.
• Improved access: SaaS architecture offers better access to data than most other networks, so all users have secured access to the same information, making it easier for them to collaborate.
• Subscription-based pricing model: SaaS offers a subscription-based pricing model that allows you to subscribe whenever you want to use the application.
• Security: SaaS offers encrypted storage that limits access to sensitive information. You can also integrate the SaaS application with external key management frameworks to ensure extra protection.
• Collaboration: SaaS applications enable multiple users to collaborate. They allow users to comment, assign, and share tasks within the application to work together.

Challenges of SaaS Technologies

SaaS can pose specific challenges to an organization in the long run if mishandled. Here are some critical challenges for the SaaS cloud computing model:

Inconsistency in internet connection: A high-speed internet connection is important for running a SaaS architecture. The model does not work well over a fluctuating connection.

Less control: A SaaS application is entirely managed by a third-party vendor. In other words, even if you have opted for a customized pricing plan, you do not have complete control over the pricing, which is left solely in the hands of the vendor.

High-security risks: In SaaS cloud computing, your confidential and sensitive data is handled by the vendor, so there is a significant threat to your privacy.

Integration issues: Sometimes, wrong integration can cause a lot of trouble for your business. For example, if there are billing issues, wrong invoices can be generated. Therefore, it is imperative to sync data between SaaS and other applications. However, integration on the SaaS model is expensive and might require specialized IT professionals.

Selection of a SaaS vendor: There are thousands of SaaS applications for an IT team to choose from. You can always go with recommendations. However, reviews are sometimes biased, so they cannot assure you that you have selected the right service provider.

Hybrid infrastructure: The combination of on-premises or existing software with cloud-based software services is known as a hybrid infrastructure.

Pricing for SaaS

SaaS is sold through several pricing structures, so it helps to understand the common options before choosing a plan:

• Free or ad-based: It is free for users, with the SaaS provider generating revenue by upselling their advertising space. It is also possible to upgrade to a paid model without intrusive advertising.
• Flat rate: In this pricing model, customers are granted access to the software’s full features for a fixed monthly or annual fee.
• Per user: Here, the price is determined by how many people will use the service for each subscription. There is a fixed price for every user.
• Per-user tiers: These pricing tiers are based on a range of active users that can exist on a single subscription.
• Storage tiers: Customers may have free service access in this pricing structure. However, they will need to pay for storage space to continue using the product once it passes the free limit.
• Pay-as-you-go: This SaaS pricing model works on the number of customers. The more customers use the SaaS service, the more they are charged, and vice versa.
• Per active user: It builds on the “pay-as-you-go” method. The only significant difference is that you are billed only for users actively using the service beyond a specified threshold.
• Feature-based tiers: These pricing tiers are determined by the number of features the subscriber seeks. This model offers reduced software versions with limited features for a lower price.
• Freemium: The service is generally free in this tier. However, functional restrictions are designed to increase paid SaaS cloud service sales to existing customers.

Advantages of SaaS

Here are the main pros and benefits of the SaaS cloud computing model:

• Reduced deployment time helps in rapid prototyping.
• Many software providers use a SaaS model, yet may still earn a large share of revenue from the traditional model.
• SaaS solutions have a monthly subscription that includes upgrades, maintenance, and 24/7 client support, so there is no requirement for high up-front costs.
• The SaaS vendor helps you manage the complexity of the underlying IT infrastructure.
• Companies do not need to maintain hardware or worry about which operating system version is supported.
• SaaS solutions require only a web browser and internet access, and you are ready to go live because access is immediate.
• SaaS solutions can be accessed from anywhere in the world, offering mobility to users.
• It helps business organizations focus more on their sales and marketing efforts and ensure customer satisfaction.
• The SaaS provider updates and patches the application on an ongoing basis.

Disadvantages of SaaS

Here are the main cons and drawbacks of the SaaS cloud computing model:

• Data is stored in the cloud, so security may be a concern for some users; cloud computing is not always more secure than the on-premises model.
• In-house software applications give business owners a higher degree of control.
• Because SaaS software is web-hosted, you cannot use these applications without an Internet connection.
• SaaS applications can run at slightly slower speeds than client/server applications.

Popular SaaS Providers

Here are some leading SaaS providers:

• Office 365 provides an integrated experience of apps and services such as MS Word, Excel, and PowerPoint. It is updated monthly with the latest features and security updates.
• Google Workspace (formerly G Suite) is Google’s own cloud computing solution. This suite of tools provides email, word processing, spreadsheets, presentations, shared calendars, cloud storage, and many other cloud computing applications.
• Dropbox offers its cloud service for clients running on Windows, Mac, and Linux operating systems and mobile devices. It lets users drag and drop files from their desktop into their browser to upload them to Dropbox.
• Salesforce is a CRM solution that brings companies and customers together. It helps all departments share a single view of the customer.

Future of SaaS

We will likely see a higher adoption rate and a greater acceleration of features as companies design and develop new technologies to meet market demand.

Some companies predict a rebirth of SaaS technology focused heavily on mobile devices. Others are betting on artificial intelligence (AI), which is expected to dominate the SaaS market in logistics, transport, and retail.

As technology continues to evolve, SaaS models evolve with it. Even so, out-of-the-box and ready-made tools will always have a place in business.

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