Should have 2012 in the title (found as a meta header). nginx is the number one web server by market (although it depends on your data source/their measuring approach, so that's a bit arguable but NetCraft reports it has been since 2019 - https://news.ycombinator.com/item?id=29088538), and while the original component is open source, there's a lot of pro/plus/pay closed source pieces now.