Wiz, the world’s largest cybersecurity unicorn, turned down a $23 billion takeover offer from Google's parent company, Alphabet.Wiz recently reached $500 million in annual recurring revenue and has a current private valuation of $12 billion.The decision to decline Google's offer was described as the toughest offer ever by Wiz CEO Assaf Rappaport.Founded four years ago, Wiz has raised $1 billion in investments and is backed by notable investors including Andreessen Horowitz and Sequoia Capital.