What is SaaS? Software as a service guide

• What is SaaS?
• The history of SaaS
• 7 key features of modern SaaS products
• SaaS pricing models explained
• What’s the difference between SaaS, PaaS and IaaS?
• 5 reasons why you should use a SaaS-based CRM
• How to choose the right SaaS CRM for your business
• The future of SaaS
• Why businesses choose SaaS
• SaaS FAQ's

SaaS (Software as a Service) is a delivery model where software runs in the cloud and you can access it through the internet. The SaaS provider manages all the security, storage, and updates, while you pay a subscription to use the software.

SaaS is a relatively new concept in software delivery, but its roots go back to the mainframe era of the 1960s and 1970s, when computer terminals accessed centrally hosted applications.

The modern SaaS model didn’t appear until the late 1990s and early 2000s, when reliable internet access made it possible to deliver software through the browser rather than installing it on individual devices. Early SaaS tools included web-based email, CRM systems, and project management platforms.

Salesforce was one of the first major SaaS applications. Launched in 1999, it offered a fully web-based CRM that helped businesses manage customer relationships at scale.

These early applications faced challenges like slow internet speeds and limited bandwidth, but adoption grew as infrastructure improved and cloud computing matured. Remote servers, cheaper storage, and faster networks made SaaS easier to deploy and far more cost-effective than traditional on-premises software.

With software as a service, you don’t install and maintain software. Instead, you log in using the internet. The provider manages application security, access, storage, and performance. This empowers your IT department to spend more time on strategic work instead of software and hardware management.

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Several developments over the last decade have accelerated the growth of the SaaS delivery model. Here are some of the key factors that have shaped its rise:

1. Increased adoption: SaaS has become the dominant model for delivering software applications. Many organisations have shifted from traditional on-premises software to cloud-based SaaS solutions.
2. Cloud infrastructure: Cloud infrastructure has become more robust, with the major cloud providers (AWS, Microsoft Azure, Google Cloud) investing heavily in expanding their cloud services.
3. Mobile-first approach: With the increased usage and importance of mobile devices, SaaS providers continue to adopt a mobile-first approach.
4. Artificial intelligence (AI): SaaS providers are leveraging AI to provide advanced functionality, such as predictive analytics, natural language processing (NLP), and machine learning (ML).
5. Platformisation: SaaS providers have moved beyond providing standalone applications to creating platforms that enable third-party developers to build and deploy their applications on top of the SaaS infrastructure.
6. Integration: SaaS providers increasingly provide integrations with other applications and services, making it easier for users to connect and share data.
7. Data security: Security has become a top priority for SaaS providers, who strongly focus on providing leading-edge security features such as encryption, authentication, and access controls.

SaaS products are usually sold through flexible subscriptions that let businesses pick and choose the number of people and which features they need.

Using a subscription model spreads the costs of using the platform to a monthly or annual payment. This makes it easier for users to budget, upgrade, and adjust their plan as needed.

Below is a simple overview of the most common pricing approaches from SaaS applications.

As well as SaaS, you may have heard of PaaS and IaaS. Here are the key differences between the three service models.

1. SaaS (Software as a Service): SaaS provides fully functional applications through a web browser. The provider manages the application and all underlying infrastructure, including networks, servers, and storage. Users access the software without installing or maintaining anything themselves.
2. PaaS (Platform as a Service): PaaS offers a cloud-based platform for developers to build and deploy applications. It provides frameworks, tools, and development support while the provider manages the servers and networking.
3. IaaS (Infrastructure as a Service): IaaS delivers virtualised computing resources over the internet. Users control operating systems, applications, and data, while the provider manages the physical infrastructure.

These distinctions help determine the right cloud service based on business needs, technical skills, and resources. SaaS is best for ready-to-use solutions, PaaS for rapid app development, and IaaS for customisable IT infrastructure.

If cost reduction and business growth are priorities, a SaaS CRM gives your team the tools to work faster and stay connected without the overhead of traditional software.

Here are five key reasons why a SaaS based CRM might be the best choice for your business:

There are now many SaaS platforms that are intelligent and industry-specific, and they continue to automate more of the work teams do every day. Key trends shaping the future of SaaS include:

• AI-driven personalisation: SaaS tools are now able to tailor dashboards, recommendations, and workflows based on each user’s behaviour.
• Autonomous agents: Instead of waiting for human prompts, AI agents are able to complete tasks and collaborate with other systems in the background.
• Vertical SaaS: More industry-specific platforms will emerge, offering built-in compliance, tailored features, and workflows designed for sectors like healthcare, finance, retail, and government.
• Stronger security: As cyber threats grow, SaaS providers will continue to deliver deeper real-time threat detection, tighter identity controls, and stronger data governance.
• Data-as-a-Service (DaaS): More providers will offer direct access to real-time, actionable data without the need for internal infrastructure, helping teams make faster, more informed decisions.