SaaS vs. SaaS is the highest level of abstraction in cloud service models. Along with platform as a service and software as a service (SaaS), IaaS is one of the three basic types of cloud computing services (PaaS). Platform as a Service means that the server’s operating system is managed by the vendor, and the client only has control over the applications. SaaS vs. Get to know Google App Engine. Logging as a service (🌐 LaaS) is a combination of 💻 SaaS (software as a service) and 🛠️ PaaS (platform as a service). PaaS (Platform as a Service): PaaS products allow businesses and developers to host, build, and deploy consumer-facing apps. IaaS often offers pay-as-you-go pricing models, allowing you to scale your expenses based on usage. IaaS, PaaS, and SaaS aren’t entirely separate concepts. ; PaaS: Ideal for developers who want to build applications without worrying about the underlying infrastructure but wish to maintain some level of control. Published: 20 Dec 2021 There are three major cloud service models: software as a service ( SaaS ), infrastructure as a service ( IaaS) and platform as a service ( PaaS ). 4% to total $678. XaaS (Anything as a Service): XaaS is a general, collective term that refers to the delivery of anything as a service. Application. It is a great option for businesses that don’t have the staff or bandwidth to handle software installation and updates. To conclude, in this post we saw three as-a-service paradigms: Infrastructure, Platform, and Software. IaaS offers access to computing resources like servers, storage, and networks. 6 billion in 2023, according to the latest forecast from Gartner, Inc. With SaaS, you tradeoff loss of control, security, and performance in exchange for time and maintenance savings. PaaS provides on-demand quick provisioning of platform software or middleware execution environment such as message queue, relational database management systems and container orchestration systems. It is also recommended for applications that are not used daily. The Pizza-as-a-Service metaphor was firstly introduced by Albert Barron in 2014 as a visualization of the differences between Infrastructure-as-a-service (IaaS), Platform-as-a-service (PaaS) and Software-as-a-service (SaaS). If you don’t already have a logging standard, here is some help understanding why you need one and what LaaS can. The resources that are available through SaaS are. In Summary. Understanding the differences between these service models is essential for. SaaS PaaS and IaaS A Quick Comparison - Cloud computing is an advancing idea in the realm of IT. Among its benefits, we can mention: high scalability. SLAs can differ for every single type of service provided, but they can be broadly classified into three main types. The IaaS is a service model. DaaS. You as a user could be restricted to specific performance, integrations, and functionalities as. IaaS allows multiple users to share the same physical infrastructure. Today, SaaS is the leading Cloud computing service, accounting for 39. PaaS: Platform as a Service. 6 min read · Aug 31, 2021 -- As technology develops, new variations of cloud computing services pop up. To explore the differences between IaaS, PaaS, and SaaS, consider these terms under the umbrella of cloud computing and in the order in which we have described them. The trend shows that. 3 with a $11 billion annual. IaaS, PaaS, and SaaS are popular types of cloud service models. complete control over the infrastructure. PaaS vs. SaaS, Software as a Service. SaaS-based businesses lose control over the data since it is managed by a particular third-party vendor. SaaS Examples. The PaaS model goes a step further by allowing companies to give up managing everything except data and applications, while the SaaS model completes the transition away from the on-premise IT system and leaves. The SaaS Market: Facts and Trends 12PaaS (Platform as a Service) and Server-less Computing. These easily confusable abbreviations stand for: Infrastructure as a Service (IaaS) Platform as a Service (PaaS) Software as a Service (SaaS) “As a service” simply means a facility, usually related to IT, computing, or. The trend shows that there is a slight decrease in SaaS, and a slight increase in IaaS and PaaS, which is likely to continue over the next years. Knowing exactly what PaaS entails is vital when comparing PaaS vs. I'm grateful for Coursera and all the…Microsoft has begun rolling out the Windows 10 incarnation of its Copilot tool to Windows Insiders in the Release Preview Channel. The following are five of the top advantages of using SaaS: 1. g. The basis of PaaS vs IaaS comparison is that PaaS applications are cloud-ready, and IaaS solutions are cloud-native. LaaS, PaaS, CaaS, IaaS, FaaS, and SaaS Explained. AWS approaches Software-as-a-Service (SaaS) as a business and software delivery model that enables organizations to provide their offering to customers in a low-friction and service-centric manner. It allows you to build custom applications entirely online. Iaas sells products analogous to hardware like VMs. That’s the difference. Each cloud service model covers different user and company needs, and provides a different level of control, security and scalability. Software as a service (SaaS) differs from the traditional model because the software (application) is already installed and configured. Understanding the differences between PaaS vs. Software as a service (SaaS) allows users to connect to and use cloud-based apps over the Internet. Worldwide end-user spending on public cloud services is forecast to grow 20. 14. With IaaS, companies control their own computing, networking, and storing components without having to manage them on-premises physically. Software as a Service explained. Most modern SaaS platforms are built on IaaS or PaaS platforms. . If you use the Virtual Servers of Rackspace or Amazon Cloud, you will be actually using Iaas. SaaS. IaaS vs. In fact, email services such as Gmail and Hotmail are examples of cloud-based SaaS services. The IaaS is a cloud application service that allows users to pay for the services they use. Platform as a service (PaaS) involves a third party providing a framework for a team of software developers to create and manage customized applications. They are sometimes called cloud service offerings, cloud computing service models, or cloud infrastructure models. They experience about 86% positive ratings from the total customer interactions and feedback. Specifically, the level of system administration knowledge gradually decreases as follows: Amazon IaaS > PaaS > SaaS. IaaS, PaaS and SaaS are the three most popular types of cloud service offerings. The Shared Responsibility Model for Security in The Cloud (IaaS, PaaS & SaaS) By Muhammad Raza April 07, 2023. Today I started learning about not just SaaS but IaaS and PaaS as well. Platform as a service (PaaS) is a proven model for running applications without the hassle of maintaining on-premises hardware and software infrastructure at your company. IaaS (Infrastructure as a Service): IaaS products allow organizations to manage their business resources — such as their network, servers, and data storage — on the cloud. Image Source: BMC. You might also hear IaaS, PaaS, and SaaS called cloud service offerings or cloud computing categories, but all of these terms refer to how you use the cloud. The main confusion stems from the fact that many equate “cloud computing” with “online services,” which is, of course, nonsense. Amazon Web Services. In a nutshell, SaaS offers convenience and accessibility for end users, PaaS provides developers with a platform for creating applications, and IaaS offers flexible infrastructure options. Standard interfaces and security protocols —such as SSL, IPSEC, SFTP, LDAPS, SSH, SCP, SAML, OAuth, etc. With PaaS solutions, you control the application and data while the service provider manages the rest of the stack. PaaS vs. A SaaS model provides cloud-based tools and applications to consumers and businesses, whereas a PaaS model allows them to host, manage, and secure their own applications and IaaS allows organizations to manage their business resources like network, server, and data storage. The increasing popularity of IaaS, PaaS, and SaaS has reduced the need for on-premise hosting. SaaS is just one aspect of the myriad locations where modern data and applications can be found. Microsoft Azure. With so many vendors, platforms, tools and services that fall under IaaS, PaaS and SaaS categories, enterprises need to understand the sliding. Common examples are email, calendaring, and office tools (such as Microsoft Office 365). Point out the wrong statement. It supports the most obscure ancient formats up to the cutting edge. 1. SaaS vendors commonly host applications and data on their own servers and databases, or utilize the servers of a third-party cloud provider. Start planning your hybrid cloud strategy. Reiterating the biggest difference between SaaS and cloud-based services, SaaS is only one part of the larger Cloud. All the company has to worry about is bringing its data to the system or interacting with an application. These cloud services are hosted in gigantic datacenters. SaaS is also the easiest to maintain because the cloud providers manage everything. C loud security incidents are skyrocketing. SaaS uses the web to deliver applications that are managed by a third-party vendor and whose interface is accessed on the. Saas: Software As A Service. Users can log into and use a SaaS application from any compatible device over the Internet. Unlike SaaS and IaaS, it refers to only networking hardware, software, and services delivered in a “cloud-like” motion, which implies subscription-based or consumption-based billing. IaaS vs. Affordability. A SaaS program is usually purchased in the form of a subscription. SaaS, PaaS and IaaS are the 3 main types of cloud “as a service” options. Customization. SaaS is one of three main categories of cloud computing, alongside infrastructure as a Service (IaaS) and Platform as a Service (PaaS). The distinction between these tools largely depends on what providers and users are each responsible for. RACE is managed by the Defense Information Systems Agency (DISA), a government service provider that supplies and supports battlefield. SaaS users subscribe to an application rather than purchasing it once and installing it. In most circumstances, a SaaS solution will offer a substantially more accessible, flexible and affordable alternative to a PaaS platform. Iaas stands for Infrastructure as a service. Create/Deploy applications on the fly. These three services (SaaS, PaaS, and IaaS) provide the different ways of usage of cloud for an organization. DaaS. PAAS is used by developers. It facilitates the use of software. SaaS, or software as a service, is the most comprehensive cloud computing service, delivering an entire SaaS application, managed by a vendor, through a web browser. The main difference between IaaS and PaaS, which we’re going to cover in a second, is that IaaS clients are responsible for managing applications, runtime, OSes, middleware, and data. §SaaS vendors are now providing greater integration capabilities instead of redirecting their customers to third parties. IaaS is a cloud computing infrastructure that provides compute, network, and storage resources over the internet, via a subscription model that can scale. Identify appropriate use cases for each cloud service (IaaS, PaaS, SaaS). SaaS: Main Differences. What is PaaS. Difference between SaaS, PaaS, and IaaS. On the other hand, PaaS allows you to manage your data and applications only, and with SaaS, everything is managed by your service provider. Iaas allows IT users to access resources over the internet. Infrastructure as a Service (IaaS) provides access to virtualized compute resources, such as servers. The National Institute of Standards and Technology (NIST) recognizes three standard cloud computing models of as-a-service: Infrastructure-as-a-Service (IaaS), Platform-as-a-Service (PaaS), and Software-as-a-Service (SaaS). Types of cloud computing. At first sight it looks brilliant — but if you look in depth, it falls apart. Public arts funding suffered a decline during fiscal year 2021 due to constrained resources during the pandemic. scalability, cost model, disaster recovery) while maintaining a large degree of control. SaaS products are usually hosted in the cloud and accessed from a web browser or mobile device. IaaS is where the infrastructure is built. Platform-as-a-Service (PaaS) – In the cloud computing service model, this is the next layer up from IaaS. Hosted software. IaaS. " IaaS vs. key characteristics of the SaaS model across the board. Developers can make use of cloud hosted APIs to build out new applications, accessing and manipulating data programmatically. Trust boundaries —between the different services and components deployed on the cloud. PaaS: If you require a computing system that allows multiple team members to work on one project, then the best choice may be PaaS. W hen talking about the topic of cloud computing services, you must have heard of these concepts, Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and. PaaS differs from SaaS in that, rather than providing a single use case to subscribers, it delivers an accessible platform (including things like development tools, database management systems, servers, storage, and networking solutions) that enables. Another angle: 80% of business organizations experienced at least one cloud security breach incident last year. e. "Similarly, SaaS providers move 'down the stack' to provide their customers the ability to create custom solutions that integrate tightly with their core software systems. Nonetheless, they must ensure user access is sufficiently protected. , as they would with IaaS and PaaS. 8. SaaS, on the other hand, refers to cloud-based software that companies may buy and use. Best examples of SaaS, PaaS, and IaaS. SaaS deployments are highly scalable, cost effective, and usually offer enterprise-grade security, automated data backups, and distributed servers ensuring high availability. 15. Multiple users from 10 – 10,000 can have access to the same software. Understanding each type of service and how they are different can help you. According to a Gartner report, the IaaS market in the US is projected to reach $126 billion by the end of 2022. IaaS offers on-demand access to cloud-hosted virtual and physical servers, storage, and networking. SaaS spans across a variety of online applications utilized through the internet every day. Gartner reports that SaaS solutions currently have the largest market share, continuing to push out traditional on-premise licensed software. Cloud computing services are mainly categorized into three types: infrastructure as a service (IaaS), platform as a service (PaaS), and software as a service (SaaS). Common examples are email, calendaring, and office tools (such as Microsoft Office 365). IaaS, PaaS, and SaaS are essentially the three main pillars of cloud computing. A strong No. IaaS vendors offer the most powerful storage and networking technology to satisfy the needs of their customers. Three Common Cloud Service Models. IaaS and PaaS vs SaaS. Introduction to security for SaaS, PaaS, and IaaS min. IaaS vs. In a SaaS model, security and disaster recovery apply to the application, related data and the infrastructure. PaaS environments share many of the security concerns we see in the SaaS model; however, several security risks are unique to PaaS. With a CaaS service, the cloud service provider manages the container engine. IaaS, PaaS, and FaaS services have similar purposes: they help companies manage applications cheaper and more effectively. serverless debate is proof enough. The software or application needed has to be downloaded in SAAS, whereas in PAAS, the application is built by the user. Mengenal Layanan Saas, Paas, dan Iaas. Software as a Service works through a cloud delivery model. 3 billion, up from $92. Figure by the author. [2] Large clouds often have functions distributed over multiple locations, each of which is a data center. PaaS (Platform as a Service) providers sell access to everything a customer would need to develop an app. Experience with hybrid and cloud implementations. SaaS: Software as a Service. b) In the deployment model, different cloud types are an expression of the manner in which infrastructure is deployed. IaaS provides you the most freedom of control as it lets you manage your applications, data, middleware, and operating system. Infrastructure as a Service, sometimes abbreviated as IaaS, contains the basic building blocks for cloud IT and typically provide access to networking features, computers (virtual or on dedicated hardware), and data storage space. Data Storage: Data is routinely saved in the cloud. SaaS (Software as a Service) is the most frequently used of these terms. Whereas SaaS offers ready-to-use solutions that meet a specific business need. The public cloud provider manages all the hardware and traditional. SaaS, on the other hand, is a software delivery. Most importantly, they. Cloud application services, or Software as a Service (SaaS), represent the largest cloud market and are still growing quickly. Uses: IAAS is used by network architects. While SaaS is currently the largest cloud service in terms of spend, IaaS is currently projected to be the fastest. CaaS is good for IaaS situations where developers want to enjoy the convenience of container orchestration as well. There are three common types of cloud computing services: IaaS (Infrastructure-as-a-Service), PaaS (Platform-as-a-Service), and SaaS (Software-as-a-Service). SaaS: Software as a Service. As a Service: The basics. PaaS is. by Hanna Barabakh. It refers to complete software that can be used in return for a recurring subscription fee. SaaS lets them work together to craft documents, discuss images or analyze data. Depending on your need for flexibility and customization, each model has its pros and cons. The IaaS, PaaS, and SaaS acronyms stand for infrastructure, platform, or software as a service and systems. Infrastructure-as-a-Service, commonly referred to as simply “IaaS,” is a form of cloud computing that delivers fundamental compute, network, and storage resources to consumers on-demand, over the internet, and on a pay-as-you-go basis. Software as a Service works through a cloud delivery model. Analyze and mine data for business analytics. They each have their own pros and cons, and the difference between them is the level of abstraction they offer the end-user. PaaS a cloud-based service provides businesses with the hardware, and software tools that can be accessed through the web. Platform as a service, commonly known as PaaS, is defined as a cloud solution wherein third-party vendors deliver remotely hosted products and services over the internet. PaaS is very similar to SaaS, with one key difference: your internal development team manages the ecommerce application code. During a SaaS interview, the hiring manager is likely to ask you questions about your skills, experiences and your opinion on the future of their business or the industry. IaaS services can host websites and software solutions, build virtual data centers for large-scale enterprises, and conduct data mining and analysis. ) Techniques used for token management —authentication, and authorization. SaaS business applications are usually accessed by users using a thin client via a web browser. PaaS stands for Platform-as-a-Service. 👉Subscribe to our new channel:this video Three types of service models of cloud discussed with real life. SaaS: Software as a Service. 21 billion by the end of 2022 (Research and Markets). “Cloud has become essentially indispensable,” said Sid Nag. Platform as a service. Advanced experience and knowledge in identity and access, platform protection, security operations, securing data, and securing applications. PaaS vs. There are 4 different types of cloud computing services. SaaS. The chance of errors is very less in SAAS, and if anything happens, the service providers take care of the same. In contrast, PaaS is a. Any business owner — or just an ordinary person — can use software (Software as a Service), a platform for developing (Platform as a Service) or a whole infrastructure (Infrastructure as a Service in the cloud. Their low prices also make them one of the top software developers or engineers’ options. Let us know in the comments below. Some SaaS vendors also provide a discrete PaaS that allows third parties to customize the SaaS offering. IaaS, PaaS, and SaaS – you’ve probably seen the acronyms for these cloud computing service models bounded around a lot lately. Many cloud computing services offer varying features and degrees of operational management depending on the service you consume. SaaS full form is Software as a Service. Finally, SaaS requires the least of your team. How do cost structures differ between IaaS, PaaS, and SaaS? Answer: IaaS typically follows a pay-as-you-go model based on actual usage. Since a third-party vendor manages the SaaS service, performance and security are all dependent on them. 1. Customer-based SLA: A customer-based SLA is between a service provider and a customer or. When a SaaS database is designed for the cloud, it can take maximum advantage of cloud elasticity and the disaggregation of compute and storage resources. 6. It handles all the nitty-gritty of infrastructure, so they can focus purely on creating amazing apps. The cloud market share between the PaaS, IaaS, and SaaS shows that SaaS is the clear leader, with IaaS in second place, according to the latest data from Gartner. It runs like software, but it can be used as a platform to support your entire logging infrastructure. SaaS also doesn't require any server maintenance. The 3 main types of cloud services: IaaS vs PaaS vs SaaS. These business models can be classified and. offers banking-software-as-a-service (via the B-SaaS brand), data management, and consulting solutions. 4% to total $678. SaaS vs. IaaS is ideal if you want the benefits of the cloud (e. Software as a Service (SaaS). IaaS, PaaS, and SaaS aren’t entirely separate concepts. Rapid Access Computing Environment (RACE) is a United States federal government infrastructure-as-a-service ( IaaS ) initiative for developing and testing new Department of Defense (DoD) software applications. SaaS: Software as a Service. The leading service in the cloud computing industry is SaaS with a 39. For instance, say your company already has an IT infrastructure. SaaS. With IaaS, you have full control because you rent (not own) the infrastructure. [2] Large clouds often. Infrastructure as a Service (IaaS) provides access to virtualized compute resources, such as servers. A hybrid cloud is ________________. SOFTWARE AS A SERVICE. More and more, applications that are being offered as both SaaS and on-premises versions are seeing their on-premises versions being retired. IaaS (Infrastructure as a Service) is the building block for cloud-based computing. Characteristics of SaaS. Infrastructure-as-a-Service offers a pay-as-you-go approach for storage, networking, and virtualization. If Falcon Security wished to install some of its own. Here is a visual breakdown of these cloud services: Cloud Services. There are three main types of cloud computing services: IaaS: Infrastructure as a Service. The 7 Main Benefits of Platform-as-a-Service (PaaS) Among other benefits, PaaS allows users to: Get their products to market faster and gain a competitive edge. SaaS is delivered through the internet as a full functional service, accessible via any web browser. Iaas users have complete control over their infrastructure and can customize it to their specific needs. Paas Vs IaaS. The actual application runs in cloud servers that may be far. IaaS vs PaaS vs SaaS. Which of the following are additional cloud services? Select all that apply. It focuses on helping developers with better functionalities for easily. PaaS is used by developers; IaaS is suitable for system administrators, while SaaS is used by end-users. 6 billion in end-user spending in 2022. The term SaaS first appeared in late 2006 as a marketing term. For example, PaaS allows developers to create custom applications using an API deployed in the cloud. Platform as a service (PaaS) allows developers to build apps without having to host them themselves, whereas SaaS refers. SaaS services can be monetized in many different ways. SaaS. It allows businesses to access the resources they need without depending on their own servers. It is a software in which the applications are hosted by a cloud service provider. §White labeling of SaaS solutions has become increasingly prominent. Jul 19, 2020. IaaS is typically used for computing, storage, and networking, while PaaS is used for application development and deployment. DaaS. It’s a foundational cloud service that can build or complement platform as a service (PaaS) and SaaS. The host provides the infrastructure while the customer manages software. The 3 main cloud computing models: Infrastructure-as-a-Service (IaaS), Platform-as-a-Service (PaaS), and Software-as-a-Service (SaaS) allow you to outsource varying degrees of computing work and hardware maintenance to a cloud provider like Amazon or Microsoft. SaaS providers manage both infrastructure and software applications. IaaS: Definitions and Differences. DaaS. Worldwide end-user spending on public cloud services is forecast to grow 20. c) AaaS provides virtual machines, operating systems, applications, services. PaaS (Platform as a Service) providers sell access to everything a customer would need to develop an app. SaaS solutions are beneficial in a variety of business scenarios:Usability. SAAS: Software As A Service (SAAS) allows users to run existing online applications and it is a model software that is deployed as a hosting service and is accessed over Output Rephrased/Re-written Text the internet or software delivery model during which software and its associated data are hosted centrally and accessed using their client, usually an online browser over the web. SaaS Pros, Cons and Use Cases. The “as-a-Service” model of cloud computing, providing services over the internet, is a trend that continues to gain traction across the globe. Instead, they store data on the servers of IaaS providers, and use a dashboard or API (application programming interface) to access and manage their. Users can access these applications with the help of internet connection and web browser. SaaS applications work through the cloud delivery model. PaaS and SaaS share the same mode of delivery. Infrastructure as a service (IaaS) is defined as the use of any IT hardware and software infrastructure components like compute power or storage utilized through the cloud in a flexible consumption or subscription-based model. On-demand software. 3 billion by 2026, at a CAGR of 16. Companies often choose SaaS when they lack sophisticated internal IT capabilities and are looking to have a simple, straightforward tool designed for a specific purpose. SaaS provides businesses with tools for enterprise resourcing planning (ERP), content management, identity and access management (IAM), customer relationship management (CRM), security, etc. PaaS and SaaS share the same mode of delivery. SaaS. In other words, instead of buying the software and installing it on their own computers, businesses can use SaaS apps to run applications from remote servers hosted by service providers. There are 3 main types of cloud computing as-a-service options and each one covers a degree of management for you: infrastructure-as-a-service (IaaS), platform-as-a-service (PaaS), and software-as-a-service (SaaS). IaaS offers on-demand access to cloud-hosted virtual and physical servers, storage, and networking. With IaaS, users have complete control over their infrastructure and the software and tools associated. by Hanna Barabakh. SaaS Market Share. Platform as a Service vs. PaaS has around 32% and is expected to be the most important model. IaaS vs PaaS vs SaaS. 1% annually and reach $220. Understanding each type of service and how they are different can help you. Difference between aPaaS and IaaS. Saas: Software As A Service. Gartner expects steady velocity within this segment as enterprises take multiple routes to market with SaaS, for example via cloud marketplaces, and continue to break up larger, monolithic applications into composable. In a nutshell, PaaS gives users all the tools and infrastructure required to build the software that they want. No two services are the same, but they share similar characteristics. The National Institute of Standards and Technology (NIST) recognizes three standard cloud computing models of as-a-service: Infrastructure-as-a-Service (IaaS), Platform-as-a-Service (PaaS), and. We’ll also help you understand the key. The service provider can be internal (such as the legal department or IT Helpdesk) or external (such as a hosting provider, a SaaS supplier or a backup service provider). §Enhanced mobile optimization is becoming a top priority. This tutorial is an excerpt from a book written by Florian Klaffenbach, Markus Klein, Suresh Sundaresan titled Multi. The platform has since been expanded to support its 50 th service integration, which we expect will accelerate further during 2024. INFRASTRUCTURE AS A SERVICE. This system has been set up by cloud service providers across the globe. With SaaS, vendors manage the data, servers and storage, ultimately eliminating the need for IT review and streamlining business processes. Prerequisites. AWS EC2, Rackspace. IaaS is the closest to the on-prem model, with companies managing everything except the physical infrastructure. The biggest difference between the two is the magnitude with which cloud-based can be utilized. Find out differences between SaaS, PaaS, and IaaS. While each has its. Cloud computing menawarkan kemudahan dimana kamu dapat menyimpan atau mengakses data dari berbagai lokasi secara online. SaaS vs. Software as a Service (SaaS) SaaS is also known as "on-demand software". While SaaS gives you a complete service for immediate, on-demand use, PaaS gives you the tools to develop the service you need. I will introduce them more specifically in the following context. SaaS vs. We’ve recently covered SaaS security in a separate article. Unlike traditional software, where a customer pays once for a perpetual license plus, often, fees for maintenance and updates, SaaS users pay on a subscription basis for. Store, maintain, and manage a business’s database. Cloud computing has also proven to be one of the most important environmentally sustainable technological innovations in. Software-as-a-Service (SaaS) Infrastructure-as-a-Service. One of the key differences between IaaS, PaaS, and SaaS is the fact that the client is responsible for managing applications, runtime, middleware, and data, although IaaS providers still manage the hard drives, networking, servers, virtualisation, and storage. However, the disadvantage of PaaS is that it is not quite flexible when compared to IaaS. Software as Service (SaaS) SaaS handles hosting, security, server uptime and other technical processes.