ImageAlpha

Limited to macOS only, excluding Windows and Linux users, which restricts its utility in mixed-environment teams or cross-platform development workflows.

Relies on tools like pngquant that perform lossy compression, making it unsuitable for scenarios where lossless optimization is required, as admitted by its dependence on these specific algorithms.

As a desktop application, it lacks easy integration into automated scripts or CI/CD pipelines, requiring manual interaction compared to command-line alternatives for batch processing.

Built with Python and Cocoa (PyObjC), which might introduce dependency or compatibility issues, and the project's activity level could affect long-term support, as inferred from the technology stack.