Klein
KLEIN is a 1931-founded Spanish architectural hardware manufacturer producing proprietary sliding, folding, swing, and exterior enclosure door systems, sold directly to architects, designers, and professional installers globally through request-for-quote specifications and project sales.
- Company typePrivate
- Founded1931
- HeadquartersEast Rutherford, United States
- Headcount1–10
- GTM typeB2B
- OfferingHardware or Manufacturing
What Klein does
KLEIN is a privately held architectural hardware manufacturer specializing in interior space partitioning systems, founded in 1931 and headquartered in Montcada i Reixac, Barcelona, Spain, with a North American operations office in East Rutherford, New Jersey. The company's product portfolio comprises proprietary sliding, folding, swing, and exterior enclosure hardware systems, organized around named product lines including the NATURE wooden sliding door system with concealed mechanisms, the SK GLASS sliding glass system with proprietary KBS closure, the EXTENDO telescopic glass hardware, and the LITE PAR & FOLD compact multi-leaf folding hardware. KLEIN also offers component-level products such as tracks, kits, and closet door hardware.
The business operates a direct-to-professional model: architects, designers, and installers access technical resources, download specifications and technical drawings via a specs tool, and request quotes through the company website. Revenue is generated through hardware system sales delivered as complete kits for professional installation. Customer references span hospitality (Moods Catedral Hotel, Houghton Hotel), commercial coworking (OneplaceBCN), and government social housing — the latter being a finalist for the Mies Van der Rohe Architecture Award. Marketing is concentrated in content via the website, an email newsletter, and a dedicated professional portal with installer services. Distribution is global, anchored by the European manufacturing facility and the US regional office, with no disclosed external investors, funding rounds, or public listing.
Klein firmographics
Firmographics- Name
- Klein
- Legal name
- Klein
- Website
- https://klein-usa.com
- Company type
- Private
- Founded year
- 1931
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- KLEIN is a 1931-founded Spanish architectural hardware manufacturer producing proprietary sliding, folding, swing, and exterior enclosure door systems, sold directly to architects, designers, and professional installers globally through request-for-quote specifications and project sales.
- Ownership category
- akta.pro rank
Klein industry classification
Industry- Product category
- Architectural Door Hardware
- NAICS
- Metal Window and Door Manufacturing (332321)
- SIC
- Partitions, Shelvg, Lockers, & Office & Store Fixtures (2540)
- akta.pro primary industry
- Architectural Hardware & Door Controls (Hinges, Locks, Closers, Panic Devices) (IMADAIAI)
- akta.pro secondary industry
- Interior Doors (IMADAIAB)
Keywords
Where Klein is headquartered
LocationHeadquarters
- HQ city
- East Rutherford
- HQ country
- United States
- HQ region
- North America
Offices2 records
Markets served
Klein business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Operations, Personnel, Technology or R&D, Marketing or Sales
Revenue model
- Hardware systems sales: KLEIN generates revenue through the sale of interior partition hardware systems including sliding doors, folding doors, swing doors, and exterior enclosures. Products are sold as complete systems with mechanisms and tracks for professional installation.
Go-to-market motion1 record
Distribution channels1 record
Marketing channels3 records
Klein product offering
Product offeringCore offering
Klein designs and manufactures hardware systems for interior architectural space partitioning, including sliding door systems (NATURE, SK GLASS, EXTENDO), folding door hardware (LITE PAR & FOLD), swing door hardware, and exterior enclosures, along with kits, tracks, and closet door hardware. Products are sold as complete systems with mechanisms and tracks for professional installation, marketed to architects, designers, and installers through a request-for-quote model on the company website, supported by technical advice and a specs tool for downloading technical drawings.
Product overview
KLEIN is a hardware manufacturer specializing in interior architectural space partitioning systems. The company offers a unified portfolio of door hardware products comprising sliding door systems (NATURE System, SK GLASS Hardware, EXTENDO), folding door solutions (LITE PAR & FOLD), and swing door hardware, complemented by exterior enclosure options and component-level products including kits, tracks, and closet door hardware. Since 1931, KLEIN has focused on designing and manufacturing systems for sliding, folding, and hinged doors with emphasis on durability, functionality, and aesthetics. The product line supports various track configurations including exposed, concealed, corner, and telescopic options. KLEIN also provides professional services including technical advice and a specs tool for architects, as well as installer tools and resources.
Differentiator
Problem solved
Functional benefit
Products and services
- NATURE System Wooden sliding door system with concealed mechanisms designed to let wood material take center stage. Features easy installation and ultra-smooth gliding action for dividing interior architectural spaces with natural elegance. Sold to architects, designers, and installers for residential, hospitality, and commercial projects.
- SK GLASS Hardware Sliding glass door system with a profile without holes for walls and ceilings, featuring KBS closure option for optimal durability and performance. Marketed as 'Elegance and Durability within everyone's reach.' Sold to architects, designers, and installers for glass door partitioning projects.
- EXTENDO Telescopic sliding glass door hardware with synchronized movement that creates wide openings for interior space partitioning. Sold to architects, designers, and installers for projects requiring expansive opening solutions.
- LITE PAR & FOLD Klein's most discreet and compact hardware for 2, 3, 4, and 5-leaf folding doors, enabling flexible interior space organization with miniaturized form factor. Sold to architects, designers, and installers.
- Swing Doors Hardware Hardware systems for traditional swing door installations that complement Klein's sliding and folding door portfolio. Sold to architects, designers, and installers for residential, hospitality, and commercial interior door applications.
- Exterior Enclosures Hardware Hardware solutions for exterior enclosure applications that extend Klein's interior partitioning capabilities to outdoor spaces. Sold to architects, designers, and installers.
Companies that use Klein
Customer profileNamed customers4 records
Segments4 records
Ideal customer profiles5 records
Klein technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature4 records
Klein partnerships and signals
Strategic signalScale indicators2 records
Recent moves5 records
Expansion highlights5 records
Klein competitors and assessment
Company assessmentDirect peers
- GEZE: German manufacturer of door, window, and safety technology including sliding and folding door systems for commercial and residential projects. Comparable product offering and European heritage, with stronger commercial building automation portfolio.
- Sugatsune: Japanese specialty architectural hardware manufacturer with premium sliding, folding, and pocket door systems. Comparable niche focus on design-forward hardware for architects, with similar proprietary mechanism development approach.
- Häfele: German-headquartered architectural hardware manufacturer with a global footprint and a deep catalog of sliding, folding, and swing door hardware. Directly comparable product offering and similar B2B architect/installer go-to-market approach, but operating at significantly larger scale.
- Blum: Austrian family-owned manufacturer of furniture fittings and architectural hardware including sliding door systems. Comparable family-owned specialty hardware structure, European heritage, and emphasis on concealed mechanism innovation.
- Linnea: Specialty manufacturer of sliding door hardware and systems for residential and commercial applications. Directly comparable niche focus on sliding/folding door mechanisms with similar target market of architects and installers.
- Hettich: German family-owned hardware manufacturer specializing in furniture and architectural sliding/folding door systems. Comparable in product category, family-owned/privately-held structure, and European heritage, though with broader furniture hardware exposure.
Broad incumbents
- ASSA ABLOY: Swedish-listed global leader in door opening solutions with extensive architectural hardware portfolio. Relevant comparable as a broad incumbent covering sliding/folding door hardware among much larger locks, access, and entrance automation offerings.
- Allegion: US-listed major player in door hardware, locks, and access control with significant commercial specification presence. Relevant comparable as a North American incumbent that Klein must compete against for US architectural specifications.
- dormakaba: Swiss-listed global leader in door hardware, access control, and entrance systems. Overlaps Klein in sliding/swing door mechanisms but operates at far larger scale with full commercial access solutions, making it a broad incumbent rather than direct niche competitor.
Emerging players
- AD Systems: North American specialty provider of sliding and pocket door systems targeting commercial architectural specifications. Comparable niche in sliding door hardware with stronger North American specification presence but smaller scale than Klein.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks5 records
Key highlights5 records
Customer concentration
Klein social profiles
Digital presenceKlein financial estimates
Financial estimateRevenue estimate
Valuation estimate
Klein leadership team
Management profileNumber of profiles
Klein funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Klein M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Klein
What does Klein do?
Klein designs and manufactures hardware systems for interior architectural space partitioning, including sliding door systems (NATURE, SK GLASS, EXTENDO), folding door hardware (LITE PAR & FOLD), swing door hardware, and exterior enclosures, along with kits, tracks, and closet door hardware. Products are sold as complete systems with mechanisms and tracks for professional installation, marketed to architects, designers, and installers through a request-for-quote model on the company website, supported by technical advice and a specs tool for downloading technical drawings.
When was Klein founded?
Klein was founded in 1931. It employs 1 to 10 people.
Where is Klein based?
Klein is headquartered in East Rutherford, United States, in the North America region.
How does Klein make money?
One revenue line is on record: hardware systems sales.
Who are Klein's main competitors?
Direct peers on record are GEZE, Sugatsune, Häfele, Blum, Linnea and Hettich. Broad incumbents are ASSA ABLOY, Allegion and dormakaba. AD Systems is listed as an emerging player.
Does Klein have an API?
No public API is recorded for Klein.
What industry is Klein in?
Klein's product category is Architectural Door Hardware. Its primary akta.pro industry code is IMADAIAI, Architectural Hardware & Door Controls (Hinges, Locks, Closers, Panic Devices), with a secondary code of IMADAIAB, Interior Doors. Its NAICS code is 332321 and its SIC code is 2540.