SECockpit is probably the most advanced keyword research tool on the market. Yes, you enter a seed keyword and get suggestions like any other tool.
But SECockpit can do so much more than display a list of related keywords. It can spit out low competition keywords. It can show you keywords that get a minimum CPC in Adwords. It can even show you keywords that have YouTube, Ebay or Amazon results on the first page.
- Brian Dean, backlinko.com