When comparing SpyFu vs SEMRush, the Slant community recommends SEMRush for most people. In the question“What are the best SEO analytics tools?” SEMRush is ranked 1st while SpyFu is ranked 6th. The most important reason people chose SEMRush is:
With just a single seed keyword, the Keyword Magic Tool allows you to generate keywords within your niche, including long-tail keywords across specific subgroups.
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Pros
Pro Fair price compared to rest of the market
SEO tools are not cheap, SpyFu has a fair price for the value it adds.
Pro See competition data
Allows users to see SEO data on any domain, including your competition.
Pro Keyword generation
With just a single seed keyword, the Keyword Magic Tool allows you to generate keywords within your niche, including long-tail keywords across specific subgroups.
Pro Lots of features
More features than any of the other products here with a lot of depth.
Pro Gives more accurate analytics than any other tool
It also gives more updated Analytics Results.
Pro Reasonable free featres
While the pro-features are horribly expensive, you get reasonable amount of features in the free version.