Outside of being open source, and not Firebase, what advantages does this offer over Firebase? It wasn't obvious by looking at the page. Although, like Fractal

Outside of being open source, and not Firebase, what advantages does this offer over Firebase? It wasn't obvious by looking at the page. Although, like FractalHQ mentions below, it may be because I'm vewing the site on mobile. It's quite difficult to browse on mobile. I am interested in a compelling Firebase alterative though, this sounds interesting.