What Interstil does

Interstil, legally interstil Diedrichsen GmbH & Co. KG, is a German family-owned manufacturer founded on August 1, 1967 by Manfred Diedrichsen and Alfred Scharkowski, currently led by Manfred and Jens Diedrichsen and headquartered in Steinhagen, East Westphalia. The company designs, develops, and produces premium curtain hanging systems in-house, operating from a single integrated facility with more than 8,000 m² of production and storage capacity (expanded by 2,000 m² in 2020) and employing more than 100 people. Its five core product lines are the W-golfplooi (wave-fold) glider system, the F1 panel curtain system, binnenloopsystemen (inside-track traverse systems), classic gordijnroede (curtain rods in brass, iron, and stainless steel), and SMART.ELECTRIC motorized rails controllable via remote, smartphone, or voice. Differentiated IP includes the globally patented Integral system, which enables curtain rod spans more than 60% larger without intermediate supports, and the patented F1 panel system; the company also operates proprietary custom machine-building capability (CNC turning, 5-axis milling, programmable robotics) and has won more than 40 international design awards.

Interstil serves high-end residential, hospitality (hotels, resorts, restaurants, event venues), historic-preservation, and government/diplomatic clients, with a documented reference portfolio including Hotel Sly Berlin, the Hamacher Hotel Group, the Indonesian Embassy Residence in Berlin, and multiple castle-hotel renovations. Pricing is quote-based and custom-manufactured to specification, including custom bending, RAL color matching via its Colorservice, and bespoke engineering for unusual architectural situations. The company sells directly to specialized interior retailers (since 2010, no wholesale), runs a wholly-owned Benelux subsidiary (interstil benelux, established 2009 in Nieuwkuijk with a Culemborg showroom), distributes in the USA through JAB Anstoetz (since 2000), and partners with LEHA in Austria (since 1981). Geographic reach covers Germany, the Netherlands, Belgium, Austria, Switzerland, the UK, France, Spain, Luxembourg, and the USA. Revenue is not publicly disclosed, and the company remains a privately held German Mittelstand family business under direct Diedrichsen family control.

Name

Interstil

Legal name

interstil Diedrichsen GmbH & Co. KG

Website

https://interstil.nl

Company type

Private

Founded year

1967

Operating status

Operating

Headcount range

1–10 employees

Short description

Interstil is a German family-owned manufacturer founded in 1967 that designs and produces premium, custom-made curtain hanging systems (wave-fold, panel, traverse, rod, and motorized) in Steinhagen for high-end residential, hospitality, and historic-preservation clients across Europe and the USA.

Ownership category

akta.pro rank

Headquarters

HQ city

Steinhagen

HQ country

Germany

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Custom Curtain Mounting Systems: B2B and B2C sales of premium curtain rails, poles, and mounting systems. Products are custom-made to specification including custom bending services. Revenue generated from sale of hardware systems and associated accessories.
2. Specialized Solutions & Accessories: Sale of mounting accessories, gliders, brackets, and custom solutions for specific installation requirements.

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels5 records

Core offering

Interstil is a German manufacturer of premium curtain hanging systems, developing and producing curtain rails, traverse systems, curtain poles, wave pleat systems, panel curtain systems, and motorized curtain solutions entirely in-house at its Steinhagen facility. The company offers custom-made-to-order products in brass, stainless steel, and iron finishes, with proprietary patented technologies for large spans, smooth operation, and bespoke architectural configurations.

Product overview

Interstil is a German manufacturer of premium curtain hanging systems offering five core product lines: W-Golfplooi (wave-fold systems with patented glider technology), F1 Paneelgordijnsysteem (concealed panel curtain system), Binnenloopsystemen (traversing/track systems for smooth curtain operation), Gordijnroede (classic curtain rods in brass/iron/stainless steel), and SMART.ELECTRIC (motorized automated systems). The portfolio includes Accessories as supplementary components. All products are developed and manufactured in Steinhagen, Germany, and are distributed through specialized retailers. The company holds more than 40 international design awards and serves both residential and commercial projects including hotels, castles, embassies, and luxury homes worldwide.

Differentiator

Problem solved

Functional benefit

Products and services

• W-Golfplooi (Wave Pleat Curtain System) Wave-fold curtain hanging system featuring patented glider technology that guarantees perfect sinus-wave formations. Produces uniform, elegant curtains with optimal fabric distribution for contemporary interiors, available in flat 35mm and concave/convex profile variants.
• F1 Paneelgordijnsysteem (Panel Curtain System) Patented panel curtain system in which fabric attachment is concealed behind an elegant profile. Features an advanced lowering mechanism for maximum comfort when attaching and removing fabrics, with reduced expressive reflection to the essential.
• Binnenloopsystemen (Inside-Track Traverse Systems)

Quantifiable outcome

• Spans more than 60% larger without intermediate supports using Integral technology
• +3 more outcomes

Named customers13 records

Segments5 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Three partnerships are on record, tiered core.

• Ed Jansen van Doorn (Netherlands)coreStrategic or Co-development Partner · 1 January 2009First foreign subsidiary established in Netherlands in 2009, managed by Ed Jansen van Doorn. Custom-made garnitures for Dutch customers are manufactured in Steinhagen, Westphalia.
• JAB Anstoetz (USA)coreChannel Partner/ Reseller/ Distributor · 1 January 2000JAB Anstoetz, a textile publisher from Bielefeld, serves as Interstil's US distribution partner since 2000. JAB has a strong local distribution network. For the first time, Interstil custom-made garnitures and shipped directly to designers in the USA.
• LEHA (Austria)coreChannel Partner/ Reseller/ Distributor · 1 January 1981Successful cooperation with LEHA in Austria has continued to the present day since 1981. LEHA serves as key national wholesale partner.

Scale indicators6 records

Recent moves10 records

Expansion highlights3 records

Broad incumbents

• Hunter Douglas: Global leader in window coverings and architectural products including motorized shades and drapery systems through its Kirsch brand. Massive scale advantage and broader portfolio, but competes in similar commercial and residential specification channels for premium projects.
• Lutron Electronics: US leader in lighting control and motorized shading systems for residential and commercial applications. Competes with SMART.ELECTRIC in premium motorized curtain/shading integration, particularly in luxury residential and high-end commercial specification.
• Somfy: French global leader in motorized solutions for window coverings and smart home automation. Major player in motorized curtain/blind systems competing with Interstil's SMART.ELECTRIC line, with vastly larger R&D and ecosystem integration capabilities.

Direct peers

• Forest Group (Fores): Dutch manufacturer of curtain track systems, motorized curtain rails, and blind components. Directly comparable product portfolio including wave/glider systems and motorized solutions; competitor in the same European specification market.
• Silent Gliss: Swiss manufacturer of premium curtain track and blind systems with global distribution. The most direct comparable to Interstil in terms of premium positioning, custom-engineered curtain hardware, and focus on architects/interior designers. Both compete in the same specification-driven luxury and commercial projects.
• SWFcontract: Manufacturer of commercial-grade curtain track hardware, traverse systems, and accessories for hospitality and healthcare. Comparable to Interstil's traverse/track product line with overlap in hospitality specification work.
• Coulisse: Dutch manufacturer of window covering systems including motorized curtain tracks and blind components. Competes with Interstil in European specification channels and offers comparable motorized curtain hardware for residential and commercial projects.

Emerging players

• Kirsch: Established drapery hardware brand (now part of Hunter Douglas) offering curtain rods, traverse systems, and motorization. Comparable in core curtain hardware products though positioned more for mass-market and custom workrooms than Interstil's premium specification niche.
• Rowley Company: US-based drapery hardware supplier offering curtain rods, traverse systems, and custom fabrication services. Comparable in custom drapery hardware focus though serving a primarily North American market with less premium European positioning.

Others

• INPRO Corporation: US manufacturer of commercial interior architectural products including wall protection, curtain/track systems, and door hardware. Comparable in commercial-grade curtain hardware for healthcare, hospitality, and institutional specification channels.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/interistil
• LinkedInlinkedin.com/company/interstilbenelux

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Subsidiaries1 record

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 Interstil