Servlet is a Java programming language class used to extend the capabilities of servers that host applications accessed via a request-response programming model.

JSP is a Java technology that helps software developers serve dynamically generated web pages based on HTML, XML or other document types.

Key Criteria	Servlet	JSP
Definition	Servlet is a Java programming language class used to extend the capabilities of servers that host applications accessed via a request-response programming model.	JavaServer Pages is a Java technology that helps software developers serve dynamically generated web pages based on HTML, XML or other document types.
Developed By	Sun Microsystems.	Sun Microsystems.
Released On	June 1997.	JSP released on 1999.
Embedding	Servlet doesnt allow to embed java code in the HTML.	JSP allows to embed java code in the HTML.
Content	Servlets are Java programs that are already compiled which also creates dynamic web content.	JSP is a webpage scripting language that can generate dynamic content.
Purpose	Servlet act as a controller. Servlet is used for bussiness logic.	JSP act as a view. JSP is basically used for presentation.
Speed	Servlets are faster than jsp.	JSP is slower than Servlet.
Validation	Clientside validation is possible in servlets.	Clientside validation is not possible in JSP.