"I use the Market leaderboard very often to learn from competitors and to inform and inspire my clients."

Umbrellum is a very fine comprehensive SEO tool. Permanently you can continue to monitor positions and you get a nice insight into competitors. What I also really like is that the tool thinks along in search word suggestions. I've been using Umbrellum for a year now and couldn't work without it!

Featured tool: Leaderboard

After determining the keywords, you can see the "leaderboard" within your project. This shows the top 500 competitors. I use very often to learn from competitors and to inform and inspire my clients.