This news has been devastating to Twitter - Shares have fallen 7% since revealed that Salesforce have 'Walked away' from the deal.
It has been noted that concerns on the acquisition relate partly to the 'Fear of Internet Trolls'.
Salesforce are bringing out Einstein fully in the near future - Which is its AI/machine learning approach to Business - Twitter itself has its own enormous repository of Data which could be used with Einstein to follow trends etc.
Mr Benioff told the Financial Times his firm had "walked away" from any potential deal. Google, Apple and Walt Disney also reportedly considered - and then rejected - bidding.