What INOTHERM does

INOTHERM is a Slovenia-based, family-owned manufacturer of premium aluminium entrance doors, positioned as Europe's largest producer in its category. Founded in 1991 by Anton and Verica Šenk in a neighbour's garage making thermal insulation glass, the company evolved into a vertically integrated manufacturer with 44,000+ doors produced annually, 500,000+ cumulative units sold, and EUR 100 million turnover reached in 2025. Operations are centred on a 39,100 m² production complex spanning headquarters in Prigorica and a glass/coating facility in Ribnica.

The product portfolio comprises 400+ customisable door models across three lines — Exclusive, Select, and Premium — augmented by proprietary smart-access technology (Inosmart with fingerprint, Bluetooth, and mobile-app unlocking; the newer Touch Handle sensor system) and a complementary Vision aluminium windows line launched in 2026. Underlying technology relies on an exclusive SCHÜCO aluminium profile developed solely for INOTHERM, advanced thermal insulation with triple sealing, and standard 5-point security locking. Accessories span colours, glass, handles, locking mechanisms, and side elements, with CE marking and RAL-quality certification for insulating glass.

Revenue is generated primarily through B2B channels: an extensive partner network of 1,300+ sales distributors across 18 European countries (with Middle East reach) handles consultation, quotation, installation, and warranty service, supported by a direct-to-consumer online door configurator and a headquarters showroom. Approximately 95% of production is exported. Pricing is quote-based on made-to-measure configuration; 5% promotional discounts on Exclusive, Select, Premium and Vision lines run through August 2026 as part of the 35th-anniversary campaign. The company is currently led by second-generation CEO Nina Šenk Kosem alongside co-founder Anton Šenk, with no external investors or parent company involved.

Name

INOTHERM

Legal name

Inotherm d.o.o.

Website

https://inotherm.com

Company type

Private

Founded year

1991

Operating status

Operating

Short description

INOTHERM is a Slovenia-based, family-owned manufacturer of premium aluminium entrance doors, Europe's largest in its category, producing 44,000+ doors annually across 400+ models and serving residential and commercial customers in 18 European countries through a 1,300+ partner network.

Ownership category

akta.pro rank

Headquarters

HQ city

Dolenja Vas

HQ country

Slovenia

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Aluminium Entrance Doors: One-time sale of custom-manufactured aluminium entrance doors. Doors are made-to-measure with extensive customization options including colors, glass elements, handles, and accessories. 95% of production is exported to European markets.
2. Entrance Door Accessories: Accessories including handles, locking mechanisms, colors, glass, and other door components sold alongside main products.
3. Vision Aluminium Windows: Expansion into aluminium windows announced in 2026 as part of one-stop shop strategy for doors and windows.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels6 records

Core offering

INOTHERM designs, manufactures, and sells custom-made aluminium entrance doors across three core ranges (Exclusive, Select, Premium) plus communal, arched, and custom front door variants. The company also offers a Vision aluminium windows line, Inosmart and Touch Handle smart-locking technologies, and a full accessory ecosystem of colours, glass, handles, and locking hardware, all produced in-house in Slovenia.

Product overview

INOTHERM is Europe's largest manufacturer of aluminium entrance doors, offering a comprehensive portfolio of 400+ customizable entrance door models across three main product lines: Exclusive (most popular, superior stability and security), Select (larger glass panels with excellent insulation), and Premium (luxury large-format doors). The product ecosystem includes smart door technology (Inosmart with fingerprint/Bluetooth/app unlocking, and Touch Handle), complete accessories (colours, glass, handles, locking), and extends into aluminium windows (Vision). All products are manufactured in Slovenia with proprietary profile systems developed with German partner SCHÜCO.

Differentiator

Problem solved

Functional benefit

Brands

• Exclusive: The EXCLUSIV range is Inotherm's most popular line, including structurally and aesthetically sophisticated models that offer superior static stability, security, insulation and longevity at an attractive price.
• Premium
• Select
• Inosmart

Products and services

• Exclusive Entrance Door Line INOTHERM's flagship aluminium entrance door line of structurally and aesthetically sophisticated models offering superior static stability, security, insulation, and longevity at an attractive price; targeted at premium residential and commercial buyers.
• Select Entrance Door Line Entrance door range featuring larger glass panels while maintaining first-class insulating performance; targeted at homeowners who want more daylight and transparency without sacrificing insulation.
• Premium Entrance Door Line Luxury-segment aluminium entrance doors featuring large-format designs with flush-mounted leaves and side elements that combine premium design and thoughtful construction; aimed at high-end residential and commercial projects.
• Custom Front Doors Bespoke aluminium entrance doors customised to individual customer specifications for unique architectural requirements, configured via the online door configurator with a fa\u00e7ade photo upload.
• Communal Entrance Doors Aluminium entrance doors designed for communal buildings and multi-unit residential properties, built for high-traffic durability and consistent security.
• Arched Front Doors Specially designed aluminium entrance doors with arched configurations for unique architectural openings.
• Vision Aluminium Windows Aluminium windows developed in-house as part of INOTHERM's one-stop shop strategy for doors and windows; launched to complement the entrance door range for residential and commercial projects.
• Inosmart Smart Door Unlocking System Intelligent door opening system sold as an add-on to INOTHERM aluminium entrance doors, featuring fingerprint sensor, Bluetooth technology, code keypad, mobile app control, and wireless remote unlocking for up to three unlocking methods.
• Entrance Door Accessories Complete range of door accessories including colours (Standard, Metallic, Matte, Deep Matte, Wood Decor, Design Decor), glass options, handles, locking mechanisms, and other hardware components sold alongside INOTHERM entrance doors.

Quantifiable outcome

• Over 500,000 satisfied users trust Inotherm doors in their homes
• +2 more outcomes

Named customers4 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

One partnership is on record.

• SCHÜCOcoreTechnology or IntegrationGerman profile system manufacturer SCHÜCO produces exclusive aluminium profiles for Inotherm based on specifications developed in Inotherm's own R&D departments. Inotherm holds exclusive rights to use this profile system, which provides superior door stability especially under temperature extremes. This proprietary profile is a key differentiator for Inotherm's aluminium entrance doors.

Scale indicators9 records

Recent moves8 records

Expansion highlights6 records

Broad incumbents

• Schüco: German global leader in aluminium and steel window/door/façade systems. Inotherm's exclusive profile partner and a key comparable as a systems manufacturer whose profiles are integrated into premium entrance doors across Europe.
• Hörmann: Germany-based global market leader in doors and gates (including aluminium and steel entrance doors) with far broader product portfolio and revenue scale. Highly comparable as a premium European entrance-door incumbent competing in similar B2B channel and specification-driven projects.

Direct peers

• Finstral: South Tyrol-based family-owned manufacturer of premium aluminium windows and entrance doors. Directly comparable to Inotherm in product mix, premium positioning, vertically integrated in-house production, and family-controlled governance.
• Aluprof: Polish manufacturer of aluminium systems for windows, doors, and façades. Comparable as a large-scale European aluminium systems supplier serving B2B partners with a broad product portfolio across entrance doors, windows, and roller shutters.
• Aliplast: Belgian/Polish aluminium systems manufacturer producing profiles for windows, doors, and façades. Comparable as an aluminium profile-based entrance door systems supplier serving European B2B fabricators and dealers.
• Ponzio: Polish aluminium systems brand supplying profiles for windows, doors, and façades across Europe. Comparable as an aluminium profile systems supplier feeding the B2B partner/fabricator channel for premium entrance doors.
• Wiśniowski: Polish family-owned manufacturer of gates, doors, windows, and fencing with strong European distribution. Comparable to Inotherm in premium metal door manufacturing, family-controlled governance, and partner-led B2B distribution model.
• Reynaers Aluminium: Belgian manufacturer of aluminium systems for windows, doors, curtain walls, and sliding doors. Comparable as a premium aluminium profile-based door systems supplier with strong European partner-network distribution and B2B specification channel.
• Heroal: German family-owned manufacturer of aluminium window, door, and roller shutter systems. Comparable as a premium aluminium systems supplier for residential and commercial entrance solutions distributed through European partner networks.
• Internorm: Austria-headquartered Europe's largest window brand, now expanding into aluminium entrance doors. Closely comparable as a premium aluminium-based façade product manufacturer selling through dealer networks across Europe with strong energy-efficiency positioning.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/@INOTHERMdoors
• LinkedInlinkedin.com/company/inotherm-doors
• Instagraminstagram.com/inotherm_entrance_doors

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 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 INOTHERM