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 4 years ago  

Steemit is a company and Steemit.com is just a website that let's people interact with the Steem blockchain. You can view the Steem blockchain on other websites, such as Steempeak.com

Justin bought the Steemit company/website which included the Steem tokens owned by Steemit.

Hive is a new blockchain and started as a duplicate of Steem minus Justin's equivalent Hive amount. The Steemit.com website is also cloned to Hive.blog; and Steempeak.com is cloned to Peakd.com