I applied online. The process took 4 weeks. I interviewed at Bain & Company
Interview
The first round was two 40-minute case interviews, one with a consultant and one with an engagement manager. They were fairly straightforward. The second and final round had three parts: a written interview, where you prepared a case for 60 minutes from a stack of 20 slides, and then presented it to a partner; a standard case interview with a partner; and a behavioral case interview with a partner.
I applied online and got a online assessment after ~1 week. I completed the online test but I haven't heard back since then. The timeline is a bit uncertain to me.
First round case interviews. Got standard questions about profitability and market entry. IMO the most difficult part was reading complex charts and distilling the key insights with time pressure. There was little behavioral.
The interview was overall efficiently run and very professional. It had 2 stages; a case interview typical of management consuting interviews and a fit interview to assess cultural fit with the firm.