Welcome to my inbox for the last several months. Just as the world now has a Groupon and a Birchbox for everything, so too is Pinterest creating a wake of copy-cat sites.
We're not talking about sites that merely incorporate Pinterest's design elements. There are sites that have copied Pinterest's style, functionality and even portions of its name.
Pinterest hasn't released user numbers, but one study found it drives more traffic to websites than Google+, YouTube and LinkedIn combined. Copy-cat sites are another unofficial testament to its success.
In the gallery below, we've compiled some of the most blatant examples of Pinterest copy cats. Have you seen any other sites that have taken imitation too far? Where is the line?
UPDATE: The site Reform and Revolution was posted online before Pinterest and has been removed from this gallery. Mashable regrets this error.
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