If she wants to sell to enterprise Marketo is a good option because of the deal size / volume. Google uses it for selling Google Cloud Platform. Otherwise Hubspot is probably a better idea.
Enterprise is definitely not on the menu, and Hubspot or one of the similar alternatives does sound more around the level she'd need. I had some fun messing around with Mautic and it could be fun to learn, but I'm not sure how its future looks.
Acquisitions can go both ways and apparently the guy who invented and put a lot of sweat into it (dbhurley) has parted ways with the project. Also they used to produce a lot of media on using it, but it's all a couple of years old now. Maybe that means they got the fundamentals right back then but it does send a mixed message. I would love to try it, I've set it up and it seems to be working, but I'm just not sure what'll happen if something goes wrong (their forum moves a little slow too). I have no special knowledge, just a gut feel and outsider impressions.