K.Line

What K.Line does

K•LINE is a French industrial manufacturer of aluminum fenestration products, headquartered in Les Herbiers (Vendée) and operating as a SAS (simplified joint-stock company). Founded in 1997, the company produces aluminum windows, French doors, sliding doors (baie coulissante and baie à galandage), entry doors across eight design collections (Surface, Caractère, Émotion, Lumière, Contemporaine, Prestige, Créative, Clarté), service doors, roller shutters, and Brise-Soleil Orientable (BSO) sun shades up to 4 meters in width. Thermal performance ranges from Ud 0.68 to Ud 1.6 across entry door models, with security differentiated by 5-point lock systems with two solid hooks. All products are manufactured in France, and the company positions itself as the French leader in industrial aluminum windows.

The technology stack centers on aluminum profile systems with proprietary finishing and a connected-product layer branded K•LINE Smart Home. Connected SKUs include the Fenêtre Pilotée, Coulissant Piloté, Porte à Ouverture à Distance, Détecteur de Verrouillage Intégré, Pack Alarme, and Occultations Pilotées, all controllable via a free mobile application. A digital configurator at maconfig.k-line.fr supports project visualization and lead generation. Notable smart-home features emphasize ease of use, interoperability, and security rather than AI-driven functionality.

K•LINE operates a pure channel-partner go-to-market: products are not sold direct to end consumers but exclusively through approximately 1,500 professional installer partners distributed across France, including a higher tier of "Expert Rénovateur" certified installers. Pricing is quote-based via this channel, and the company captures demand through its website's "Demander un devis" lead-capture, the configurator tool, social media (Instagram, Facebook, LinkedIn), and dedicated Pro and Prescripteur portals for installers and architects. End customers are predominantly residential homeowners undertaking renovation or new construction, served through SMB installer relationships. The company also maintains a long-running CSR partnership with the Initiatives-Cœur competitive sailing project, supporting Mécénat Chirurgie Cardiaque, with skipper Violette Dorange taking the helm in 2026 toward the Vendée Globe 2028.

Name

K.Line

Legal name

K•LINE

Website

https://k-line.fr

Company type

Private

Founded year

1997

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

K•LINE is a French manufacturer of aluminum windows, sliding doors, and entry doors, serving residential renovation and new-construction markets exclusively through a network of approximately 1,500 professional installer partners across France.

Ownership category

akta.pro rank

Product category

Aluminum Windows and Doors Manufacturing

NAICS

Metal Window and Door Manufacturing (332321), Blind and Shade Manufacturing (337920), Wiring Device Manufacturing (33593)

SIC

Metal Doors, Sash, Frames, Moldings & Trim (3442), Electronic & Other Electrical Equipment (No Computer Equip) (3600)

akta.pro primary industry

Exterior Doors (IMADAIAA)

akta.pro secondary industries

Interior Doors (IMADAIAB), Garage Doors & Rolling Shutters (IMADAIAE)

Keywords

• Aluminum windows
• Aluminum doors
• Sliding door systems
• Roller shutters
• Connected home accessories

Headquarters

HQ city

Les Herbiers

HQ country

France

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Aluminum Windows and Doors Sales: K•LINE generates revenue primarily through the sale of aluminum windows, French doors, sliding doors, pocket doors, and entrance doors. Products are sold through a network of ~1,500 professional installer partners who purchase from K•LINE and install for end customers. The company offers customization options including colors, finishes, and accessories.
2. Smart Home and Connected Accessories: Revenue from smart home products including the K•LINE Smart Home application, connected locks, alarm packs, and motorized occultation systems. These complementary products enhance the core window/door offerings.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels7 records

Core offering

K•LINE manufactures aluminum windows, French doors, sliding doors, pocket sliding doors, aluminum entry doors, service doors, and roller shutters — including connected/smart variants — at its Les Herbiers, France manufacturing facilities. Products are sold exclusively through a network of approximately 1,500 professional installer partners across France. The company also offers the K•LINE Smart Home connected ecosystem with alarm packs and integrated locking detectors for residential renovation and new construction projects.

Product overview

K.LINE is a French manufacturer of aluminum windows, doors, and sliding systems offering a comprehensive range of fenestration products organized into core mechanical products (windows, French doors, sliding doors, entry doors, service doors) and smart/connected versions integrated into the K.LINE Smart Home ecosystem. The product portfolio includes Fenêtres and Portes-fenêtres, Baies coulissantes and Baies à galandage, various Porte d'entrée aluminum collections (Surface, Caractère, Émotion, Contemporaine, Prestige, Créative, Lumière, Clarté), Coulissant Piloté, Fenêtre Pilotée, Volets roulants, Brise Soleil Orientable, and the K.LINE Smart Home platform with Détecteur de Verrouillage intégré and Pack Alarme. The ecosystem is supported by the maconfig.k-line.fr configurator tool.

Differentiator

Problem solved

Functional benefit

Brands

• K•LINE SMART HOME: Smart home solution enabling remote control and programming of connected home equipment via a mobile application.
• K•LINE Planet
• Initiatives-Coeur

Products and services

• Fenêtres et portes-fenêtres (Aluminum Windows and French Doors) Aluminum windows and French doors with hidden opening leaf technology, offered in both renovation and new construction variants; the connected Fenêtre Pilotée version enables remote control via the K•LINE Smart Home app. Sold exclusively through approximately 1,500 certified installer partners in France for residential projects.
• Ensembles composés et châssis spéciaux (Custom Composed Sets) Custom composed sets and special frames combining multiple window and door configurations for unique architectural projects. Sold exclusively through K•LINE's certified installer network in France for residential new construction and renovation.
• Baie coulissante (Aluminum Sliding Door) Large panoramic aluminum sliding doors offered in 2-rail and 3-rail configurations for seamless indoor-outdoor living spaces; the connected Coulissant Piloté variant enables remote operation via the K•LINE Smart Home app. Installed by certified K•LINE partners across France.
• Baie à galandage (Pocket Sliding Door) Aluminum sliding doors with a hidden-frame pocket system where the panels slide fully into the wall cavity for maximum opening width and unobstructed views. Designed for residential use, sold and installed by K•LINE's certified installer partner network.
• Porte d'entrée aluminium (Aluminum Entry Door) Aluminum entry doors available in modern, traditional, full glass, semi-glazed, and solid panel variants, organized into eight collections (Surface, Caractère, Émotion, Contemporaine, Prestige, Créative, Lumière, Clarté), with 70+ models and a connected Porte à Ouverture à Distance variant enabling remote opening via the K•LINE Smart Home app. Thermal insulation reaches Ud 1.3 with 5-point locking.
• Porte de service (Service Door) Aluminum service doors designed for secondary residential entrances such as utility rooms, garages, and side access points. Sold exclusively through K•LINE's certified installer partner network in France.
• Volets roulants (Roller Shutters) Aluminum roller shutters providing privacy, security, and thermal insulation for residential properties, available in standard and connected Occultations pilotées versions controllable via the K•LINE Smart Home app. Installed by K•LINE's certified partner network.
• Brise Soleil Orientable (BSO) - Adjustable Sun Shades Adjustable exterior aluminum sun shades with controllable blades for fine-tuned solar management, supporting widths up to 4 meters. Controllable via dedicated remote or the K•LINE Smart Home app, designed for residential properties with large glazed openings.
• Détecteur de Verrouillage intégré (Integrated Lock Detector) Built-in sensor that detects the locking status of connected K•LINE entry doors and reports through the K•LINE Smart Home app for residential security monitoring. Sold as part of the K•LINE smart home ecosystem.
• Pack Alarme (Alarm Pack) Integrated security alarm system connected to the K•LINE Smart Home ecosystem for comprehensive residential security monitoring, designed as part of the K•LINE smart home product line for French homeowners.

Quantifiable outcome

• Thermal insulation Ud values from 0.68 to 1.6 depending on door model
• +3 more outcomes

Named customers7 records

Segments4 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature11 records

Partnerships

One partnership is on record.

• Initiatives-CœurcoreStrategic or Co-development Partner · 1 January 2014Since 2014, K•LINE has partnered with Initiatives-Cœur, a competitive sailing project that combines sports performance with charitable commitment for Mécénat Chirurgie Cardiaque (a charity supporting children's heart surgery). The partnership began with skipper Tanguy de Lamotte, followed by Samantha Davies, and since 2026 Violette Dorange (revealed during Vendée Globe 2024-2025). K•LINE supports the project as part of its CSR commitment, particularly its family company values that made supporting children an obvious choice. Violette Dorange continues the adventure toward Vendée Globe 2028.

Scale indicators3 records

Expansion highlights5 records

Direct peers

• Tryba: Tryba is one of France's largest fenestration networks, manufacturing and installing PVC and aluminum windows and doors through a nationwide franchise model. Comparable residential positioning, multi-material offering, and channel-led distribution to K•LINE.
• Atlantem: Atlantem is a French industrial group covering windows, doors, roller shutters, and garage doors for residential renovation. Directly comparable fenestration portfolio and French installer-channel distribution to K•LINE.
• Profalux: Profalux is a French manufacturer of aluminum windows, doors, and roller shutters serving the residential market through an installer network. Direct overlap with K•LINE in aluminum windows, volets roulants, and French installer-channel distribution.
• Bel'm: Bel'm is a French specialist in residential aluminum and composite entry doors with broad model collections. Directly comparable to K•LINE's porte d'entrée range in product focus, customization depth, and French installer network.
• Bubendorff: Bubendorff is a leading French manufacturer of motorized roller shutters and connected home automation. Comparable to K•LINE's volets roulants and BSO offering, with a similar focus on French residential channels and connected shading.

Broad incumbents

• Reynaers: Reynaers is a Belgian-founded European leader in aluminum window, door, and façade systems with established distribution in France. Comparable aluminum system technology and product breadth, though with stronger commercial/architectural orientation than K•LINE.
• Somfy: Somfy is the French global leader in motors and smart-control systems for blinds, shutters, awnings, and connected home equipment. Comparable to K•LINE Smart Home on connected shading and security but positioned as an enabling supplier across many OEMs rather than a fenestration manufacturer.
• Schüco: Schüco is a global German manufacturer of aluminum and steel window, door, and façade systems active in France. Overlaps with K•LINE in aluminum fenestration but operates at much larger scale and broader commercial scope.
• Technal: Technal, owned by Norsk Hydro, is a major European aluminum building systems brand serving both residential and large commercial projects. Comparable aluminum fenestration technology, but with broader scope including commercial curtain wall that K•LINE does not address.

Regional players

• Aluk: Aluk is a UK-headquartered aluminum window and door systems supplier with growing presence in France and Southern Europe. Comparable aluminum system offering, but primarily serves different national markets and competes regionally rather than directly dominating French residential renovation.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/KLineFenetreLumiere
• LinkedInlinkedin.com/company/kline-france
• Instagraminstagram.com/kline_france
• Xx.com/kline_france

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 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 K.Line