Majestic

SEObserver is the ultimate SEO tool concentrating rankings and backlinks in the same place.

We use and provide to all our users the top Majestic Backlink data, and we categorize backlinks and generate disavow files.

We track thousands of keywords rankings to reverse engineer how Google works.

Instead of classic SEO tools, all our data is available to you. That means, any users who enter our tool can freely access the integrality of our ranking archives.

Each month we try to add a new game-changing feature, making our solution a must-have for every serious SEO consultant.

More info on http://www.seobserver.com