Playing devil's advocate here. How much change in the design would people think it is not a rip-off? If they changed the color scheme? If they changed the font? The type of visualization shown seems pretty standard (looks like a treemap plot?). I don't want to denigrate the importance of stylistic choices as they are very important in data visualizations, but it seems like a pretty standard visualization.
Perhaps it is the dimensions they chose to represent out of the data that was a rip-off? Ripping off methods of visualizing subtle aspects of the data that conveys information would be a more egregious offense to me.
Hey I made the CB Insights design. I completely agree the viz is standard (the treemap was my first d3 viz actually!). A lot of people are stopping at the charts and saying "well it's just a bar chart and a treemap, get over it!"
To me the fact that the entire layout outside of the chart, even the copy is exactly the same is the main offense. Even the table below the chart (when you click to see the data) is exactly the same. It would have taken them 20 minutes to just shuffle things around, but no they just replicated it.
We put a lot of time in figuring out the best way to present information so that users don't actually have to spend a lot of time to get answers. They skipped that part and stole our work.
Perhaps it is the dimensions they chose to represent out of the data that was a rip-off? Ripping off methods of visualizing subtle aspects of the data that conveys information would be a more egregious offense to me.