This is an excellent request, as the licensing landscape for Microchip (formerly Microsemi) Libero SoC can be confusing. There is no single "Libero for free" version, but rather three distinct free tiers depending on your needs.
Here is the proper, actionable feature breakdown for a "Libero License Free" offering, as it actually exists today. microchip libero license free
This is not a demo or a trial. It is a perpetual, no-cost license for specific use cases. Here is exactly what you get and, crucially, what you don't. This is an excellent request, as the licensing
Partially true. PolarFire FPGAs are more expensive than Lattice iCE40, but Microchip offers low-cost dev boards (e.g., PolarFire Splash Kit ~$199). The free software makes the entry cost purely the hardware. Cost: $0 (Free)
While the software requires a license file to run, Microchip provides the Silver License completely free of charge.
How to get it: To use the Silver license, you must register for a Microchip account and request the license file. This file is tied to your computer’s MAC address (Host ID). You must install this license file in the software to activate the Silver features.