There are quite a few services available (even for free to some degree) that analyse the DMARC [1, 2] domain and failure reports for a domain: DMARC analyzer and dmarcian are the most prominent examples, afaik.
I’ve also played with these services but… I just wanted to have a high-level view on what’s happening out there. Any maybe also do the analysis myself. This is why I checked out rddmarc and played with it a bit. The result (which is a very basic web interface) is now publicly available here: dmarc-stats.
Feel free to fork and improve :)