What is VDI, DaaS, SaaS & CPaaS?


Cloud computing consists of three different types of computing services delivered remotely to clients via internet connectivity. Clients pay a service fee to providers, to gain access to systems to deliver software as a service, platforms as a service and desktop as a service to subscribers. Clients who subscribe to cloud computing services have a variety of benefits, depending on their particular business needs. The Subscribers to computing services delivered can reduce the IT service expenditures for their organizations; and gain access to more agile and flexible enterprise-level computing services, in the process of delivering services.

  • VDI: VDI refers to the virtual desktops which are served through on-premise servers maintained by IT teams. It’s the traditional way to manage virtual desktops. VDI technology maintained, managed, and upgraded whenever necessary. It is a cloud-based virtual desktop solution that separates virtual desktops from on-premise servers, enabling brands to leverage a third-party hosting provider. The infrastructure works through on-site technology solutions and also requires a hardware stack maintained by IT administrators. Legacy VDI solutions are complex tools that require a complex stack, purchasing servers.
  • DaaS: Desktop-as-a-service (DaaS) is a form of virtual desktop infrastructure (VDI) in which the VDI is handled by a third party. It is also called hosted desktop services, desktop-as-a-service delivered cloud service along with the apps needed for use on the virtual desktop. It handles storing, securing, and backing up a user’s data, to upgrades for the DaaS service and support applications. Some of the desktop-as-a-service providers include Amazon, Desktone , and Citrix.
  • SaaS: SaaS is “Software as a Service” that provides clients with the ability to use software applications on a remote basis. Software as a service is also known as “software on-demand”. Clients can access SaaS applications via the web because of service providers where the host applications and their associated data at their location. The primary benefit of SaaS is the lower cost of use. Examples include Google Applications and email-based applications like Yahoo! Mail, Hotmail, and Gmail.
  • CPaaS: It stands for the Communications Platform as a Service. It is a cloud technology that provides the integration of real-time communications into existing business applications without complex engineering. CPaaS bridges communications between humans, objects, and processes, enabling faster, easier, more secure digital engagement of the business. CPaaS allows you to interact with the customers.

What is DaaS? How does it Work?

Desktops-as-a-Service also known as DaaS, delivers secure virtual apps and desktops from the cloud to any device or location. This desktop virtualization solution provides secure SaaS, legacy applications, full Windows-based virtual desktops and delivers to the workforce. DaaS offers a simple and predictable subscription model that is easy to scale. This service is easy to manage, with many of the IT admin tasks of the desktop solutions.

It is a type of virtual computing. It provides cloud-based workspaces to employees. The technology uses the physical terminal to communicate with the workspace hosted by the company’s cloud provider.  It also helps to alleviate the cost, time, and potential legal implications when an employee forgets a laptop on the subway because the data is located elsewhere. The DaaS infrastructure where all applications and data being accessed securely, from the company’s infrastructure.  The DaaS environment has no sensitive information stored on a local machine.

How does DaaS work?

A desktop as a Service (DaaS) delivers virtual applications and desktop services via a public or private cloud service. The workforce can access this service via an HTML-based web browser or a secure application downloaded to a device such as a laptop, desktop, or tablet through an internet application.

DaaS is offered as a subscription service with the backend virtual desktop infrastructure (VDI), including the virtual machines run on the desktop operating systems, which are hosted by a third-party cloud provider. The DaaS streams the virtual desktops to a customer’s end-user devices.

DaaS manage VDI deployment, maintenance, security, upgrades, data backup, and storage. The customer manages applications and desktop images. It is a good choice for organizations that don’t want to invest in and manage their own on-premises VDI solution.

VDI vs. DaaS

Desktop as a service provides all the advantages of virtual desktop infrastructure, including remote worker support, improved security, and ease of desktop management.

DaaS provides additional cost benefits. Deploying VDI requires investment in compute, storage, and network infrastructure. Those costs have decreased with the emergence of converged and hyper-converged infrastructure systems purpose-built for VDI.

With DaaS organizations pay no upfront costs. There is only pay for the virtual desktops they use each month. These subscription costs can add up and eventually be higher than the capital expenses of deploying on-premises VDI.

Some advanced virtual desktop management capabilities may not be available for certain DaaS deployments, depending on the provider.

Advantages and Disadvantages of DaaS

One of the most significant advantages of a DaaS model is cost-saving. It provides virtualized desktops on an operational basis and a subscription model. This is the most cost-efficient method. DaaS solutions secure sensitive information and stored on local machines. The DaaS system is provisioned to meet the changing requirements. Investing in a DaaS solution can be cost-effective if brands are wreckless and solutions can rack up high costs. It’s an operational expensive. The DaaS strategy offers a true price without hidden charges for usage. When considering a budget it is difficult to plan resource allocation. Thus it is important to understand the scalability and penalties of the cloud provider offering the service.

Internet connectivity is another disadvantage of a brand becomes too over-reliant on a provider. “If the internet provider is flaky at best then the user has a poor experience and not be able to access the resources. If the applications are graphic intensive and require a high 4K definition, then it depends on the Internet speed and has a poor time.


A software distribution model in which a service provider hosts applications for customers and makes them available to the customers via the internet. It is one of the three major categories of cloud services, along with infrastructure-as-a-service (IaaS) and platform-as-a-service (PaaS).

SaaS examples

The SaaS model of software delivers many types of business applications and incorporated into the delivery strategies of many enterprise software vendors. The companies of  SaaS offer a variety of business applications, including email and collaboration, customer relationship management (CRM), billing/payroll processing, sales management, human resources management, financial management, database management, enterprise resourcing planning (ERP), content management, and document editing and management. The organization pays for SaaS applications with the subscription fee, on a monthly or annual basis. 

SaaS pricing

Providers usually price on some type of usage parameters. For example, they charge based on the number of people using the application, the number of transactions, or some other measure of usage. Users typically access the applications using a web browser and use a thin-client terminal. Most of the SaaS offerings are based on a multitenant architecture, with a single version of an application is used for all the service provider’s customers.

Cloud computing for applications

SaaS is based on cloud computing which saves organizations from installing and running applications on the systems. It reduces or eliminates the associated costs of hardware purchases and maintenance of software and support. The initial setup cost for a SaaS application is lower than equivalent enterprise software purchased via a site license.

The use of SaaS reduces the long-term costs of software licensing which depends on the pricing model for the individual SaaS and the enterprise’s usage patterns. SaaS can cost more than traditional software licenses.

SaaS provides enterprises the flexibility inherent with cloud services: The SaaS buy software licenses and install the software on a variety of computers. The savings can be substantial in the case where the new hardware purchases to support the software.

The pay-as-you-go model of payment lets enterprises to shift costs to an on-going operating expense which is easier-to-manage budgeting. It stops subscribing to SaaS offerings whenever they want and thus stop those recurring costs. 

SaaS advantages for enterprise IT

The applications delivered via SaaS are available over the internet where users access the software from any devices and locations having internet connectivity. The ability to run on both mobile devices and computers contrasts with traditional enterprise applications. SaaS offerings support MacOS, iOS, and Android run on all the major browsers.

Another advantage is easy scalability. Cloud services allow enterprises to ramp services and features up or down as needed. It is especially important for enterprises whose businesses are cyclical and are growing quickly.

SaaS customers also benefit from the fact that service providers can make automatic updates in software on a weekly or monthly basis. So, enterprises don’t need to worry about buying new releases on availability or installing patches such as security updates. It is especially applied to organizations with limited IT staff to handle these tasks.

SaaS risks and challenges 

SaaS has a set of risks and challenges where enterprises maximize the benefits of the delivery model. The users of SaaS rely upon their service providers running at all times to access the applications as needed. It also depends on the providers to ensure the software keeps update in terms of the new features, security patches, and other changes.

SaaS provides great measures to ensure continuous uptime and availability. The largest vendors experience unexpected interruptions in service. Companies use SaaS expect to lose some level of control when it comes to accessibility, which is one of the trade-offs of cloud computing.

This loss of control extends to other areas where a service provider gets a new version of an application but as an enterprise will not be ready to make such a change or doesn’t want to incur the costs of training users in the new version. If any enterprises decide they want a new SaaS provider, it will confront the difficult task of moving extremely large files over the internet. 

SaaS security and privacy

Security and privacy are also issues with other cloud services. If a service provider experiences a data breach, that can compromise the safety of the enterprise’s data and the availability of the services. The potential risks related to service quality and user experience. Despite improvements in networking technology, SaaS applications hosted from where the users are located, there can be latency issues that affect response times for applications.

Many organizations do not have a broad cloud strategy and led to a rise in business users acquiring SaaS applications without the knowledge of IT and fill the gaps that exist. It leads to wasteful spending, poor data management, and extra work to move processes and data from one non-integrated system to another system.


CPaaS stands for the Communications Platform as a Service. It is a cloud-based platform that enables developers to add real-time communications features to their applications without the need to build backend infrastructure and interfaces. Traditionally, real-time communications take place in the applications to built for these functions. As users use the native mobile phone app to dial the bank but have you think that why you can’t do video chat a representative right in your banking app? The dedicated applications like the traditional phone, Skype, FaceTime, WhatsApp, etc. use for a long time because it’s costly to build and operate a communications stack, from the real-time network infrastructure to the interfaces to the programming languages.

It offers a complete development framework to build real-time communications without having to build your own. This includes software tools, standards-based application programming interfaces (APIs), sample code, and pre-built applications. It also provides support and product documentation to help developers throughout the development process. Some companies get software development kits (SDKs) and libraries for building applications on different desktop and mobile platforms.

Advantages of using a CPaaS

CPaaS providers use cloud technology to offer companies of any size to develop and embed communications features. Development teams can save on human resources, infrastructure, and time to market.

CPaaS include affordable pricing models, where developers pay for just the services needed. It also allows multi-tenancy or the ability for multiple customers to use the service, each within a separate and secure environment.

Technical support is another advantage of using a CPaaS where developers use online tutorials, guides, and forums to find the answers or access 24/7 live support. Finally, It allows developers to focus on building their applications rather than on the IT infrastructures.

Some examples of CPaaS applications

The growth of the CPaaS market emerging trends in customer-facing communications and need for the contextual communications is one of the biggest CPaaS markets where companies will improve the overall customer experience. Some common applications include video-enabled help desks, appointment reminders, and authentication services.

Video chat allows customers to receive more personal and engaging services than traditional channels. For example, a customer clicks on a button and instantly reach a support agent on the website. Companies use CPaaS to better track customer engagement with different platforms.

CPaaS market 

The CPaaS market is not easy to define, made up of a mix of independent software vendors, systems integrators, service providers, and traditional equipment vendors. Analysts predict it will grow from $400 million in 2015 to $8.1 billion in 2019.

Why You Need to Know About CPaaS

Research shows that customers want communication which is personalized, consistent, always-on, and preferably come in as many channels as possible. When it comes to communication, especially mobile communication, customers simply need more and more options, more reliability, and more accessibility. It provides all with a back-end communication infrastructure, presented “as-a-service” from a vendor,  integrated with app offerings through extensive APIs. It is a great tool for companies looking globally. CPaaS is a useful technology for businesses of all sizes with worth exploring.


Daas, SaaS, CPaas use” as a service” in terms to provide services to the people in various applications. Cloud computing is a useful tool to communicate and to build apps, IT infrastructure. Thus, innovation in technology brings a change in the world.

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