In todays world, startups are not just innovating and disrupting industries; they have also becoming attractive targets for cybercriminals. With the allure of valuable intellectual property, customer data, and sometimes the sheer challenge of penetrating innovative new technologies, cyberattacks on startups are growing in frequency and sophistication. Learning from high-profile hacks and breaches is more than just an exercise in schadenfreude—it's a crucial part of building a resilient cybersecurity posture from the ground up. This article explores three notable cybersecurity incidents, dissecting what went wrong and, most importantly, offering insights into how startups can avoid similar pitfalls and build robust, resilient defenses from the onset.