Microsoft.FeatureManagement doesn't need Azure. Here are the ways to feed it flags, from appsettings.json to a custom provider to a hosted service, and what each one costs you.
Need a feature to turn itself on or off at a specific time? Microsoft.FeatureManagement’s TimeWindow filter does exactly that, without making your deployment pipeline cry.
Microsoft.FeatureManagement's targeting filter makes user targeting quick and easy, but JSON gets ugly fast. Here's how targeting works, what Azure App Configuration fixes, and how FeatureFlags.app keeps it simple.