SOSS Door Hardware

What SOSS Door Hardware does

SOSS Door Hardware, founded in 1903 by Joe Soss in Pioneer, Ohio, is the original inventor and a category-defining manufacturer of invisible (concealed) door hinges. The company designs and produces a portfolio of 59 invisible hinge SKUs across multiple series — light-duty (100/101/103), medium-duty (204/208/212), heavy-duty (216/416 and 218/418), and specialty configurations including barrel, quadrant, wrap-around (518), and power-transfer variants — plus six installation accessories. Underlying technology centers on concealed linkage geometry that hides the hinge entirely when the door is closed, with material options spanning zinc, alloy steel, and 316 stainless steel, and finishes including brass, chrome, nickel, and 24K gold. Differentiated product capabilities include UL-certified fire ratings (20, 90, and 180 minutes), power-transfer hinges carrying up to 2.5 amps at 24 VDC for electrified access-control doors without exposed wiring, and an invisible closer mechanism for self-closing concealed doors.

SOSS generates revenue through B2B and B2C hardware sales, priced per unit with quote-based ordering through its authorized global dealer/distributor network and direct e-commerce storefront on soss.com. The go-to-market is hybrid: channel-partner distribution supplemented by specification-driven enterprise selling targeting architects, interior designers, cabinet makers, hospitality groups, and medical equipment OEMs. Marketing reach is built on a long-form content blog, YouTube installation tutorials, an interactive hinge selection calculator, AEC Daily continuing-education programming for architects, and active social media presence. In October 2024, SOSS was acquired by Allegion plc (NYSE: ALLE), a publicly traded access and security solutions company, and now operates as a wholly-owned subsidiary within Allegion's high-end door hardware portfolio.

The company serves a diversified customer base across residential (homeowners, custom cabinetry), commercial/hospitality (boutique hotels, architectural millwork), institutional (medical equipment), and specification-driven design professionals. Pricing is not publicly disclosed and operates on a per-unit basis with variation by series, material, and finish. SOSS holds UL Certification GWZQ.R13634 for its fire-rated hinge line, providing a compliance barrier in commercial fire-door applications, and continues to invest in product extensions that bridge mechanical concealed hardware with electrified access-control infrastructure.

Name

SOSS Door Hardware

Legal name

SOSS Door Hardware

Website

https://soss.com

Company type

Private

Founded year

1903

Operating status

Operating

Headcount range

11–50 employees

Short description

SOSS Door Hardware, founded in 1903 and based in Pioneer, Ohio, designs and manufactures invisible (concealed) door hinges, fire-rated hinges, and power-transfer hinges, serving architects, cabinet makers, hospitality designers, and homeowners through a global authorized dealer network and direct e-commerce; the company is a wholly-owned subsidiary of Allegion plc since October 2024.

Ownership category

akta.pro rank

Product category

Concealed Door Hardware

NAICS

Bolt, Nut, Screw, Rivet, and Washer Manufacturing (332722)

SIC

Cutlery, Handtools & General Hardware (3420)

akta.pro primary industry

Architectural Hardware & Door Controls (Hinges, Locks, Closers, Panic Devices) (IMADAIAI)

Keywords

• Invisible hinges
• Concealed door hardware
• Fire-rated hinges
• Power transfer hinges
• Architectural door hardware

Headquarters

HQ city

Pioneer

HQ country

United States

HQ region

North America

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Hardware Product Sales: SOSS generates revenue through the sale of invisible hinges, door hardware, and accessories. Products are sold through a distributor/dealer network and direct e-commerce. Pricing is quote-based for most products.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels6 records

Core offering

SOSS Door Hardware designs, manufactures, and supplies invisible (concealed) hinges and accessories for doors and cabinets. The product line spans over a dozen hinge series (100/101/103, 204, 208, 212, 216/416, 218/418, 220/420, 518) plus barrel, quadrant, invisible closer, and power transfer variants for residential, commercial, fire-rated, and electrified access control applications. Products are available in zinc, alloy steel, and 316 stainless steel with multiple finishes and supported by installation accessories such as router guide systems and templates.

Product overview

SOSS Door Hardware is a manufacturer of concealed/invisible hinges, founded in 1903, that pioneered the original invisible hinge technology. The product portfolio centers on the SOSS Invisible Hinge brand—a comprehensive line of concealed door hardware across multiple series (100/101/103, 204, 208, 212, 216/416, 218/418, 220/420, 518) designed for applications ranging from light-duty cabinets to heavy-duty full-size entry and commercial doors. Key differentiators include fire-rated options (20, 90/180, and 180-minute ratings), power transfer capabilities for electrified doors, invisible closer mechanisms, and Hercules heavy-duty variants. The 518 Wrap-Around series is unique for allowing hinges around trim and molding. Materials include zinc alloy, alloy steel, and 316 stainless steel across various finishes. Accessories include router guide systems, templates, and door reinforcements. The company was acquired by Allegion plc in October 2024.

Differentiator

Problem solved

Functional benefit

Products and services

• 103 Series Invisible Hinge Light-duty invisible hinge for 3/4" to 1" thick material, available in zinc and steel or 316 stainless steel with nylon hinge links for increased strength.
• 204 Series Invisible Hinge Invisible hinge for 3/4" to 1" thick material, available in zinc and steel or grade 316 stainless steel with nylon hinge links. Suitable for cabinet doors, hidden floor doors, tables, desks, millwork, and windows.
• 208 Series Invisible Hinge Invisible hinge for 1" to 1-1/8" thick material, available in zinc and steel or grade 316 stainless steel with nylon links. Ideal for bifold doors, closets, and large cabinet doors.
• 212 Series Invisible Hinge Invisible hinge available with optional invisible closer feature and spring closer functionality. Fire rating options available.
• 216/416 Series Invisible Hinge Heavy-duty invisible hinge for 1-3/8" to 1-3/4" thick material. Model 216 offers 20-minute fire rating; Model 416 offers 90/180-minute fire rating. Available with invisible closer and Hercules option for large/heavy doors. Materials include zinc, alloy steel, or 316 stainless steel.
• 218/418 Series Invisible Hinge Heavy-duty invisible hinge for 1-3/4" to 2" thick material. Model 218 is 20-minute fire rated; Model 418 is 90/180-minute fire rated. Features power transfer capability (2.5 amps at 24 VDC), invisible closer options, and Hercules hinges for large doors. Available in zinc, alloy steel, and 316 stainless steel.
• 518 Series Wrap-Around Invisible Hinge Unique wrap-around invisible hinge that wraps around applied molding and trim, opening to 92 degrees. Requires minimum 1-3/4" material thickness. Solid alloy steel links. Allows hidden doors with no reveal lines.
• Barrel Hinge Invisible barrel hinge for doors and cabinets, designed for craft and wood applications.
• Invisible Closer Hinge Invisible hinges with built-in automatic closing mechanism. Available for door thicknesses of 1-1/8" to over 2". Ideal for hidden door applications to keep doors closed without latches. Available in 20-minute and 90/180-minute fire-rated options.
• Light Duty SOSS Invisible Hinges (100/101/203 Series) Light-duty invisible hinges including Model 100 (for trinket boxes, humidors), Model 101 (lightest duty load bearing), and Model 203 (for 3/4" to 1" thick material). Available in various finishes and 316 stainless steel.
• Quadrant Hinge Specialized invisible quadrant hinge for doors and cabinets in craft and wood applications.
• SOSS Invisible Hinge (220/420 Series) Full-size entry invisible hinges available in various materials including zinc, alloy steel, and stainless steel. Options include fire ratings (20 min, 90/180 min, 180 min), power transfer, and concealed surface mount variants.
• SOSS Power Transfer Hinge Specialized hinges that transfer power from door frame to door without visible wires. Supports electrified devices with 4 or 6 wires up to 2.5 amps at 24 VDC. Models include 218PT1/220PT1 (1 amp, 20 min fire rating) and 218PT/220PT (2.5 amp).
• SOSS Accessories (Router Guide System, Router Bits, Templates, Steel Reinforcements, Magnetic Door Holder) Installation and accessory products including the Invisible Hinge Router Guide System, Amana Tool Router Bit, Router Guide Template, Porter-Cable Guide Bushing and Locknut, Steel Door Reinforcements, and Magnetic Door Holder and Stop.

Quantifiable outcome

• 120+ years of invisible hinge innovation and manufacturing
• +2 more outcomes

Named customers4 records

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Scale indicators4 records

Recent moves6 records

Expansion highlights6 records

Market position

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/SOSSDoors
• YouTubeyoutube.com/channel/UCppsrHDDjYODhsK2pZ6Tp6A
• Facebookfacebook.com/pages/SOSS-Door-Hardware/254546971278920
• LinkedInlinkedin.com/company/soss-door-hardware
• Instagraminstagram.com/sossdoorhardware

Compliance1 record

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 SOSS Door Hardware