What ISDD GmbH does

ISDD GmbH (Internet Shopping Duffner & Duffner) is a privately held German e-commerce company founded in 1997 by brothers Reiner Duffner and Claus-Stefan Duffner and headquartered in Schönwald im Schwarzwald. The company originally built websites for local hotels and tourism businesses, then pivoted in 2004 to online retail of authentic Black Forest cuckoo clocks, and in 2013 added traditional Erzgebirge (Ore Mountain) folk art and Christmas crafts as a second product vertical. It sells through a portfolio of owned multi-language storefronts covering 12 languages (German, English, French, Italian, Spanish, Portuguese, Dutch, Russian, Chinese, Japanese, Arabic) and maintains seller accounts on Amazon across 16+ country marketplaces and on eBay across 8+ countries.

The technology stack is a conventional multi-storefront e-commerce platform with no proprietary AI or ML components: payment processing is handled via PayPal and major credit cards through SSL-secured checkout, with Google Analytics for traffic measurement, Facebook and Google+ social plugins, and TeamViewer for remote customer support. Trust and authenticity signals include Trusted Shops certification held since 2009 across the main storefronts and membership since 2008 in the Verband die Schwarzwalduhr (VDS) Black Forest Clock Association. An exclusive outlet partnership with traditional clock manufacturer Adolf Herr (HerrZeit) since 2007 differentiates the catalog with a manufacturer-aligned brand.

The business model is direct-to-consumer product sales of low-velocity, higher-AOV niche collectibles, monetized through one-time transactions on owned storefronts and marketplace transactions on Amazon and eBay. Pricing is per-item, with a 2% prepayment discount for advance bank transfer, a flat EUR 4.00 domestic shipping fee within Germany, and destination/weight-based international shipping. The customer base is a long tail of individual consumers worldwide seeking authentic German souvenirs and traditional crafts, supplemented by a secondary reseller/SMB segment, with no anchor enterprise customers and no external funding or institutional ownership.

Name

ISDD GmbH

Legal name

ISDD GmbH

Website

https://isdd.de

Company type

Private

Founded year

1997

Operating status

Operating

Short description

ISDD GmbH is a privately held German e-commerce company founded in 1997 that sells authentic Black Forest cuckoo clocks and Erzgebirge folk art to individual consumers worldwide through 12-language owned storefronts plus Amazon (16+ countries) and eBay (8+ countries) marketplaces.

Ownership category

akta.pro rank

Headquarters

HQ city

Schönwald

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2C

Offering type

Digital Commerce or Content

Cost components

Supply Chain, Operations, Personnel, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Product Sales - Cuckoo Clocks and Black Forest Clocks: Direct sales of original Black Forest cuckoo clocks and wall clocks through owned online shops and marketplaces. Started in 2004 with 200 different original Black Forest cuckoo clocks. Multiple branded storefronts including cuckooclocks.com, cuckoo-clock.com.
2. Product Sales - Erzgebirge Crafts: Sales of traditional Erzgebirge (Ore Mountain) folk art and Christmas crafts through dedicated online shop launched in 2013. Available in German, English, French, Italian, Portuguese, and Spanish.
3. Marketplace Sales: Sales through Amazon (16+ country marketplaces including Germany, UK, France, Italy, Spain, US, Canada, Japan, Australia, Singapore, UAE, Saudi Arabia, Sweden, Poland, Netherlands, Turkey) and eBay (multiple countries). Merchant IDs provided for Amazon seller accounts.
4. Payment Processing: Accepts payment via advance bank transfer (with 2% discount), credit card (Mastercard, Visa, American Express with SecureCode), PayPal, and cash on delivery. Credit card data transmitted directly to payment companies, not stored.

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels5 records

Core offering

ISDD GmbH is a German e-commerce retailer selling authentic Black Forest cuckoo clocks, Black Forest wall clocks (including the exclusive Adolf Herr brand), and traditional Erzgebirge folk art and Christmas crafts directly to consumers worldwide. The company distributes through owned multilingual online storefronts in 12 languages, Amazon seller accounts in 16+ countries, and eBay stores in 8+ countries.

Product overview

ISDD GmbH is a German e-commerce company specializing in the online retail of traditional German products, particularly Black Forest cuckoo clocks and Erzgebirge folk art. The company operates a portfolio of multi-language e-commerce storefronts spanning 12+ languages, selling cuckoo clocks (via kuckucksuhr.net/cuckooclocks.com and related international domains), Black Forest clocks (via kuckucksuhr.de/cuckoo-clock.com), and Erzgebirge crafts (via erzgebirge-freude.de/erzgebirge.co.uk and related languages). The business model centers on a unified product offering distributed across multiple branded storefronts and marketplace channels (Amazon across 15 countries, eBay across 8 countries), with international sales being a core focus since the company's founding in 1997. In 2004, the company began with 200 cuckoo clock varieties and has since expanded to include exclusive brands like Adolf Herr, positioning itself as a specialist in authentic German souvenirs and timepieces for global markets.

Differentiator

Problem solved

Functional benefit

Products and services

• Kuckucksuhren / Cuckoo Clocks Multi-Language Online Shop Multi-language e-commerce platform selling Black Forest cuckoo clocks, available across 12 languages including German, English, French, Italian, Spanish, Portuguese, Dutch, Japanese, Chinese, Russian, and Arabic.
• Schwarzwalduhren / Black Forest Clocks Online Shop Online shop for Black Forest wall clocks and timepieces, including the exclusive Adolf Herr (HerrZeit) brand of cuckoo clocks, available in German and English.
• Erzgebirgische Volkskunst / Erzgebirge Folk Art Online Shop Online shops for traditional Erzgebirge (Ore Mountain) folk art and Christmas craft products, available in German, English, French, Italian, Portuguese, and Spanish.
• Amazon Marketplace Stores Active seller accounts across 16+ Amazon country marketplaces including Germany, UK, France, Italy, Spain, US, Canada, Mexico, Japan, Australia, Singapore, UAE, Saudi Arabia, Sweden, Poland, Netherlands, and Turkey, selling the same Black Forest clock and folk art catalog.
• eBay Stores Multi-country eBay store presence across Germany, UK, France, Italy, Spain, US, Canada, and Australia under the ISDD-Kuckucksuhren seller account, selling the same Black Forest clock and folk art catalog.

Named customers2 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration8 records

Partnerships

Five partnerships are on record, tiered core and minor.

• Adolf Herr (HerrZeit)coreStrategic or Co-development PartnerExclusive outlet shop partner for Adolf Herr brand cuckoo clocks. Launched dedicated branded storefronts: www.cuckoo-clock.com (English) and www.kuckucksuhr.de (German) in 2007, with complete redesign completed in 2020. Adolf Herr is a traditional Black Forest clock manufacturer.
• Trusted ShopscoreTechnology or IntegrationE-commerce trust and buyer protection platform integration. Provides certification badges, verified customer reviews, and buyer guarantees for all main storefronts since 2009. URLs: trustedshops.com profiles for kuckucksuhr.net (XACDC6962BAFBC82CB22EB180E91C92EA), erzgebirge-freude.de (X0DD52E243A0D3507DF4A337F3BCC4E41), kuckucksuhr.de (XF7DCDF795ABCC5FBB3B20E1D9D06B291).
• Black Forest Clock Association (VDS)minorStrategic or Co-development PartnerIndustry association membership since 2008. VDS (Verband die Schwarzwalduhr) is the official association for authentic Black Forest clocks. Website: www.black-forest.org and www.v-ds.org.
• AmazoncoreChannel Partner/ Reseller/ DistributorMulti-country marketplace seller. Active seller accounts across 16+ Amazon marketplaces including Germany, UK, France, Italy, Spain, US, Canada, Japan, Australia, Singapore, UAE, Saudi Arabia, Sweden, Poland, Netherlands, Turkey. Multiple merchant IDs for different regional accounts.
• eBaycoreChannel Partner/ Reseller/ DistributorInternational marketplace seller with storefronts across Germany, UK, France, Italy, Spain, US, Canada, and Australia under ISDD-Kuckucksuhren seller account.

Scale indicators3 records

Recent moves17 records

Expansion highlights4 records

Broad incumbents

• Houzz: Home design marketplace combining content and home decor retail across clocks and decorative items, creating adjacent competitive pressure for ISDD's collectible clocks and traditional decorative offerings.
• Wayfair: Major home decor and furnishings retailer carrying clocks and decorative items at scale, representing a broader competitive set for ISDD's wall clocks and traditional decorative categories.
• Amazon Handmade: Amazon's dedicated handmade/handcraft marketplace that includes cuckoo clock and German folk art sellers, offering broader assortment and Prime fulfillment that create competitive pressure on ISDD's specialty positioning.

Direct peers

• Etsy: Global online marketplace for handmade and vintage goods, hosting numerous cuckoo clock and German folk art sellers that directly compete with ISDD's core offering and serve overlapping collectibles and gift buyers across international markets.
• Black Forest Imports: US-based specialty e-commerce retailer focused on authentic Black Forest cuckoo clocks and German timepieces, directly comparable to ISDD's flagship product line and serving North American buyers seeking the same category.
• Erzgebirge-Palast: German e-commerce retailer specializing in traditional Erzgebirge folk art and Christmas crafts, directly comparable to ISDD's secondary product line and serving similar German-heritage collectibles buyers across multiple European markets.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks5 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/isdd.de

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about ISDD GmbH