SEM Rush
SEM Rush is a just-outside-the-norm keyword and competitor research system. Unlike keyword tools that rely solely on precompiled keyword lists, and deliver results limited to lists of suggested keywords and their statistics, SEM Rush gives you a well-rounded view of your proposed keyword landscape and the websites behind them.
SEM Rush is an anomaly of sorts when compared to other available keyword research tools today. First, it offers a free version that is comprehensive and feature-rich in itself, and to back that up, the price of the paid version of this keyword research resource more than justifies the additional features you’ll receive for the nominal price. SEM Rush strikes a harmonious balance of an excellent price for excellent features, or a good set of very usable features for another excellent price – free.
Traditionally, free keyword tools that are comprehensive do not typically offer a paid version, and paid keyword tools that offer free versions usually either cripple their free versions, or charge higher-than-they-should-be prices for their paid upgrades – none of which are true with SEM Rush.
SEM Rush relies on Google’s keyword tool for their data, and at present, their database is comprised of 25 million keywords spread across about 9.5 million domains. It should be noted that SEM Rush uses Google’s US datacenters, alone, for their results and statistics. Therefore, if your website is not currently listed in Google.com, and your competitors’ websites are not listed in Google.com, you probably will not benefit from SEM Rush’s services.