I was very curious about this and did a bit of research. The answer to it is squishy. It seems to be mostly a marketing term. The best definition I found was this:
"A service that is HIPAA eligible is one that is capable of being configured in a way that could meet HIPAA compliance requirements, but you have to know how to do it, it doesn’t happen ‘out of the box.’"
EDIT:
I was very curious about this and did a bit of research. The answer to it is squishy. It seems to be mostly a marketing term. The best definition I found was this:
"A service that is HIPAA eligible is one that is capable of being configured in a way that could meet HIPAA compliance requirements, but you have to know how to do it, it doesn’t happen ‘out of the box.’"
https://www.cleardata.com/articles/hipaa-eligible-hipaa-comp...
So it sounds great but doesn't actually mean that much.