These people have used the same trickery as the ones who have registered the DMV.COM domain, to try to get people to pay them more money for something they can get for less at DMV.GOV. In other words, do NOT select the first (promoted) result on the Google results when you search because healthcare.COM will appear and they are NOT healthcare.GOV! They will try to make you think that they are, in fact, I asked the high pressure sales guy on the phone many time if they were the government site and got evasive and misleading answers.
If you put your info in the initial form, thinking you are signing up for the Affordable Care Act marketplace, you will IMMEDIATELY get a phone call from them and they will start the obviously high pressure sales pitch to get you to pay, right then and there, for one of they more expensive plans than you would get when you really sign up with the REAL healthcare.gov site and have all your income, etc. examined.
Once I realized who they were, really, I hung up and blocked the number. Just glad I never had to give them anything else, like SSN, because they already got too much personal data from their initial form questions and that worries me, since they do not seem very honest.