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WiX Toolset vs NSIS: catalog facts
WiX Toolset	NSIS
Free Free and open source; FireGiant sells extended support for older versions.	Free Free and open source.
Windows, Command line	Windows
Installer definitions are plain XML that fit in source control Integrates with build systems and Visual Studio through HeatWave	Produces small installers Script-based logic handles complex installation tasks
Steep learning curve compared with wizard-based installer builders Versions 3, 4 and 5 are out of community support	Requires learning its own scripting language Builds installers for Windows only
Downloadable app	Downloadable app
Open source	Open source
License not stated	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.