What is the difference between IaaS, SaaS, and Paas?

Prof.(Dr.) D G Mahto, Founder & CEO -
IaaS, PaaS, and SaaS are cloud service models that differ in the level of control and responsibility. IaaS provides virtualized computing resources, PaaS offers a platform for application development, and SaaS delivers software applications over the internet. 
IaaS (Infrastructure as a Service):
  • Definition: Provides virtualized computing resources like servers, storage, and networking.
  • Responsibility: Users manage the operating systems, applications, and data.
  • Example: Virtual Private Cloud (VPC) by AWS. 
PaaS (Platform as a Service):
  • Definition: Offers a platform for developers to build, deploy, and manage applications. 
  • Responsibility: Users manage the applications and data, while the provider manages the underlying infrastructure and operating systems. 
  • Example: Azure App Service, Google App Engine. 
SaaS (Software as a Service):
  • Definition: Provides access to software applications over the internet.
  • Responsibility: The provider manages the entire application stack, including software, infrastructure, and updates.
  • Example: Google Workspace, Salesforce. 
In summary:
  • IaaS: Provides basic infrastructure; users build everything on top. 
  • PaaS: Provides a platform for development; users focus on applications. 
  • SaaS: Provides pre-built software; users only need to manage their data. 
Prof. (Dr.) D. G. Mahto: A Visionary Director, Professor, Leader & Educator With over 25 years of excellence, Prof. (Dr.) D. G. Mahto is a Director, Professor, Philanthropist, HEI Builder, writer, consultant, reviewer, and career advisor at "Career Education for Success—Discover, Apply, Succeed!" He has empowered individuals, brands, and institutions through insightful content, innovation, and mentorship. Holding a Ph.D. in Engineering from NIT Jamshedpur, he has pursued Post-Doctoral Programs at IITs, NITs, and IIITs, reinforcing his expertise. A member of prestigious global organizations like NPA (USA), IET (UK), ASME, IAENG, and MRSI, he actively contributes to engineering, research, and education. An accomplished writer and researcher, he shares knowledge via Career Education Success Now, Career Edus, and Discover Knowledge Wisely. His vision integrates technology, innovation, and leadership, bridging gaps between aspirations and achievements. Connect with him for insights into education, research, and professional growth.

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