I know it's old question but, serpwoo is probably the best KW tracker and niche tracker on the market. For $25 it gives 200 KWs, which is very good in my opinion. But the best thing about them is data they are providing (and the way they are providing it), a lot of insights without need to check other tools (time saving). All TOP20 results are shown on one diagram, you can watch websites gaining and losing rankings almost like in real time. Seeing algho updates isn't unusual also. Really like that tool too
