What's the difference between "Menti" and "Mentimeter"? (online presentation service)

I’m told to “add Mentis” to online courses I teach, which requires my IT department to set me up to do so through some anonymous automated process. The person submitting my request said they could give me either “Menti” or “Mentimeter”, and read the descriptions out loud, and I picked one, though they weren’t very distinct.

But I can’t figure out what the difference is. It sounds like both refer to the same agency, namely, a web service that lets a meeting presenter ask questions, and lets attendees provide their answers and other feedback anonymously, in real time. Clearly one difference is that menti.com is the web site the attendees go to to participate (which I’ve done a few times already in meetings other people were running), whereas mentimeter.com is the front door web site for the company who provides the service, whose name is Mentimeter.

I’m getting unclear instructions about what I’m expected to go and actually do, and they appear to hinge on deciding whether to go with menti or mentimeter or both. But from context and other clues I’m getting the idea that these are both about the same thing, and I’m supposed to set something up through mentimeter.com (with an account my IT department gave me), and direct participants to go to menti.com, which doesn’t really fit with my instructions. There’s a Wiki article that doesn’t address this, and animated instructions on mentimeter.com that I can’t manage to read unless I start downloading the text and read in an editor (which I will probably do soon).

Can anybody point me in the right direction? Thanks!