[scrapheap]

I've used Graphviz for a long time and is still my first port of call where I need to produce the graph as a SVG or PNG.

However, if I'm putting the graph into a project in GitHub/GitLab then I'll use Mermaid as it lets me keep it inline in the markdown file itself. It's also makes it easier for other team members to maintain that graph in the documentation as it doesn't require them to run additional tooling.