If you are a certified SolarWinds partner, MVP, or a major educational institution, you may qualify for a permanent, free NFR license of an older version like 2020.2.6. This requires contacting SolarWinds sales directly.

The requirements for this version vary based on the size of your network (Small/Medium vs. Large/Extra Large). Hardware Requirements

Windows Server 2016 or 2019 (Standard or Datacenter editions). Framework: .NET 4.8 or later is strictly required.