What Sky-Frame does

Sky-Frame AG is a Swiss, family-owned manufacturer of premium frameless sliding door and window systems, headquartered in Frauenfeld, Switzerland, with approximately 200 employees and wholly-owned subsidiaries in the United States (Culver City, California), the United Kingdom (London), Austria (Vienna), and Italy (Milan). The company was founded by Beat Guhl, who co-founded the metalworking firm R & G Metallbau AG in 1993 and developed the first Sky-Frame system, installed and patented in 2002; Sky-Frame AG was established as a standalone entity in 2015. All engineering and manufacturing takes place in Switzerland under 'Swiss-made' standards, with production and development co-located at the Frauenfeld headquarters.

The company's product portfolio comprises four core systems — Classic (rectilinear), Arc (curved), Slope (inclined), and Pivot (pivot door) — combined with three glazing technologies: Sky-Frame 1 (single-glazed, 12mm), Sky-Frame 2 (double-glazed, 30mm), and Sky-Frame 3 (triple-glazed, 54mm, Minergie-P passive-house certified). An extensive set of add-on modules extends the offering: Drive (electric operation), Fly (retractable insect screen), Guard (burglar resistance), Gun (ballistic resistance), Sun (venetian blind shading), Pocket (wall-cavity concealment), Inline (fixed-glass connector), Touch (encrypted wireless control), plus the Hurricane line (HVHZ-certified for the US high-velocity hurricane zone). The portfolio carries certifications including ISO 9001, ISO 14001, UL 325, PAS 24, NFRC, Qualicoat/Seaside, Florida Product Approval, and HVHZ.

Sky-Frame generates revenue through one-time project-based sales of configured systems to luxury residential clients, premium commercial projects (boutique hotels, high-rise apartments), and architects/interior designers who specify the products, supported by professional installation services delivered through trained and authorized sales partners. Pricing is quote-based and not publicly disclosed, with no subscription or recurring revenue component. The company reaches customers through a hybrid model combining direct sales via its own branches and showrooms (London, Vienna, Culver City) with an extensive authorized distributor network spanning 24+ countries and six continents, accumulating 15,000+ installations globally since 2002. Notable architect relationships include BIG (Bjarke Ingels Group), Isay Weinfeld, Steven Harris Architects, Oppenheim Architecture, and Gianni Botsford Architects. Following the July 2025 succession of founder Beat Guhl by Angelo Razzino, the company is led by a four-person Executive Board (CEO, CFO, CMO, COO) with stock-option plan participation.

Name

Sky-Frame

Legal name

Sky-Frame AG

Website

https://sky-frame.com

Company type

Private

Founded year

2002

Operating status

Operating

Headcount range

101–250 employees

Short description

Sky-Frame is a Swiss, family-owned manufacturer of premium frameless sliding door and window systems, serving luxury residential, premium commercial, and architectural specification markets across 24+ countries via direct branches and authorized distributors, with all production based at its Frauenfeld headquarters.

Ownership category

akta.pro rank

Product category

Architectural Glazing Products

NAICS

Metal Window and Door Manufacturing (332321)

SIC

Metal Doors, Sash, Frames, Moldings & Trim (3442)

akta.pro primary industry

Exterior Doors (IMADAIAA)

akta.pro secondary industries

Storefronts, Curtain Wall & Window Wall Systems (IMADAIAG), Screens, Storm Doors/Windows & Insect Protection Systems (IMADAIAK), Interior Doors (IMADAIAB)

Keywords

• Frameless sliding doors
• Architectural glazing systems
• Minimalist window design
• Flush-fit windows
• Luxury glass facades

Headquarters

HQ city

Frauenfeld

HQ country

Switzerland

HQ region

Europe

Offices6 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Premium Frameless Sliding Window Systems: Sky-Frame generates revenue through the sale of its premium frameless sliding window systems, including four main product lines (Classic, Arc, Slope, Pivot) and three glazing technologies (1, 2, 3). Products are individually configured per project and sold with optional add-on features (Drive, Fly, Guard, Gun, Sun, Pocket, Inline, Hurricane). Revenue is primarily one-time product and installation revenue with professional services for consultation and project completion.
2. Professional Installation Services: Sky-Frame provides professional installation through trained and authorized sales partners who have received training in accordance with Swiss guidelines.

Pricing tiers

Go-to-market motion1 record

Distribution channels5 records

Marketing channels8 records

Core offering

Sky-Frame designs, engineers, and manufactures premium frameless sliding door and window systems flush-fitted with floor and ceiling, eliminating visible frames for seamless indoor-outdoor transitions. The Swiss-made product line covers rectilinear (Classic), curved (Arc), inclined (Slope), pivot (Pivot), hurricane-rated (Hurricane), and seamless floor-transition (Plain) configurations, available in single, double, and triple-glazed options, and configured per project for luxury residential and high-end commercial architecture.

Product overview

Sky-Frame is a Swiss manufacturer of premium frameless sliding window systems, offering a modular portfolio of architectural glazing products. The core offering consists of four main sliding window systems: Sky-Frame Classic (rectilinear sliding door), Sky-Frame Arc (curved sliding door), Sky-Frame Slope (inclined sliding door), and Sky-Frame Pivot (pivot door), plus Sky-Frame Hurricane (hurricane-resistant variant) and Sky-Frame Plain (seamless floor transition). These systems are available with three glazing technologies: Sky-Frame 1 (single-glazed, 12mm), Sky-Frame 2 (double-glazed, 30mm), and Sky-Frame 3 (triple-glazed, 54mm with Minergie-P certification). The product portfolio is enhanced by add-on modules including Sky-Frame Drive (electric drive), Sky-Frame Fly (insect screen), Sky-Frame Guard (burglar protection), Sky-Frame Gun (ballistic protection), Sky-Frame Sun (shading), Sky-Frame Pocket (hidden sliding), Sky-Frame Inline, and Sky-Frame Touch (smart control button). All products are engineered and manufactured in Switzerland at the Frauenfeld headquarters.

Differentiator

Problem solved

Functional benefit

Products and services

• Sky-Frame Classic Base rectilinear frameless sliding door system with insulating glass units and aluminium or glass-fibre-reinforced plastic (GRP) perimeter sections, flush-fitted in floor and ceiling with minimal rolling resistance.
• Sky-Frame Arc Curved sliding door system with radiused glass units enabling bold curvilinear architectural shapes, optionally available with electric drive.
• Sky-Frame Slope Inclined sliding door with angled glass units extending into the room or projecting outward, featuring a special bearing assembly for vertical and horizontal force compensation.
• Sky-Frame Pivot Pivot door with asymmetrically positioned axis, mechatronic multipoint locking, opening via key, badge, or fingerprint, with minimal 40mm visible width.
• Sky-Frame Hurricane Hurricane-certified frameless sliding windows with HVHZ certification per Florida Building Code, design pressure up to 3.6 kN/m² (75 psf), with panels up to 2.3m x 3.5m.
• Sky-Frame Plain Flush-fitted floor transition system with only 10mm floor opening; interior flooring continues between tracks for seamless indoor-outdoor transitions.
• Sky-Frame Drive Electric drive concealed in ceiling section enabling near-silent automated operation of sliding panels at the press of a button or via remote control.
• Sky-Frame Fly Retractable insect screen that fully retracts into the frame when not in use, using tear-resistant Vectran fibre tension cords.
• Sky-Frame Guard Burglar-resistant option with laminated safety glass, reinforced hardware, integrated alarm sensors, and multi-point locking.
• Sky-Frame Pocket Door elements slide completely into the wall cavity when opened, allowing rooms to be opened with no visible glass leaves.
• Sky-Frame Touch Control button integrated into the locking handle for convenient opening and closing of sliding windows using the SI-1000 electric drive, featuring encrypted wireless connection and LED feedback.
• Project Consultation and Specification Service Initial video or phone consultation with Sky-Frame advisors covering project requirements, technical options, and configuration guidance for architects and clients.
• Professional Installation by Authorized Sales Partners Professional installation service delivered through Sky-Frame's globally trained and authorized sales partner network.

Quantifiable outcome

• Up to 44 dB sound reduction with Sky-Frame 3
• +4 more outcomes

Named customers7 records

Segments4 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature11 records

Partnerships

Three partnerships are on record, tiered regional and core.

• Alco Glass Systems Ltd.regionalChannel Partner/ Reseller/ Distributor · 1 August 2020UK distribution partner operating from Amersham, HP6 6AA. Longstanding premium partner of Sky-Frame in the United Kingdom.
• Cantifix Ltd.regionalChannel Partner/ Reseller/ Distributor · 1 August 2020UK distribution partner operating from Unit 22, Garrick Industrial Centre, Irving Way, London NW9 6AQ. Longstanding premium partner of Sky-Frame in the United Kingdom.
• Universities and Research InstitutescoreStrategic or Co-development PartnerSky-Frame cooperates with universities and research institutes to continuously develop new innovative solutions for visionary spatial concepts. This research partnership enables the development of new product innovations and maintains technological leadership in architectural glazing.

Scale indicators6 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• Vitrocsa: Swiss minimalist frameless sliding window manufacturer with similar ultra-premium positioning, serving luxury residential and architectural projects worldwide. Closest direct comparable due to Swiss origin, minimal-frame aesthetic, and overlapping architect specification channel.
• NanaWall: U.S.-based manufacturer of large-format operable glass walls (sliding and folding) for luxury residential and commercial projects. Directly comparable via product format (large panels opening indoor-outdoor) and target segment (architect-specified premium projects).
• LaCantina Doors: Manufacturer of premium folding and sliding door systems for indoor-outdoor living, distributed through architect-facing channels in North America. Comparable in product type and architectural specification channel.
• Western Window Systems: U.S. manufacturer of multi-slide and pivot glass door systems for residential and light commercial projects with minimalist architectural aesthetic. Comparable in large-format sliding and pivot door format and architect-driven GTM.
• Solar Innovations: Manufacturer of custom architectural glazing including sliding glass doors, skylights, and conservatories. Comparable as a niche premium architectural glazing specialist serving luxury custom projects.
• Panoramic Doors: Manufacturer of large-format frameless sliding door systems designed for panoramic views and indoor-outdoor transitions. Comparable in frameless sliding system format and target use case.

Broad incumbents

• Schüco: Large German manufacturer of premium aluminum window, door, and façade systems for commercial and high-end residential projects globally. Comparable on product category and premium positioning though Schüco offers full window and façade portfolios versus Sky-Frame's specialization.
• Reynaers Aluminium: Belgian manufacturer of premium aluminum window, door, and curtain wall systems for residential and commercial projects worldwide. Comparable via premium aluminum-framed architectural systems serving architects, though much broader portfolio than Sky-Frame.
• Marvin Windows and Doors: U.S. manufacturer of premium wood, fiberglass, and aluminum-clad windows and doors for luxury residential and architect-specified projects. Comparable via premium positioning and architect-led specification model, though broader portfolio (no specialization in frameless systems).
• Aluk Group: International manufacturer of aluminum window, door, and curtain wall systems headquartered in Italy with global distribution. Comparable on premium aluminum system category though broader product scope.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/user/SkyFrame2013
• Facebookfacebook.com/SkyFrame
• LinkedInlinkedin.com/company/sky-frame-ag
• Instagraminstagram.com/skyframe_global
• Pinterestpinterest.ch/skyframeCH
• Xx.com/skyframe_global

Compliance12 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles18 records

Subsidiaries4 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 Sky-Frame