I’d say for the majority use-case (as I see it), they’re excellent for manual diagram curation. Especially, D2 for software arch diagrams. Mermaid is great at many things.
It’s kind of hard to write up a fair comparison - it’s apples to oranges.
I can say that vizdom performs very fast hierarchical layouts (currently the only supported type). Example 14 in the live editor runs in about 1 second on my M1 Mac - but if you refresh the page it CloudFront will complain since the graph state is all in the URL and it’s too long.
D2 is open, they just have an optional proprietary layout algo. Of course one might contend that the rest is ‘just’ tooling but I find D2 provides a very quick and easy way to rough out diagrams without touching a mouse. The open source algorithms are good enough for me.
It’s kind of hard to write up a fair comparison - it’s apples to oranges.
I can say that vizdom performs very fast hierarchical layouts (currently the only supported type). Example 14 in the live editor runs in about 1 second on my M1 Mac - but if you refresh the page it CloudFront will complain since the graph state is all in the URL and it’s too long.