When I setup DMARC on several domains a few years ago, there used to be a number of free tools/services that would help you read and aggregate the daily XML DMARC reports. This was great for tweaking your SPF rules to make sure mail you sent wasn't going into the recipient's junk folder (or worse never being delivered). There are some risks to deploying DMARC without this monitoring step.
I have a few more domains I want to setup with DMARC, but it seems that the once free monitoring services are now all paid services. What tools do you guys use to monitor these DMARC reports these days? Although those XML files look fairly simple, they're not really human-readable (for most).