Tesserent invests in cyber security startups TrustGrid and AttackBound Tesserent invests in cyber security startups TrustGrid and AttackBound Involves a 25 per cent stake in the startups through a mix of cash and shares. Credit: Dreamstime Publicly listed cyber security services provider Tesserent has revealed its Innovation arm has made investments in cyber security startups TrustGrid and AttackBound. This marks Tesserent Innovation’s first step in investing in globally applicable proprietary IP and involves a 25 per cent stake in the start-ups, which is funded through a mix of $1.5 million in cash and $1.5 million in shares at a purchase price of $0.2345 per share.