viz.js is Graphviz recompiled to javascript with Emscripten. Dagre is the dot algorithm implemented in JS. I found dagre to work really well in most cases but G

viz.js is Graphviz recompiled to javascript with Emscripten. Dagre is the dot algorithm implemented in JS. I found dagre to work really well in most cases but Graphviz beats dagre in some edge cases (e.g. not order dependent, better with hierarchies, ...).