Link11 GmbH (Frankfurt, Germany, founded 2005) provides cloud-based DDoS mitigation and secure CDN services. Its platform includes automated detection and filtering (AI-driven) to block application-layer and network-layer attacks in real time. Link11’s solutions cover web, network and DNS protection, and the company holds patents for its attack mitigation technology. The service is aimed at organizations requiring high availability (used by governments and enterprises), and all infrastructure is designed for European data compliance. Link11 also emphasizes sustainability: its data centers are certified climate-neutral and it offers a “green” option to offset carbon.