Start with the SpyFu main page:
Since we collect PPC advertisers on millions of terms, it takes just one click to find the domains that compete with you on one keyword, or those that give you the biggest competition across most of your keyword list.
Details: start with the SpyFu main page
1. Enter a competitor’s domain into the search bar on the main page.
2. On the results page, scroll down the page to find the “Top Paid Competitors.” Click “view all competitors” to open the domain list in an interactive, in-browser grid. You can also view your top organic SEO competitors on the left.
3. View Results