When comparing Inno setup vs NSIS (Nullsoft Scriptable Install System), the Slant community recommends Inno setup for most people. In the question“What are the best installers for Windows programs?” Inno setup is ranked 1st while NSIS (Nullsoft Scriptable Install System) is ranked 11th. The most important reason people chose Inno setup is:
No cost, just download and install.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Free
No cost, just download and install.
Pro Flexible
Pro Pascal scripting engine
Integrated Pascal scripting engine option for advanced run-time install and uninstall customization.
Pro Easy to learn
Pro Debugger
The (generated) script can be run in Inno Setup and it is possible to set breakpoints to debug the code.
Pro Works as documented
Pro Free, Open Source
Pro Widely used
Pro Small header
The header added for the install routines is very small in size.
Cons
Con On uninstall does not check file content
If the file content has been changed after installation, the file is uninstalled without warning the user.
Con Pascal
For programmers used to C and C#, the Pascal scripting syntax is something that takes a while to get used to.