The company's site, launched to the public on November 1, 2010, used slashtags to provide results for common searches.

Users could create slashtags after signup, to perform custom-sorted searches and to reduce spam.

[2] The following features were available to all users: Blekko offered a downloadable browser toolbar or search bar which changes default search and home page URLs of the user's web browsers.

[4] In 2010, John Dvorak described the site as adding "so much weird dimensionality" to search, and recommended it as "the best out-of-the-chute new engine I've seen in the last 10 years".

[5] In Matthew Rogers' review of the site, he found it "slow and cumbersome", and stated that he did not understand the necessity or utility for slashtags.