We usually collaborate with *********, but for certain projects, we specifically choose SE Ranking. It's truly a great tool — the ability to track competitors' positions on a graph is fantastic. The interface is pleasant to use. Although the service is not cheap, its price is quite justified. I personally know the director of at least one agency that uses it as their main analytical tool and speaks very highly of it. I also recommend it; it is a worthy competitor to many similar services.
