I didnt know i had do say this, but I guess i do. What this forum sues is called discourse. Discourse wasnt made by gautam. Discourse is a template made to be used for forums (such as this.) There are thousands of instances of it, please dont pretend theres only 2, or call other instances a copycat, etc.
discourse is a forum template service you can pay for and basically you get a forum that your able to customize but cost like 50 bucks to make a forum and you gotta pay a fee for like every 1000 post or something