I applied, and then later I had a meeting with one of the Co-Founders as an initial call. I thought we hit it off well. He mentioned that I would be moving onto the next stage of the interview, and then he completely ghosted me. I even followed up weeks later to check-in to see if he just forgot to get back to me, but after almost 2 months, no reply. I'm sure they're busy, but surely, if you have the time to meet with me, you have the time to email me saying you're not interested anymore. I think it's unprofessional, and that's not how you treat candidates. Typically, after meeting once, the norm is to let the candidate know what's going on; next stage or not.