KKR invested in KnowBe4, the provider of the world's largest security awareness training and simulated phishing platform, valuing the company at $800m. The investment comes off the back of an exceptional 2018 for KnowBe4, which reached $120m of bookings and revenue growth of 110%. "KKR is an important strategic partner for KnowBe4 as we continue to grow worldwide and bring new-school security awareness training to new markets," said Stu Sjouwerman, CEO of KnowBe4. "We have had 23 straight quarters of explosive growth and there is no slowing down. All organizations need to invest in the human side of their security defenses and there is no better way to build their capabilities than to continually train and test them on the constantly evolving threats that they will be exposed to."