A world much like our own. A city like the one in which you live. A corporation whose doors you pass every day. Maybe you notice the subtle sans-serif fonted words adorning the entrance, maybe you pass by obliviously engaged in finishing your latte and catching up on a podcast.

But behind that glass frontage and tasteful minimalist decor lies a terrible secret; for within those walls, unbeknownst even to those that labour tired-eyed over PCs from 9 to 5, plans are drawn to herald the return of foul N'grathotep from its eternal dreamless slumber using the powers of...

?

Spreadsheets? Why would a cult devoted to (or the human avatars of) some kind of eldritch horror from beyond the veil of time and space require a moderately sized office-based company to complete their dark summoning ritual? The solution would need to be something unable to be accompanied by a person in isolation. I'd like the answer to focus on that aspect: why would they need a company, so I'd like to avoid solutions like "They need a company to use as a front" (sure, a front, but for what exactly? ). Could it be for the access to personal information? Could it be something to do with the stock market? What about involving an app of some kind to complete part of the ritual?

The closest I have managed is some kind of entropy-manipulation as represented by enormous quantities of computer data: but I can't very well explain what sort of physical act this would comprise, nor what kind of company one would use as to enable it.

(PS: I've been pointed towards this answer as inspiration. I like the idea, but for plot purposes this company doesn't have the scope or reach of Facebook, so they wouldn't be able to reach a billion+ users. I'm trying for something smaller scale, if possible)