Cityproof

What Cityproof does

Cityproof operates a sales-led, field-consultative go-to-market model. Free site visit estimates lead to custom quotes that vary by window style, size, glass thickness (standard laminated up to 1/2-inch Starphire), frame finish, and quantity; per-window pricing starts at approximately $500 and reaches up to approximately $4,000. Revenue is recognized on a one-time, project basis for both residential installations (single apartment windows to full-home) and commercial installations (office suites, hotels, hospitals, financial institutions). All installation is performed by in-house Cityproof employees averaging over 15 years of experience, rather than subcontractors. The customer base spans residential homeowners and renters (primary), corporate and commercial buyers (law firms, financial institutions, healthcare, hospitality), architects and design professionals who specify the product, and creative studios. Service geography covers Manhattan, Brooklyn, Queens, the Bronx, Long Island, and the broader NYC Tri-State area, including parts of New Jersey. Demand generation combines an SEO- and content-driven website (blog, glossary, FAQ, video demos, YouTube channel), earned media coverage in The New York Times, New York Magazine, and Brick Underground, third-party review platforms, and a longstanding referral network of architects, acoustical consultants, construction managers, building managers, and interior designers. The company holds the Citiwindows® registered trademark and has a minor technical partnership with Saflex for acoustical-grade laminated glass.

Name

Cityproof

Legal name

Cityproof Corp.

Website

https://cityproof.com

Company type

Private

Founded year

1960

Operating status

Operating

Headcount range

11–50 employees

Short description

Cityproof manufactures and installs custom interior soundproof window systems (Citiwindows®) for residential and commercial customers in the New York City metropolitan area, operating since 1960 with in-house installation crews and a 95% noise reduction claim.

Ownership category

akta.pro rank

Product category

Soundproof Window Systems

NAICS

Drywall and Insulation Contractors (238310), Metal Window and Door Manufacturing (332321)

SIC

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

akta.pro industry

PRIMARYIMAFANAL

Acoustic & Soundproofing Works

Industrials, Manufacturing & Construction/Construction & Civil Engineering/Interior Fit-Out & Finishing Contractors

SECONDARYHSAPAFAH

Soundproofing & Acoustic Insulation (Walls/Ceilings)

Home & Personal Services/Residential Renovation Services/Interior Remodeling (Walls, Ceilings, Trim & Layout Changes)

SECONDARYIMADANAL

Noise & Vibration Control for HVAC (Silencers/Isolation)

Industrials, Manufacturing & Construction/Building Materials & Products/HVAC Components & Building Ventilation Products

SECONDARYIMAIABAG

Building Envelope & Weatherproofing (Roofing/Waterproofing/Gutters)

Industrials, Manufacturing & Construction/Industrial Services & Facility Operations/Building Maintenance & Repair (MEP/HVAC/Plumbing/Electrical)

Keywords

• Soundproof windows
• Interior window inserts
• Acoustic glazing
• Noise reduction windows
• Custom window installation

Headquarters

HQ city

Long Island City

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Custom Soundproof Window Sales: One-time sale of custom soundproof interior windows. Pricing is project-based, varying by window style, size, glass thickness, and quantity. Each window is custom-manufactured to exact measurements. Revenue recognized per installation project. Residential projects range from single apartment windows to full-home installations; commercial projects range from office suites to hundreds of windows in hospitals or financial institutions.
2. Soundproof A/C Enclosure Sales: Custom-built enclosures for window and wall-mounted air conditioning units. Reduces noise penetration by up to 95% and eliminates infiltration of dirt, drafts, and cold through AC units.
3. Professional Installation Services: Installation services provided by in-house Cityproof employees with over 15 years average experience. Installation is clean, quick, and non-intrusive with no structural changes required. Free site visit estimates with no obligation.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels7 records

Core offering

Cityproof designs, manufactures, and installs custom interior soundproof window systems (the Citiwindows® brand) that fit on the inside of existing exterior windows, creating a sealed buffer zone of still air that reduces noise infiltration by up to 95%. The company also builds custom Soundproof A/C Enclosures for window- and wall-mounted air conditioning units that reduce A/C noise by up to 95%. Products are custom-manufactured to exact on-site measurements in Long Island City, NY, and installed by in-house Cityproof employees.

Product overview

Cityproof is a custom manufacturer and installer of interior soundproof window systems, operating since 1960 in New York City and Long Island. The core product is the Citiwindows® brand—custom-fitted interior window inserts that install on the inside of existing exterior windows without modification. The product line centers on the Citiwindows® system, complemented by Soundproof A/C Enclosures for window-mounted air conditioners. Services include Commercial Services for businesses and Architect Services for design professionals. All products share a common technology platform: laminated glass with PVB interlayer, airtight sealing, and a buffer zone of still air that achieves up to 95% noise reduction and up to 30% energy savings.

Differentiator

Problem solved

Functional benefit

Brands

• Citiwindows®: Custom interior soundproof window system that reduces noise by up to 95%, eliminates drafts and dirt infiltration, and provides thermal control and UV protection. The Citiwindows® are installed inside existing exterior windows to create a buffer zone of air space.

Products and services

• Citiwindows® Soundproof Interior Windows Custom-manufactured interior soundproof window inserts installed on the inside of existing exterior windows without structural modification. Built to exact on-site measurements using laminated glass with PVB interlayer and a proprietary concealed stainless-steel perimeter tracking system. Available in horizontally sliding, vertically sliding, hinged, stationary/lift-out, and combination styles. Reduces exterior noise by up to 95%, eliminates 99% of drafts, dust, and dirt, blocks 99% of UV rays, and delivers up to 30% energy savings. Designed for NYC and Long Island residential and commercial buildings, including landmarked properties where exterior window replacement is prohibited.
• Soundproof A/C Enclosures

Quantifiable outcome

• Reduces noise infiltration by up to 95%
• +4 more outcomes

Named customers8 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Scale indicators8 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• CitiQuiet: CitiQuiet designs and installs custom interior soundproof window inserts in the New York metro market, directly competing with Cityproof on the same problem of urban noise intrusion. The two share customer profile, geography, and product approach.
• Allied Window: Allied Window produces decorative and soundproof interior window systems, including operable and fixed inserts, frequently specified for historic and landmark buildings. It overlaps directly with Cityproof in providing custom interior soundproofing solutions for preservation-sensitive properties.
• Indow Windows: Indow Windows manufactures and sells custom interior window inserts designed to reduce noise, drafts, and heat loss by compressing a proprietary acrylic sheet into a window frame. Like Cityproof, it serves residential and commercial customers seeking non-invasive interior retrofits rather than full window replacement.
• Soundproof Windows Inc. Soundproof Windows Inc. manufactures and installs laminated-glass interior soundproof window systems marketed primarily to residential customers dealing with urban and airport noise. Its product architecture and target use cases are closely aligned with Cityproof's Citiwindows line.

Broad incumbents

• Andersen Windows & Doors: Andersen is one of the largest U.S. manufacturers of windows and doors, including high-performance sound-rated product lines. It represents a broad alternative for customers willing to undertake full window replacement rather than an interior insert approach.
• Pella Corporation: Pella is a large national window and door manufacturer offering premium replacement windows with soundproofing options. It competes with Cityproof indirectly as a substitute solution, particularly in non-landmark residential replacement projects.
• Marvin Windows and Doors: Marvin produces custom windows and doors, including high-end acoustic and historic-replication product lines. It overlaps with Cityproof's premium positioning and custom-fit ethos but delivers full window replacement rather than interior inserts.

Emerging players

• Acoustiblok: Acoustiblok manufactures soundproofing membranes and isolation materials used in walls, ceilings, and building envelopes. It is a partial competitor and adjacent supplier in the broader noise-control category where Cityproof operates.
• Serious Energy (QuietRock): Serious Energy's QuietRock brand produces sound-dampening drywall panels used in interior construction for noise control. It addresses the same underlying acoustic problem as Cityproof's window inserts but through wall assemblies rather than window retrofits.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• YouTubeyoutube.com/@cityproof1029

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 Cityproof