Link11

What Is Link11?

Picture this: your e-commerce platform is running its biggest sale of the year when traffic suddenly spikes tenfold — except it is not customers. A distributed denial-of-service attack is hammering your servers, and every second of downtime costs thousands in lost revenue. You need protection that activates in seconds, not minutes, and you need it from a provider you can trust with your European data.

That is the scenario Link11 was built to handle. Founded in 2005 in Frankfurt am Main, Link11 is one of Germany's specialist cybersecurity providers, focused exclusively on DDoS protection and web application security. Unlike the American hyperscalers that bundle DDoS mitigation into broader CDN offerings, Link11's entire product is built around one mission: keeping European businesses online when attackers try to take them down.

The company holds BSI (Federal Office for Information Security) qualification as an IT security service provider — a distinction that matters enormously for organisations in regulated sectors like finance, government, and critical infrastructure. All traffic processing happens in EU data centres, with no data routed through non-European points of presence. For organisations bound by GDPR and German data protection law, this is not a nice-to-have but a hard requirement.

Key Features

AI-Based Detection Engine

Link11's core differentiator is its patented machine learning detection system. Rather than relying solely on static rules or signature-based detection, the AI engine continuously learns normal traffic patterns for each protected asset and identifies anomalies in real time. The practical result is attack mitigation that typically kicks in within 10 seconds — often autonomously, without any human intervention. False positive rates are notably low, which matters because aggressive filtering that blocks legitimate users can be as damaging as the attack itself.

Layer 3/4 and Layer 7 Protection

Link11 covers the full attack spectrum. Volumetric attacks (Layer 3/4) — the brute-force floods designed to overwhelm bandwidth — are absorbed by Link11's scrubbing infrastructure. Application-layer attacks (Layer 7) — the more sophisticated assaults that target specific endpoints and mimic legitimate traffic — are caught by the AI engine's behavioural analysis. This dual-layer approach is essential because modern DDoS campaigns typically combine both vectors.

Web Application Firewall

Beyond DDoS mitigation, Link11's WAF protects against the OWASP Top 10 vulnerabilities: SQL injection, cross-site scripting, and other application-level exploits. The WAF integrates directly with the DDoS protection layer, providing a unified security perimeter without requiring separate vendors or configurations. Bot management capabilities further distinguish legitimate automated traffic from malicious bots.

Zero-Touch Deployment

One of Link11's most practical advantages is deployment simplicity. Protection is activated via DNS redirect or BGP routing changes — no hardware to install, no agents to deploy, no network architecture to redesign. For organisations that need protection quickly or lack deep network engineering teams, this removes a significant barrier. The approach also means Link11 works with any hosting environment: on-premise, cloud, hybrid, or multi-cloud.

24/7 Security Operations Centre

Link11 operates a staffed SOC based in Germany, providing round-the-clock monitoring and incident response. During active attacks, SOC analysts work alongside the AI engine to fine-tune mitigation strategies. For enterprise customers, this human-in-the-loop approach provides the confidence that complex or novel attacks will receive expert attention, not just automated responses.

Pricing

Link11 operates on a custom pricing model, which means there are no published price points to reference. Every deployment is scoped based on the customer's traffic volume, number of protected assets, required mitigation capacity, and support level. This is standard for enterprise DDoS protection but does create friction for organisations in the evaluation phase — you cannot easily compare costs without engaging the sales team.

Contracts are typically annual or multi-year, with pricing structured around bandwidth and the number of protected domains or IP ranges. The Web Security Suite bundles DDoS protection, WAF, and bot management at a combined rate. Infrastructure Protection for network-layer assets uses a different model based on BGP-protected IP prefixes.

For organisations coming from Cloudflare's self-service tiers, Link11 will almost certainly be more expensive. The value proposition is not price competitiveness but rather the combination of BSI certification, purely EU-based processing, and dedicated SOC support — factors that matter more than cost savings for compliance-driven organisations.

EU Compliance & Data Privacy

Link11's compliance posture is one of its strongest selling points. As a German company (Link11 GmbH), it operates under EU jurisdiction by default. The BSI qualification as an IT security service provider is particularly significant — it is a formal recognition by the German federal cybersecurity authority that Link11 meets stringent security standards.

All traffic scrubbing and data processing occurs in EU data centres. Unlike global CDN providers that may route traffic through points of presence in the United States or Asia, Link11 keeps data flows within European borders. The company holds ISO 27001 certification, confirming its information security management system meets international standards.

For organisations subject to German data protection requirements (Bundesdatenschutzgesetz) or sector-specific regulations like BAIT (banking) or KRITIS (critical infrastructure), Link11's compliance profile eliminates the due diligence concerns that arise with non-EU security providers.

Who It's Best For

Regulated enterprises in finance and government where BSI certification and purely EU data processing are compliance requirements, not preferences. Link11 checks boxes that global providers cannot.

Critical infrastructure operators covered by Germany's KRITIS regulations or the EU NIS2 directive, who need certified protection with guaranteed EU data residency.

Mid-to-large European businesses running customer-facing web applications that cannot tolerate downtime and need protection that deploys without infrastructure changes.

Organisations replacing non-EU DDoS providers for data sovereignty reasons — Link11 provides equivalent protection without the cross-border data transfer concerns.

The Verdict

Link11 is a specialist, not a generalist. It does not try to be a CDN, a DNS provider, or an edge compute platform. It protects European organisations from DDoS attacks and web application threats, and it does so with BSI certification, AI-powered detection, and purely EU-based infrastructure. The enterprise-only pricing and custom quoting process exclude smaller organisations, and the global network cannot match hyperscale reach. But for compliance-driven European enterprises, Link11 delivers the security guarantees that matter most.

Frequently Asked Questions

Is Link11 GDPR compliant?

Yes. Link11 is a German company with all infrastructure located in EU data centres. They are BSI-qualified and ISO 27001 certified, ensuring full GDPR compliance for traffic processing and data handling.

How fast does Link11 mitigate DDoS attacks?

Link11's AI-based detection engine typically identifies and mitigates attacks in under 10 seconds, with many attacks neutralised autonomously without any manual intervention required.

How does Link11 compare to Cloudflare?

Link11 is a specialised DDoS protection provider with BSI certification and purely EU-based infrastructure, making it ideal for compliance-sensitive European organisations. Cloudflare offers a broader product suite with global reach but routes traffic through non-EU points of presence.

Does Link11 require hardware installation?

No. Link11 uses a cloud-based, zero-touch deployment model. Protection is activated via DNS redirect or BGP routing changes without any on-premise hardware or software installation.

What size of DDoS attacks can Link11 handle?

Link11's network is designed to absorb multi-terabit attacks. Their scrubbing centres have substantial capacity to handle even the largest volumetric DDoS attacks targeting enterprise infrastructure.