I’d start with reliability rather than price. I once tested a few providers for a weekend project, and the difference in consistency was pretty noticeable. I also checked whether the provider explained its proxy types clearly and had enough location choices. Speed matters too, but I think it makes more sense to see whether the service actually fits your use case first. After that, I usually compare pricing, available locations, and support options. It takes a little extra time, but it makes choosing much easier.