Indow
Indow is a Portland-based manufacturer of custom window inserts that press into existing frames to block drafts, noise, UV, and light. Serving residential and commercial customers across the US and Canada, the company sells direct-to-consumer under IndowONE and to commercial buyers under IndowPRO, using patented compression-tubing technology.
- Company typePrivate
- Founded2010
- HeadquartersPortland, United States
- Headcount51–100
- GTM typeB2B and B2C
- OfferingHardware or Manufacturing
What Indow does
Indow, founded in 2010 and headquartered in Portland, Oregon, manufactures custom window inserts that press inside existing window frames to block drafts, reduce noise, lower energy bills, and address UV, light, and privacy issues without requiring window replacement. The company's flagship technology is a patented silicone compression tubing system (US Patent No. 9976335) that creates a near-airtight seal without modifying the existing frame, paired with proprietary Measure by Indow software and laser-measurement tools that have produced a 99.8% first-time fit rate across more than 100,000 inserts assessed. Indow operates two product brands: IndowONE for residential buyers (six acrylic grades covering thermal, acoustic, UV-blocking, sleep, privacy, and commercial uses, priced from $27-$40 per square foot) and IndowPRO for commercial projects, an engineered rigid aluminum frame system compatible with Vacuum Insulated Glass and acoustic laminated glass achieving STC 51 and air infiltration below 0.01 CFM. The company sells primarily direct-to-consumer through its website with a free-estimate and self-measure process, while maintaining a dedicated commercial sales team with a pilot-program motion that has delivered installations across hotels, offices, government buildings, and institutional facilities in North America. Indow is privately held, has reported more than $5.2M in disclosed funding across 2012-2016, and claims 23,000+ buildings insulated cumulatively, with founder Sam Pardue serving as CEO.
Indow firmographics
Firmographics- Name
- Indow
- Legal name
- Indow Windows
- Website
- https://indowwindows.com
- Company type
- Private
- Founded year
- 2010
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Short description
- Indow is a Portland-based manufacturer of custom window inserts that press into existing frames to block drafts, noise, UV, and light. Serving residential and commercial customers across the US and Canada, the company sells direct-to-consumer under IndowONE and to commercial buyers under IndowPRO, using patented compression-tubing technology.
- Ownership category
- akta.pro rank
Indow industry classification
Industry- Product category
- Window Insulation Products
- NAICS
- Blind and Shade Manufacturing (337920), Blind and Shade Manufacturing (33792)
- SIC
- Unsupported Plastics Film & Sheet (3081), Adhesives & Sealants (2891)
- akta.pro primary industry
- Window Treatments & Shading Systems (Blinds, Shades, Awnings) (IMADAIAN)
- akta.pro secondary industries
- Windows (IMADAIAC), Sealants (Construction & Industrial) (IMAEAGAI)
Keywords
Where Indow is headquartered
LocationHeadquarters
- HQ city
- Portland
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
Indow business model
Business model- GTM type
- B2B and B2C
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Operations, Personnel, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- Custom Window Insert Sales: One-time purchase of custom window inserts priced per square foot. Products are custom-made to exact window measurements using laser measurement technology. Pricing varies by acrylic grade (Thermal, Acoustic, UV Blocking, Sleep, Privacy, Commercial) with volume discounts starting at 3 inserts.
- Project-Based Installations: Complete project pricing including multiple inserts for full homes or commercial buildings. Current pricing: Small Project (1-2 Windows) $750, Average Project (5-6 Windows) $2,800, Full Home (12+ Windows) $6,500. Prices increasing 10% on July 1, 2026.
- Measurement Services: Professional measuring services using laser measurement kits or tape measure programs, included as part of the custom ordering process to ensure precise fit.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Unit Pricing | Pay-as-you-go | Small Project (1-2 Windows) |
| Unit Pricing | Pay-as-you-go | Average Project (5-6 Windows) |
| Unit Pricing | Pay-as-you-go | Full Home (12+ Windows) |
| Unit Pricing | Pay-as-you-go | Thermal Inserts (Standard Grade) |
| Unit Pricing | Pay-as-you-go | Acoustic Inserts (Acoustic Grade) |
| Unit Pricing | Pay-as-you-go | UV Blocking Inserts (Museum Grade) |
| Unit Pricing | Pay-as-you-go | Sleep Panels (Sleep Grade) |
| Unit Pricing | Pay-as-you-go | Privacy Inserts (Privacy Grade) |
| Unit Pricing | Pay-as-you-go | Commercial Inserts (Commercial Grade) |
Go-to-market motion2 records
Distribution channels4 records
Marketing channels9 records
Indow product offering
Product offeringCore offering
Indow designs, manufactures, and sells custom-made acrylic window inserts that press-fit inside existing window frames using patented silicone compression tubing to block drafts, reduce noise, and improve energy efficiency. Products are offered in multiple acrylic grades (Thermal, Acoustic, UV Blocking, Sleep, Privacy, Commercial) under the IndowONE residential line and a higher-performance IndowPRO commercial secondary glazing system, with customers measured either via laser measurement kits or proprietary Measure by Indow software before custom fabrication at the Portland, OR facility.
Product overview
Indow offers window insert products under two main brands: IndowONE for residential applications and IndowPRO for commercial projects. The IndowONE product line consists of six acrylic grade variants (Thermal/Standard Grade, Acoustic Grade, UV Blocking/Museum Grade, Sleep Grade, Privacy Grade, and Commercial Grade) that provide different levels of insulation, noise reduction (50-70%), UV protection (98%), light blocking (up to 100%), and energy savings (average 20%). All inserts use patented silicone compression tubing for a near-airtight seal and are custom-made to exact window measurements. IndowPRO is a separate engineered commercial system featuring rigid aluminum frames compatible with advanced glazings like Vacuum Insulated Glass and acoustic laminated glass, achieving STC ratings up to 50+ and U-values as low as 0.125.
Differentiator
Problem solved
Functional benefit
Brands
- IndowPRO: Commercial secondary glazing system engineered for large-scale commercial projects with high-performance thermal and acoustic specifications.
- IndowONE
Products and services
- IndowONE Window Inserts Custom-made interior window inserts that press into existing window frames using patented silicone compression tubing to block drafts, reduce noise, and improve energy efficiency, offered in multiple acrylic grades for residential customers across the United States and Canada.
- Thermal Window Inserts Standard-grade acrylic inserts that block cold drafts in winter, retain cool air in summer, deliver an average of about 20% energy savings, reduce noise up to 50%, and prevent condensation, intended for homeowners seeking a general-purpose thermal retrofit.
- Acoustic Window Inserts Acoustic-grade acrylic inserts that reduce noise by up to 70%, bring thermal benefits of about 20% energy savings, and are intended for homes and properties near high-traffic streets, rail lines, airports, or other loud environments.
- UV Blocking Window Inserts Museum-grade acrylic inserts that block up to 98% of harmful UV rays to protect furniture, art, and flooring from sun damage while also providing up to 50% noise reduction, marketed to homeowners, museums, and historic-property owners.
- Sleep Panels Sleep-grade inserts that block 100% of incoming light for total blackout, while also providing noise reduction and energy savings for residential customers with shift-work schedules, street-facing bedrooms, or other light-disruption issues.
- Privacy Inserts Privacy-grade acrylic inserts that obscure outside visibility into the home without blocking natural light, delivering up to 50% noise reduction and an average of about 20% energy savings for urban and street-facing residences.
- Commercial Inserts Commercial-grade scratch-resistant acrylic inserts designed for high-traffic commercial interiors such as offices, schools, and hospitality venues, capable of withstanding daily wear and commercial-grade cleaners while delivering IndowONE-level thermal and acoustic performance.
- IndowPRO Commercial Secondary Glazing System Engineered commercial secondary glazing system that delivers high-performance thermal and acoustic results — STC ratings of 50+ and U-values around 0.125 — using a patent-pending modular frame compatible with Vacuum Insulated Glass and acoustic laminated glass, sold to hotels, offices, healthcare facilities, schools, multifamily buildings, and government buildings for large-scale projects in North America.
Quantifiable outcome
- Average 20% energy savings on heating and cooling bills
- +10 more outcomes
Companies that use Indow
Customer profileNamed customers15 records
Segments8 records
Ideal customer profiles5 records
Indow technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature6 records
Indow partnerships and signals
Strategic signalPartnerships
Four partnerships are on record, tiered minor and core.
- Neil KellyminorHome performance experts who partnered with the Oregon Governor's Mansion for comprehensive energy upgrades including Indow window inserts, insulation, air sealing, and LED lighting.
- This Old HousecoreFeatured on This Old House TV show and partnered with them to help Scott and Kathleen block noise and cold drafts in their Charleston historic home in Ansonborough neighborhood.
- Portland State University Green Building Research LabminorUniversity research lab conducted studies on Indow inserts, finding results similar to U.S. Department of Energy study showing 20% energy savings.
- US Department of EnergyminorFederal agency whose research validated Indow inserts, finding 20% reduction in heating and cooling costs in a Seattle home study.
Scale indicators8 records
Recent moves7 records
Expansion highlights5 records
Indow competitors and assessment
Company assessmentBroad incumbents
- Hunter Douglas: Global leader in window coverings (blinds, shades, shutters) serving residential and commercial markets. Comparable to Indow as a window-treatment incumbent competing for the same light/privacy/insulation use cases, though Hunter Douglas focuses on mechanical/motorized coverings rather than insulating inserts.
- Marvin: Premium window and door manufacturer serving residential and commercial markets, with strong presence in historic and custom projects. Overlaps with Indow's historic-preservation segment and competes for the same high-end homeowner and architect relationships.
- Pella Corporation: Major US window and door manufacturer with a direct-to-consumer sales motion and installer network. Competes with Indow as a window-replacement alternative for homeowners prioritizing aesthetics, warranty, and full-unit replacement over insert retrofits.
- Vitro Architectural Glass: One of North America's largest architectural glass manufacturers, supplying coated and high-performance glass for commercial facades. Overlaps with IndowPRO in commercial energy and acoustic performance specifications and competes for the same building-owner specification process.
- Cardinal Glass Industries: Privately held US manufacturer of architectural and residential glass, including high-performance insulated glass units. Competes indirectly with IndowPRO by providing the advanced glazings (e.g., acoustic laminated, vacuum insulated) that IndowPRO integrates into commercial framing systems.
- Andersen Corporation: Largest US window and door manufacturer (Andersen, Renewal by Andersen). The principal full-replacement alternative to Indow in residential and light commercial; competes for the same homeowner retrofit budget that Indow targets with inserts.
- Lutron Electronics: Major manufacturer of motorized window shades, blinds, and integrated lighting/shading controls for residential and commercial buildings. Comparable to IndowPRO as a premium automated shading solution for hotels, offices, and high-end residences seeking energy and acoustic performance.
- 3M (Window Film): 3M Window Film offers sun-control, UV-blocking, and safety/security window films for residential and commercial buildings. Comparable to Indow's UV/Sleep/Privacy grades as a lower-cost retrofit alternative for homeowners and building owners seeking to block light, UV, and improve comfort.
Emerging players
- SageGlass (Saint-Gobain): Electrochromic smart glass subsidiary of Saint-Gobain that dynamically tints windows for daylight and energy control. Comparable to IndowPRO as an emerging alternative for commercial energy and comfort retrofits, targeting overlapping architectural and high-end residential customers.
- View, Inc. Developer of dynamic/smart glass that modulates tint electronically for energy and occupant comfort in commercial buildings. Competes with IndowPRO in commercial new construction and retrofit deals where daylight and HVAC performance are key specifications.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks7 records
Key highlights7 records
Customer concentration
Indow social profiles
Digital presenceIndow financial estimates
Financial estimateRevenue estimate
Valuation estimate
Indow leadership team
Management profileNumber of profiles
Profiles1 record
Indow funding detail
Funding detailFunding overview
Funding rounds4 records
Investors14 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Indow 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 Indow
What does Indow do?
Indow designs, manufactures, and sells custom-made acrylic window inserts that press-fit inside existing window frames using patented silicone compression tubing to block drafts, reduce noise, and improve energy efficiency. Products are offered in multiple acrylic grades (Thermal, Acoustic, UV Blocking, Sleep, Privacy, Commercial) under the IndowONE residential line and a higher-performance IndowPRO commercial secondary glazing system, with customers measured either via laser measurement kits or proprietary Measure by Indow software before custom fabrication at the Portland, OR facility.
Is Indow a public or private company?
Indow is a private company. It is classified as venture growth investor backed and is currently operating.
When was Indow founded?
Indow was founded in 2010. It employs 51 to 100 people.
Where is Indow based?
Indow is headquartered in Portland, United States, in the North America region.
How does Indow make money?
Three revenue lines are on record. Custom Window Insert Sales are the primary driver. The others are project-Based Installations and measurement Services.
Who are Indow's main competitors?
Broad incumbents on record are Hunter Douglas, Marvin, Pella Corporation, Vitro Architectural Glass, Cardinal Glass Industries, Andersen Corporation, Lutron Electronics and 3M (Window Film). Emerging players are SageGlass (Saint-Gobain) and View, Inc..
Does Indow have an API?
No public API is recorded for Indow.
What industry is Indow in?
Indow's product category is Window Insulation Products. Its primary akta.pro industry code is IMADAIAN, Window Treatments & Shading Systems (Blinds, Shades, Awnings), with a secondary code of IMADAIAC, Windows. Its NAICS code is 337920 and its SIC code is 3081.