If they like your application you will get an email telling you to do an online question and answer for them. It takes about ten minutes but you only have thirty seconds to prepare an answer after the question is asked. You may be asked to an online interview after that step which is the last step of the process.

I applied online and the initial interview was recorded video questions. A recording of an employee read the question to you, you had a minute to plan a response and then a minute - 2 minutes. There were about 5-4 mostly behavioral questions. The next step was an actual Skype interview with an AlphaSights employee. The guy was really young and nice which made the interview very comfortable.