My team has had luck rendering an SVG from the graph and sending it to a browser. It works well for about 10k vertices and edges. Above that scale we use datash

My team has had luck rendering an SVG from the graph and sending it to a browser. It works well for about 10k vertices and edges. Above that scale we use datashader, and we're investigating a potential to move to QGIS. We tried Gephi a few years ago and it had trouble at these scales.