That’s a really broad question without more details about your setup. What RMM are you using? What size is your operation? What are you doing now and what problems are you trying to solve?
A lot of pros will tell you that ConnectWise Manage is the one to beat. I only have a team of 5, so I’m using all the power of it, but it has more features than most everything else. It’s certainly not the least expensive thing out there, and for a small shop, the learning curve and time/money spent to set it up might not be worth it. If you’re planning on growing and don’t want to have to switch, it might be right for you.
Tom doesn’t even use a ticketing system. He uses straight up email. I’m not sure how he tracks client profitability and other things like that, but it works for him.