Qatalyst?

They recruit incredibly early (early March this year) from a small number of schools. Only know Harvard and UChicago for sure are among those schools--probably the other HYPSM too. Q makes no attempt to recruit from my school which is a semitarget/target for BB/EBs. Second-hand info from this forum indicates extremely technical interviews. Even more technical than EBs. 10+ interview rounds supposedly.

https://www.wallstreetoasis.com/forum/investment-banking/qatalyst-interviews

Can attest all is true, only recruit from Harvard, Wharton, U Chicago, Berkeley, USC, and BYU. Things kicked off in March this year, they only have around 5 spots, Super technical and a million interviews.

Their main targets seem to be Wharton, Harvard, UChi, UCLA, USC, Stanford, BYU and Ivey.Really strong students from schools that has alumni at the firm will be able to get a first round through networking too, like UT Austin, Brown, Kelley, other ivys.Interviews are 3-4 rounds, then a 4-5 round superday; technical as fuck - however, the finance technical aspect of it is a bit overrated on this forum. Knowing the tech industry inside out, knowing a subvertical super well, being able to pitch a long and short, pitching an M&A and knowing FAANGM and companies Q has advised inside out is the most important bit of prep you can do.

Interview process is the hardest on the street. Prepare for phone interviews of straight grilling before you are allowed to get FaceTime or any personal questions. The technical questions are also nothing like the guides so you better know them inside and out and know LBO & M&A models by heart. And all that is if you are able to even get a look which is close to impossible without an intro from someone.

Lots of info getting thrown around on this thread so thought I'd add in how my class faired with Q. Attend NYU and recruiting was near impossible with them on our end. Not exactly complaining because we do have great access to other EBs/BBs but no one from Q responded to me or anyone I talked to (including multiple people with extremely strong profiles who got multiple other top EB offers). As for the interviews, saw some old Q questions floating around somewhere and they were a mix of tough technicals (but nothing too different than EBs) and interesting behavioral (not your generic TMA a time). They also had some very specific tech questions that seemed much more specific than other industry-focused boutique banks. Even if you get to the interview I put the odds as being quite slim. 

I know someone who made it very far in the process and didn't get the offer who told me a bit about the interviews. What I'm reading above seems accurate - the interview process is extremely long and challenging. You need to know technical concepts like 3-statement modeling, M+A, LBO, etc. extremely well beyond just memorizing guides. There's also a big emphasis on tech and tech M&A and there are a lot of follow up questions to make sure you really know what you're talking about.

Interviewed with Q for both summer and full-time before accepting other offers, but generally would say 1) reach out to HR, 2) the analysts are pretty nice and are willing to talk to kids who didn't go to their UG, 3) definitely a lot of interviews. Think for summer at one point they asked for an essay on "why tech" if I remember correctly