The biggest difference is that it runs in the browser with zero install and is free. GMFC and DevWing/DevFoam are capable but are paid, Windows-native programs; LightBurn is excellent but aimed at lasers, not hot-wire towers.
https://cncfoam.com focuses on the hot-wire workflow specifically: true independent X/Y + U/V towers, a morph between two profiles, generators for wings and other shapes, a live carved preview, and direct browser streaming to ESP32/FluidNC. It is younger and still in beta, so the legacy tools have more niche features today — but for getting a clean cut onto a modern controller without buying or installing anything, it is hard to beat.
https://cncfoam.com focuses on the hot-wire workflow specifically: true independent X/Y + U/V towers, a morph between two profiles, generators for wings and other shapes, a live carved preview, and direct browser streaming to ESP32/FluidNC. It is younger and still in beta, so the legacy tools have more niche features today — but for getting a clean cut onto a modern controller without buying or installing anything, it is hard to beat.