If you are looking for a free, open-source alternative that does not require an activator, consider: Open-Shell (formerly Classic Shell):

A lifetime license for StartIsBack is incredibly inexpensive (usually only a few dollars for a single PC). Buying a legitimate key supports the developer, guarantees system stability, and keeps your PC safe from malware. Conclusion

Open-Shell GitHub releases page.

This is a completely free, open-source program that restores the classic Start menu for Windows 8, 10, and 11. It is highly stable, safe, and actively maintained by the community.

Offers deep skinning and color customization options for folders and taskbars.

When considering software like StartIsBack or any activators, prioritize safety and legality. Official software purchases support developers and ensure you receive updates and support. If you opt for free solutions, stick with well-known, reputable sources.