potrace is described as 'An open source command line utility that converts raster images to scalable vector graphics' and is a Vector Graphic app in the photos & graphics category. There are more than 25 alternatives to potrace for a variety of platforms, including Windows, Web-based, Mac, Linux and potrace apps. The best potrace alternative is Vector Magic. It's not free, so if you're looking for a free alternative, you could try SVGConverter or VTracer. Other great apps like potrace are SVGcode, Vectorizer.AI, vectormarker and Autotracer.org.
This is just potrace under the hood converted to Web Assembly. Same app except you can use it on the web. It's also a progressive web app so once you load the site you can use it offline. So it's essentially the same functionality (less the CLI stuff) but more cross-platform