Why do programs offer both EXE and MSI installers?

Understanding the Dual Offering of EXE and MSI Installers in Software Deployment

In the world of software distribution, it is common to encounter applications that provide users with both EXE (executable) and MSI (Microsoft Installer) installer files, such as the popular 3D printing software Ultimaker Cura. This raises an interesting question: why do developers offer both formats? What are the advantages and considerations behind providing these distinct installer types?

The Origins and Differences Between EXE and MSI Installers

EXE Installers
An EXE (executable) installer is a standalone application that initiates the installation process. It is usually built using scripting languages or packaging tools, offering developers significant flexibility. EXE installers can include custom user interfaces, pre-configured options, and complex installation logic. They are often tailored for straightforward deployment and can be easily customized or wrapped within scripts for automated installations.

MSI Installers
An MSI (Microsoft Installer) package adheres to a standardized Windows installation framework. It is a database file defining the installation process, including files, registry changes, shortcuts, and other components. MSI packages are designed for seamless integration with Windows Installer services, facilitating uniformity, transactional security, and ease of deployment through tools like Group Policy or System Center Configuration Manager (SCCM).

Why Offer Both? The Rationale Behind the Dual Formats

Flexibility in Deployment Strategies
End-User Installations: EXE installers are often more user-friendly and customizable, making them suitable for end-users who want a straightforward setup experience.
Enterprise Deployment: MSI files excel in managed environments, allowing IT administrators to automate installations, perform silent deployments, and maintain consistency across multiple machines.
Customization and Compatibility
EXE installers can embed additional logic or pre-install checks, providing a dynamic setup process tailored to specific user needs.
MSI packages are preferred for standardized, repeatable deployments, ensuring that installation parameters remain consistent across multiple systems.
Development and Maintenance Considerations
Developers might generate MSI installers using tools like WiX or InstallShield, which require additional effort but provide integration benefits.
Offering an EXE version ensures broader compatibility, especially on systems where MSI support might be limited or where customized installation scripts are needed.
User Experience and Support
Providing both formats caters to a wider user base, from casual