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    Key differencesCommon examples of SaaS, PaaS, & IaaSSaaS: Software as a ServiceSaaS DeliverySaaS AdvantagesSaaS CharacteristicsWhen to Use SaaSSaaS Limitations & ConcernsExamples of SaaSPaaS: Platform as a ServicePaaS DeliveryPaaS AdvantagesPaaS CharacteristicsWhen to Use PaaSPaaS Limitations & ConcernsExamples of PaaSIaaS: Infrastructure as a ServiceIaaS DeliveryIaaS AdvantagesIaaS CharacteristicsWhen to Use IaaSIaaS Limitations & ConcernsExamples of IaaSXaaS: Everything as a ServiceRelated readingWhat is any proprietary software?What is a proprietary operating system?What are the two types of system software?What is another term for the operating system a computer uses?

The cloud is a hot topic for small businesses all the way to global enterprises, but remains a broad concept that covers a lot of online territory. As you begin to consider switching your business to the cloud, whether it be for application or infrastructure deployment, it is more important than ever to understand the differences and advantages of the various cloud services.

Though as-a-service types are growing by the day, there are usually three models of cloud service to compare:

    Software as a Service (SaaS)Platform as a Service (PaaS)Infrastructure as a Service (IaaS)

For each of these, we’ll look the concept, benefits, and variances. We’ll also help you understand the key differences among SaaS, PaaS, and IaaS—so you can best choose one for your organization.

(More interested in cloud setup? Learn more about public, private, and hybrid cloud differences.)

Key differences

Common examples of SaaS, PaaS, & IaaS

Platform Type Common Examples SaaS Google Workspace, Dropbox, Salesforce, Cisco WebEx, Concur, GoToMeeting PaaS AWS Elastic Beanstalk, Windows Azure, Heroku, Force.com, Google App Engine, Apache Stratos, OpenShift IaaS DigitalOcean, Linode, Rackspace, Amazon Web Services (AWS), Cisco Metapod, Microsoft Azure, Google Compute Engine (GCE)

SaaS: Software as a Service

Software as a Service, also known as cloud application services, represents the most commonly utilized option for businesses in the cloud market. SaaS utilizes the internet to deliver applications, which are managed by a third-party vendor, to its users. A majority of SaaS applications run directly through your web browser, which means they do not require any downloads or installations on the client side.

SaaS Delivery

Due to its web delivery model, SaaS eliminates the need to have IT staff tải về and install applications on each individual computer. With SaaS, vendors manage all potential technical issues, such as data, middleware, servers, and storage, resulting in streamlined maintenance and support for the business.

SaaS Advantages

SaaS provides numerous advantages to employees and companies by greatly reducing the time and money spent on tedious tasks such as installing, managing, and upgrading software. This frees up plenty of time for technical staff to spend on more pressing matters and issues within the organization.

SaaS Characteristics

There are a few ways to help you determine when SaaS is being utilized:

    Managed from a central locationHosted on a remote serverAccessible over the internetUsers not responsible for hardware or software updates

When to Use SaaS

SaaS may be the most beneficial option in several situations, including:

    Startups or small companies that need to launch ecommerce quickly and don’t have time for server issues or softwareShort-term projects that require quick, easy, and affordable collaborationApplications that aren’t needed too often, such as tax softwareApplications that need both web and mobile access

SaaS Limitations & Concerns

    Interoperability. Integration with existing apps and services can be a major concern if the SaaS app is not designed to follow open standards for integration. In this case, organizations may need to design their own integration systems or reduce dependencies with SaaS services, which may not always be possible.Vendor lock-in. Vendors may make it easy to join a service and difficult to get out of it. For instance, the data may not be portable–technically or cost-effectively–across SaaS apps from other vendors without incurring significant cost or inhouse engineering rework. Not every vendor follows standard APIs, protocols, and tools, yet the features could be necessary for certain business tasks.Lack of integration support. Many organizations require deep integrations with on-premise apps, data, and services. The SaaS vendor may offer limited support in this regard, forcing organizations to invest internal resources in designing and managing integrations. The complexity of integrations can further limit how the SaaS app or other dependent services can be used.Data security. Large volumes of data may have to be exchanged to the backend data centers of SaaS apps in order to perform the necessary software functionality. Transferring sensitive business information to public-cloud based SaaS service may result in compromised security and compliance in addition to significant cost for migrating large data workloads.Customization. SaaS apps offer minimal customization capabilities. Since a one-size-fits-all solution does not exist, users may be limited to specific functionality, performance, and integrations as offered by the vendor. In contrast, on-premise solutions that come with several software development kits (SDKs) offer a high degree of customization options.Lack of control. SaaS solutions involves handing control over to the third-party service provider. These controls are not limited to the software–in terms of the version, updates, or appearance–but also the data and governance. Customers may therefore need to redefine their data security and governance models to fit the features and functionality of the SaaS service.Feature limitations. Since SaaS apps often come in a standardized form, the choice of features may be a compromising tradeoff against security, cost, performance, or other organizational policies. Furthermore, vendor lock-in, cost, or security concerns may mean it’s not viable to switch vendors or services to serve new feature requirements in the future.Performance and downtime. Because the vendor controls and manages the SaaS service, your customers now depend on vendors to maintain the service’s security and performance. Planned and unplanned maintenance, cyber-attacks, or network issues may impact the performance of the SaaS app despite adequate service level agreement (SLA) protections in place.

Examples of SaaS

Popular examples of SaaS include:

    Google Workspace (formerly GSuite)DropboxSalesforceCisco WebExSAP ConcurGoToMeeting

PaaS: Platform as a Service

Cloud platform services, also known as Platform as a Service (PaaS), provide cloud components to certain software while being used mainly for applications. PaaS delivers a framework for developers that they can build upon and use to create customized applications. All servers, storage, and networking can be managed by the enterprise or a third-party provider while the developers can maintain management of the applications.

PaaS Delivery

The delivery model of PaaS is similar to SaaS, except instead of delivering the software over the internet, PaaS provides a platform for software creation. This platform is delivered via the web, giving developers the freedom to concentrate on building the software without having to worry about operating systems, software updates, storage, or infrastructure.

PaaS allows businesses to design and create applications that are built into the PaaS with special software components. These applications, sometimes called middleware, are scalable and highly available as they take on certain cloud characteristics.

PaaS Advantages

No matter the size of your company, using PaaS offers numerous advantages, including:

    Simple, cost-effective development and deployment of appsScalableHighly availableDevelopers can customize apps without the headache of maintaining the softwareSignificant reduction in the amount of coding neededAutomation of business policyEasy migration to the hybrid model

PaaS Characteristics

PaaS has many characteristics that define it as a cloud service, including:

    Builds on virtualization technology, so resources can easily be scaled up or down as your business changesProvides a variety of services to assist with the development, testing, and deployment of appsAccessible to numerous users via the same development applicationIntegrates web services and databases

When to Use PaaS

Utilizing PaaS is beneficial, sometimes even necessary, in several situations. For example, PaaS can streamline workflows when multiple developers are working on the same development project. If other vendors must be included, PaaS can provide great speed and flexibility to the entire process. PaaS is particularly beneficial if you need to create customized applications.

This cloud service also can greatly reduce costs and it can simplify some challenges that come up if you are rapidly developing or deploying an app.

PaaS Limitations & Concerns

    Data security. Organizations can run their own apps and services using PaaS solutions, but the data residing in third-party, vendor-controlled cloud servers poses security risks and concerns. Your security options may be limited as customers may not be able to deploy services with specific hosting policies.Integrations. The complexity of connecting the data stored within an onsite data center or off-premise cloud is increased, which may affect which apps and services can be adopted with the PaaS offering. Particularly when not every component of a legacy IT system is built for the cloud, integration with existing services and infrastructure may be a challenge.Vendor lock-in. Business and technical requirements that drive decisions for a specific PaaS solution may not apply in the future. If the vendor has not provisioned convenient migration policies, switching to alternative PaaS options may not be possible without affecting the business.Customization of legacy systems. PaaS may not be a plug-and-play solution for existing legacy apps and services. Instead, several customizations and configuration changes may be necessary for legacy systems to work with the PaaS service. The resulting customization can result in a complex IT system that may limit the value of the PaaS investment altogether.Runtime issues. In addition to limitations associated with specific apps and services, PaaS solutions may not be optimized for the language and frameworks of your choice. Specific framework versions may not be available or perform optimally with the PaaS service. Customers may not be able to develop custom dependencies with the platform.Operational limitation. Customized cloud operations with management automation workflows may not apply to PaaS solutions, as the platform tends to limit operational capabilities for end users. Although this is intended to reduce the operational burden on end users, the loss of operational control may affect how PaaS solutions are managed, provisioned, and operated.

Examples of PaaS

Popular examples of PaaS include:

    AWS Elastic BeanstalkWindows AzureHerokuForce.comGoogle App EngineOpenShift

IaaS: Infrastructure as a Service

Cloud infrastructure services, known as Infrastructure as a Service (IaaS), are made of highly scalable and automated compute resources. IaaS is fully self-service for accessing and monitoring computers, networking, storage, and other services. IaaS allows businesses to purchase resources on-demand and as-needed instead of having to buy hardware outright.

IaaS Delivery

IaaS delivers cloud computing infrastructure, including servers, network, operating systems, and storage, through virtualization technology. These cloud servers are typically provided to the organization through a dashboard or an API, giving IaaS clients complete control over the entire infrastructure. IaaS provides the same technologies and capabilities as a traditional data center without having to physically maintain or manage all of it. IaaS clients can still access their servers and storage directly, but it is all outsourced through a “virtual data center” in the cloud.

As opposed to SaaS or PaaS, IaaS clients are responsible for managing aspects such as applications, runtime, OSes, middleware, and data. However, providers of the IaaS manage the servers, hard drives, networking, virtualization, and storage. Some providers even offer more services beyond the virtualization layer, such as databases or message queuing.

IaaS Advantages

IaaS offers many advantages, including:

    The most flexible cloud computing modelEasy to automate deployment of storage, networking, servers, and processing powerHardware purchases can be based on consumptionClients retain complete control of their infrastructureResources can be purchased as-neededHighly scalable

IaaS Characteristics

Characteristics that define IaaS include:

    Resources are available as a serviceCost varies depending on consumptionServices are highly scalableMultiple users on a single piece of hardwareOrganization retain complete control of the infrastructureDynamic and flexible

When to Use IaaS

Just as with SaaS and PaaS, there are specific situations when IaaS is most advantageous.

    Startups and small companies may prefer IaaS to avoid spending time and money on purchasing and creating hardware and software.Larger companies may prefer to retain complete control over their applications and infrastructure, but they want to purchase only what they actually consume or need.Companies experiencing rapid growth like the scalability of IaaS, and they can change out specific hardware and software easily as their needs evolve.

Anytime you are unsure of a new application’s demands, IaaS offers plenty of flexibility and scalability.

IaaS Limitations & Concerns

Many limitations associated with SaaS and PaaS models – such as data security, cost overruns, vendor lock-in and customization issues – also apply to the IaaS model. Particular limitations to IaaS include:

    Security. While the customer is in control of the apps, data, middleware, and the OS platform, security threats can still be sourced from the host or other virtual machines (VMs). Insider threat or system vulnerabilities may expose data communication between the host infrastructure and VMs to unauthorized entities.Legacy systems operating in the cloud. While customers can run legacy apps in the cloud, the infrastructure may not be designed to deliver specific controls to secure the legacy apps. Minor enhancement to legacy apps may be required before migrating them to the cloud, possibly leading to new security issues unless adequately tested for security and performance in the IaaS systems.Internal resources and training. Additional resources and training may be required for the workforce to learn how to effectively manage the infrastructure. Customers will be responsible for data security, backup, and business continuity. Due to inadequate control into the infrastructure however, monitoring and management of the resources may be difficult without adequate training and resources available inhouse.Multi-tenant security. Since the hardware resources are dynamically allocated across users as made available, the vendor is required to ensure that other customers cannot access data deposited to storage assets by previous customers. Similarly, customers must rely on the vendor to ensure that VMs are adequately isolated within the multitenant cloud architecture.

Examples of IaaS

Popular examples of IaaS include:

    DigitalOceanLinodeRackspaceAmazon Web Services (AWS)Cisco MetacloudMicrosoft AzureGoogle Compute Engine (GCE)

Each cloud model offers specific features and functionalities, and it is crucial for your organization to understand the differences. Whether you need cloud-based software for storage options, a smooth platform that allows you to create customized applications, or complete control over your entire infrastructure without having to physically maintain it, there is a cloud service for you.

No matter which option you choose, migrating to the cloud is the future of business and technology.

XaaS: Everything as a Service

One term you’re likely seeing more frequently in the world is XaaS, short for Everything as a Service. XaaS refers to the highly-individualized, responsive, data-driven products and offerings that are fully controlled by customers—and the data they provide via everyday IoT-powered sources like cell phones and thermostats.

By using that data generated over the cloud, businesses can innovate faster, deepen their customer relationships, and sustain the sale beyond the initial product purchase. XaaS is a critical enabler of the Autonomous Digital Enterprise.

    BMC Multi-Cloud BlogCloud Infrastructure: A Brief IntroductionHybrid Cloud Security: Challenges and Best PracticesData Center Tiers: What Are They and Why Are They Important?Cloud Growth in 2022: Trends & Outlook

Other “as a service” offerings:

    AI as a serviceDatabase as a serviceBusiness Process Management as a service (BPMaaS)Functions as a serviceTesting as a service

Defending the Whole, IaaS, PaaS, and SaaS from Mark Nunnikhoven

Original reference images:

What do you call a software that is privately owned and limited to a specific vendor or computer or device model? What do you call a software that is privately owned and limited to a specific vendor or computer or device model?

These postings are my own and do not necessarily represent BMC's position, strategies, or opinion.

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What is any proprietary software?

Proprietary software is any software that is copyrighted and bears limits against use, distribution and modification that are imposed by its publisher, vendor or developer. Proprietary software remains the property of its owner/creator and is used by end-users/organizations under predefined conditions.

What is a proprietary operating system?

Definition of proprietary operating system computer operating system that functions on only one type of computer. Proprietary operating systems limit the ability of software applications to run on other systems and also limit the market for any application software.

What are the two types of system software?

Contents. 1 Operating systems or system control program.. 2 Utility software or system support programs..

What is another term for the operating system a computer uses?

Alternate Synonyms for "operating system": OS; software; software program; computer software; software system; software package; package. Tải thêm tài liệu liên quan đến nội dung bài viết What do you call a software that is privately owned and limited to a specific vendor or computer or device model?

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