In fact, Max worked a lot with Hans Rosling in the past: in this BBC documentary on ending global poverty, for example (https://www.gapminder.org/videos/dont-panic-end-poverty/). You can find him listed as collaborator in the sources (https://www.gapminder.org/news/data-sources-dont-panic-end-p...).
As you say, Gapminder is one organization that takes data from published datasets and communicates it to a larger audience. The Gapminder foundation therefore has a similar mission – promoting fact-based world views, informing people about long-term changes in living standards. But Gapminder is not broadly focussed on global change – it does not cover violence, war, poverty, education, environmental change, etc. – and instead more narrowly focuses on health and demography. The areas of my own personal work: environment, food, and energy, for example, are not extensively covered there.
In fact, for those topics that lie outside of its focus, they often rely on us as input (you can find us referenced throughout their book 'Factfulness' for example). And similarly for us: for long-run trends on aspects such as child mortality or fertility rate, we reference their datasets (https://ourworldindata.org/grapher/child-mortality).
So our mission is very similar and we continue to collaborate, but our approach slightly different. Gapminder is narrower in focus and tries to capture a much more general audience. We go for more breadth and depth, and target a less wide (but still large) general audience.