MongoDB is the textbook success of "Zero friction and slick marketing beats good engineering discipline" that is the AI froth right now.
From a technical standpoint? Very different. From a marketing standpoint when selling to software-development clients? Same space.
Yeah, glancing at headlines this is basically "MongoDB is a company with a lot of experience selling to enterprise clients (and by extension the CEO knows how to run such a company), Meta wants to sell enterprise clients their AI offerings".
Which is like, not as weird as most AI company headlines, to be honest?