Your question needs a little more focus. Specifically, what stage of startup? Let's assume Series B or earlier. All the normal stuff like the top voted comment

Your question needs a little more focus. Specifically, what stage of startup? Let's assume Series B or earlier. All the normal stuff like the top voted comment describes. Missing from that list is the most important question! At A or B stage, what is revenue growth rate? At seed this is a different animal. Second most important, and also missing (!), brief bios on the management team. I'd also ask, combined experience of the engineering team, and often missed on a forum like this, combined experience of the sales team.