Open security is advocated as a transformative approach in the cybersecurity industry, challenging the traditional reliance on secrecy and static detections by promoting transparency and collaboration. The article argues that traditional methods based on obscurity are ineffective, as cybercriminals can easily bypass static detection techniques. Instead, a layered defense strategy, informed by frameworks like MITRE ATT&CK, is emphasized to disrupt an attack at various stages. Open security fosters a community where security practitioners share insights and methodologies, enhancing defenses beyond individual capabilities. By making security practices transparent, vendors can improve their systems with community feedback, thereby increasing trust and significantly reducing the frequency and impact of cyber threats. Elastic exemplifies this approach by sharing their security artifacts, allowing other companies to strengthen their defenses using shared knowledge and practices.