Alkuba

What Alkuba does

Kötter+Siefker GmbH & Co. KG, operating under the sub-brand Alkuba, is a German specialty wholesaler (Fachgroßhändler) founded in 1969, headquartered in Lotte with regional offices in Bremen, Magdeburg, and Bernburg. The company focuses on barrier-free accessibility solutions, with its core proprietary product being the Alkuba Treppenschranke (stair barrier) — a fall-prevention system featuring damped closing, emergency-exit compatibility, optional RWA (smoke-detector) automation, and modular 750–1000 mm lengths. Its proprietary Raumspartür (barrier-free space-saving door) features a patented band system certified to DIN barrier-free standards, requiring only one-third the swing clearance of a conventional door. The portfolio is rounded out with distributed third-party brands including Alltec aluminum wheelchair ramps and three HEWI bathroom-accessibility series (Care, Wahlleistung premium care, and Warm Touch).

The business model is a multi-channel wholesale and distribution operation. The company sells to Private Individuals, Nursing & Care Facilities, Commercial/Trade (Gewerbe), and Craftspeople/Planners/Builders via an owned e-commerce shop (shop.ks-info.com), the OXOMI catalog portal, telephone/email consultation, and in-person consultation at four German locations. Revenue is generated primarily through one-time hardware sales and project-based quotes — there is no disclosed recurring or SaaS component, and no public price list. The company operates as a private German GmbH & Co. KG (limited partnership) with 11–50 employees and no disclosed institutional, venture, or private-equity ownership. As a mid-sized German Mittelstand-style business, Kötter+Siefker combines a long-established specialty wholesale network with proprietary accessibility products targeting fall prevention, mobility support, and DIN-compliant barrier-free construction.

Name

Alkuba

Legal name

Kötter+Siefker GmbH & Co. KG

Website

https://alkuba.de

Company type

Private

Founded year

1969

Operating status

Operating

Headcount range

11–50 employees

Short description

Kötter+Siefker (Alkuba sub-brand) is a German specialty wholesaler founded in 1969 selling barrier-free accessibility hardware — including the proprietary Alkuba Treppenschranke stair barrier and Raumspartür space-saving door, plus distributed Alltec ramps and HEWI bathroom aids — to tradespeople, care facilities, and private consumers across Germany.

Ownership category

akta.pro rank

Headquarters

HQ city

Berlin

HQ country

Germany

HQ region

Europe

Offices4 records

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Product Sales (Online Shop): Direct B2B and B2C sales of accessibility products including stair barriers, threshold bridges, ramps, bathroom safety aids, and space-saving doors through their online shop portal.
2. Specialty Wholesale (Fachgroßhandel): Wholesale distribution of wood, plastic, and metal products and building elements serving craftspeople, planners, and builders in Germany.
3. Catalog/Download Sales: Product catalogs and technical documentation available through OXOMI catalog portal for download.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels8 records

Core offering

Alkuba specializes in providing assembly of aluminum frames, assistance in discussions with architects, and training services, while operating as a specialty wholesaler of barrier-free accessibility solutions including the proprietary Alkuba Treppenschranke stair barrier, threshold bridges, wheelchair ramps, space-saving doors, and HEWI bathroom safety aids. The product portfolio is sold through an online shop and a four-location wholesale network across Germany, targeting tradespeople, planners, builders, care facilities, commercial enterprises, and individual consumers.

Product overview

Kötter+Siefker is a specialist building materials distributor offering a portfolio of barrier-free accessibility solutions, primarily organized around the core Alkuba Treppenschranke (stair barrier) product line alongside complementary systems. The portfolio spans the Alkuba stair barrier (a proprietary fall-prevention barrier with optional RWA automation), threshold and wedge bridge systems, wheelchair ramps (via the distributed Alltec brand), and a range of bathroom accessibility fixtures (via the HEWI brand, spanning the Care, Wahlleistung, and Warm Touch series). Additionally, Kötter+Siefker offers barrier-free space-saving doors, grab bars, folding support grips, and shower seats. Products are available through a B2B online shop and catalog portal, targeting tradespeople, planners, and builders in private, care, and commercial sectors.

Differentiator

Problem solved

Functional benefit

Brands

• Alkuba: Product sub-brand referenced in Treppenschranke (stair gate) catalog under barrier-free living solutions

Products and services

• Alkuba Treppenschranke (Stair Barrier) Stair barrier providing fall prevention at stairs, ramps, and transitions with damped closing, minimal obstruction of escape routes, optional RWA (smoke detector) automation, and customizable lengths from 750 to 1000 mm in 50 mm increments with right/left-side mounting or freestanding column options. For residential, care, and commercial buildings.
• Alltec Wheelchair Ramps and Loading Aids Aluminum wheelchair ramps and loading aids enabling safe and comfortable access for wheelchair users and individuals with walking aids over height differences in both indoor and outdoor settings.
• HEWI Care Series Bathroom Fixtures Accessible bathroom solutions including folding support grips (Klappstützgriffe), shower seats (Duschsitze), and grab bars (Haltegriffe) that provide reliable support and enhance safety in showers, bathtubs, and WC areas with ergonomic designs and stable constructions.
• HEWI Wahlleistung (Premium Care) Series Advanced accessible bathroom fixtures and accessories for enhanced comfort and safety in care environments, offering premium accessibility solutions.
• HEWI Warm Touch Series Accessible bathroom fixtures featuring warm-to-the-touch materials that combine functional accessibility support with an appealing design aesthetic.
• Threshold Bridges, Wedge Bridges, and Ramps Threshold bridges, wedge bridges, and ramps that enable safe, barrier-free transitions over small height differences such as door thresholds, reducing trip hazards and facilitating use of rollators and wheelchairs in indoor and outdoor areas.
• Barrier-Free Raumspartür (Space-Saving Door) Barrier-free space-saving (pocket) door with universal design requiring only one-third of the swing space of a conventional door, certified DIN barrier-free, featuring a patented hinge system for long-lasting quality and enhanced safety, ergonomically designed for wheelchair users.
• Grab Bars, Folding Support Grips, and Shower Seats Practical bathroom accessibility aids including folding support grips, shower seats, and grab bars providing stability and fall prevention in showers and bathtubs, combining functional safety with modern design for barrier-free and age-appropriate bathrooms.

Quantifiable outcome

• Stair barrier lengths customizable from 750 to 1000 mm in 50 mm steps
• +1 more outcomes

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Two partnerships are on record, tiered minor.

• Alltec (Rollstuhl-Rampen und Auffahrhilfen)minorOthersAlltec provides wheelchair ramps and loading aids made from aluminum, featured in Kötter+Siefker's catalog portfolio. Products are distributed through Kötter+Siefker's sales channels in Germany.
• HEWI (Sanitärbereich)minorOthersHEWI provides bathroom accessibility products including Klappstützgriffe (folding support grips), Duschsitze (shower seats), and Haltegriffe (grab bars). Multiple HEWI product lines are distributed: HEWI Care, HEWI Wahlleistung, and HEWI Warm Touch. Products are featured in Kötter+Siefker's catalog offerings for barrier-free bathrooms.

Scale indicators2 records

Recent moves6 records

Expansion highlights4 records

Direct peers

• HEWI Heinrich Wilke GmbH: HEWI is a German manufacturer of barrier-free bathroom and accessibility products (folding support grips, shower seats, grab bars) — the same HEWI product lines (Care, Wahlleistung, Warm Touch) that Kötter+Siefker distributes. Direct partner and category competitor with overlapping accessibility product focus.
• Lifta GmbH: Lifta is a leading German stairlift manufacturer and accessibility specialist with strong German market presence. Direct competitor in the mobility/accessibility retrofit space, particularly for elderly and mobility-impaired customers.
• Alltec GmbH: Alltec manufactures aluminum wheelchair ramps and loading aids distributed by Kötter+Siefker. Direct partner competing in the same wheelchair-access ramp category with comparable materials and use cases.

Broad incumbents

• Drive DeVilbiss Healthcare: Drive DeVilbiss is a global broad-line manufacturer of mobility and accessibility products (wheelchairs, ramps, bathroom safety) competing for institutional care-facility buyers and home accessibility customers served by Kötter+Siefker.
• Handicare Group AB: Handicare is a major European accessibility solutions provider offering stairlifts, patient lifts, and bathroom safety products. Broader portfolio than Kötter+Siefker but directly competes for the same accessibility retrofit and barrier-free living customer base.
• ThyssenKrupp Access (TK Access Solutions): ThyssenKrupp Access Solutions manufactures stairlifts, platform lifts, and home accessibility products — a large established incumbent with overlapping barrier-free living solutions for residential and commercial buildings.
• Sunrise Medical GmbH: Sunrise Medical manufactures wheelchairs and mobility equipment including accessible bathroom aids. Broad incumbent overlapping with Kötter+Siefker's wheelchair-ramp and barrier-free product categories for care facilities and home users.
• Geberit AG: Geberit is a major European sanitary systems manufacturer whose portfolio (including the acquired Hüppe brand) covers barrier-free bathroom installations. Broad incumbent in the same end-customer use cases (accessible bathrooms) that Kötter+Siefker addresses via HEWI distribution.

Regional players

• Sanitätshaus (Medical Supply) Specialists — e.g., reha team: German Sanitätshaus chains and rehateam-style regional medical supply distributors serve overlapping customers (elderly, mobility-impaired) with comparable accessibility products including ramps, grab bars, and stair safety solutions. Regional specialist competing in adjacent channels.

Others

• Hettich Holding GmbH & Co. KG: Hettich is a major German furniture and building hardware manufacturer with adjacent door, hinge, and barrier-free product categories. Comparable as a German Mittelstand hardware specialist serving the same tradespeople and builder customer base that Kötter+Siefker reaches through its wholesale distribution network.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/p/K%C3%B6tter-Siefker-GmbH-und-CoKG-61563349439322
• LinkedInlinkedin.com/company/koetterundsiefker
• Instagraminstagram.com/koetterundsiefker

Revenue estimate

Valuation estimate

Number of profiles

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 Alkuba