CSL Computer Service Langenbach GmbH

Germany · joker.com · 7 vendors

CSL Computer Service Langenbach GmbH, operating as Joker.com, is an ICANN-accredited domain registrar based in Düsseldorf, Germany. The company provides domain registration services, managed hosting, root servers, private cloud solutions, and SSL certificates. They also operate their own data center, offering comprehensive internet services.

Resilience scores

Technology vendors

Services catalogue

2 services in catalogue across 1 category; runs on 7 sub-vendors.

Insights

Last updated 2026-08-14 · revision 2

7 direct vendors, 53 subvendors

Direct vendors by controlling owner country (sample)

Subvendors by controlling owner country (sample)

Migration Readiness: 7/10

Assessed by AI based on technology stack characteristics (cloud-native vs legacy, containerization, microservices), regulatory environment, data residency requirements, financial stability, and vendor lock-in risks. The score ranges from 0-10, where higher scores indicate better readiness for technology migration.

CSL Computer Service Langenbach GmbH shows good technical readiness for migration, primarily due to its modern internal tech stack. The use of a hybrid virtualization platform, including containers (LXC) and virtual machines (KVM), along with high-availability clustering and load balancing, provides a strong foundation for adopting cloud-native architectures. Their 'Private Cloud' offering and internal use of solutions like Nextcloud and OwnCloud further demonstrate expertise in scalable, virtualized environments. The vendor relationships, with geographic diversity across 4 countries, suggest a moderate level of external dependency, and the 'Vendor Lock-in Risk: Unknown' means we cannot definitively assess this factor. However, significant challenges and unknowns exist. The lack of specified data residency requirements and regulatory environment information is a major impediment to assessing readiness for public cloud migration, as these are critical compliance factors, especially for a German company. Furthermore, CSL's business model, which includes 'Root Server (Dedicated Servers)' and 'Inhousing / Colocation' services, indicates a strong investment in and preference for on-premise infrastructure, which might imply a strategic inclination away from full public cloud adoption. Missing financial data also prevents an assessment of the company's ability to fund a significant migration initiative.

Compliance

8 in-scope frameworks identified; showing 3.

ISO 27001 (source) — Assessment Required

ISO 27001 is the internationally recognized standard for information security management and is highly relevant for CSL GmbH given its role as a managed hosting provider, domain registrar, private cloud operator, and data center operator. Enterprise clients such as Telefónica and HOCHTIEF typically require their IT service providers to hold ISO 27001 certification. In Germany, ISO 27001 is also referenced by BSI IT-Grundschutz and is increasingly expected for NIS2 compliance. The absence of a publicly disclosed ISO 27001 certification represents a medium risk — it may indicate either that certification exists but is not publicly advertised, or that it has not been pursued. Risk is Medium because non-certification may affect enterprise client retention and NIS2 compliance posture.

Evidence: https://csl.de/, https://csl.de/unternehmen/rechenzentrum, https://www.iso.org/isoiec-27001-information-security.html, https://www.bsi.bund.de/EN/Topics/ITGrundschutz/itgrundschutz_node.html

PCI DSS (source) — Assessment Required

Joker.com accepts payments via Visa, Mastercard, American Express, Diners Club, PayPal, and Apple Pay for domain registrations and services. Any entity that stores, processes, or transmits cardholder data must comply with PCI DSS. The risk level is Medium because: (1) if CSL uses a fully outsourced payment processor (e.g., PayPal, Stripe) and does not store card data, PCI DSS scope may be minimal (SAQ A); (2) if CSL processes card data directly, full PCI DSS compliance (SAQ D or QSA assessment) is required. Non-compliance can result in card scheme fines, loss of payment processing ability, and reputational damage.

Evidence: https://joker.com/?mode=payment_methods, https://joker.com, https://www.pcisecuritystandards.org/

GDPR (source) — Assessment Required

CSL Computer Service Langenbach GmbH is headquartered in Düsseldorf, Germany — a core EU member state — making GDPR unconditionally applicable. As an ICANN-accredited domain registrar operating since 1997 via joker.com, CSL processes substantial volumes of personal data including registrant WHOIS data (names, addresses, email addresses, phone numbers), customer billing and payment data, and employee data. Domain registrars are specifically scrutinized by data protection authorities because WHOIS data historically exposed personal information publicly. The company also provides managed hosting, private cloud, colocation, and connectivity services, all of which involve processing customer personal data. ICANN's WHOIS policy conflicts with GDPR have been a major enforcement area since 2018. Non-compliance risks include fines up to €20 million or 4% of global annual turnover, reputational damage, and potential suspension of ICANN accreditation. The risk is rated High due to the volume and sensitivity of personal data processed, the global customer base, and the regulatory scrutiny domain registrars face.

Evidence: https://joker.com/imprint, https://csl.de/unternehmen/impressum, https://joker.com/imprint#privacy, https://icann.org/, https://ldi.nrw.de/, https://gdpr-info.eu/

Financials

Three-year financials

Financial Resilience Score: 6/10

CSL Computer Service Langenbach GmbH (Joker.com) shows characteristics of a stable, mature Mittelstand IT-services company with a 50+ year corporate history and 25+ years as an internet service provider. Its business model is heavily based on recurring revenue streams from domain registrations, managed hosting, SSL certificates, private cloud, and colocation services — all subscription/renewal businesses with typically high retention. The company operates its own data centre in Düsseldorf, reducing third-party dependency and capturing margin, and maintains long-standing enterprise references including Telefónica Deutschland, HOCHTIEF, VDI, DJV, and Grey. However, the company faces significant scale disadvantages versus hyperscale registrars (GoDaddy, Namecheap, IONOS, Cloudflare) and major German competitors (United Internet/1&1 IONOS, Strato, Hetzner), creating pricing pressure. Commoditisation of core domain and hosting products erodes margins, and the CapEx intensity of running an owned data centre in a high German energy price environment adds cost pressure. The founder/family GmbH structure typically means limited access to external equity capital, and there is no public bond rating — refinancing depends on bank relationships. Since the company qualifies as a small GmbH under §267 HGB, revenue and EBIT are not publicly disclosed under §326 HGB, making a fully data-driven resilience assessment impossible. Third-party estimates place annual revenue in the low to mid single-digit millions of EUR, consistent with a niche registrar/hosting SME. The resilience score reflects a qualitatively stable but modest-growth profile typical of a specialised Mittelstand IT-services GmbH.

Key strengths: Long track record (50+ years as company, 25+ as registrar) indicative of stable cash flows, Recurring subscription/renewal revenue model with high retention, Own data centre in Düsseldorf reduces third-party dependency and captures margin, Diversified service portfolio across domains, managed hosting, private cloud, colocation, SSL, and connectivity, Notable enterprise references (Telefónica Deutschland, HOCHTIEF, VDI, DJV, Grey), Long-standing ICANN accreditation with 400+ TLDs supported

Risk factors: Scale disadvantage vs. hyperscale registrars (GoDaddy, Namecheap, IONOS, Cloudflare) and major German competitors (1&1 IONOS, Strato, Hetzner), Commoditisation of core domain and hosting products eroding margins, CapEx intensity of running owned data centre amid high German energy prices, Concentration risk in Germany/DACH region, Founder/family GmbH structure limits access to external equity capital, No public bond rating; refinancing depends on bank relationships

Revenue by geography

Revenue by product/service

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