I came here to agree with this. You don't put IBM's logo on your page just because one of your team used to work there.
That gives off a bad signal to someone visiting your site.
Everyone's faking it till they make it but at the same time using a logo like that, which universally implies that you have some kind of relationship with that company or they are using your product, is not even faking it.
And that's ignoring the legal challenges you are up for if that company spots you doing it.
BTW this sounds like a genius offering
I was concerned when I read this, and was going to suggest that they consider changing it. But I just looked at the page and it seems clear in context. That section of the page is describing their team, and the text is talking about where they've worked previously. It's true that the logos imply some relationship, but in this case the relationship being implied is that of former employer.
Had the logos been on their frontpage with no explanation, the implication would be that these companies are customers, but there's no such implication here.
(Btw, I appreciate that you're saying this from a place of actually liking the product, or at least the idea, - I think it's often true that criticisms are coming from a place of wanting to like something, but commenters usually don't make this bit explicit and then the criticism just sounds like harshness for its own sake.)
Wait until Elon sees one of their products is called HyperLoop