You receive a quote for elevator maintenance that seems too high. You call another company for a competitive bid. They decline to quote. "We cannot service that equipment," they explain. "It is proprietary."
This is the moment when most property managers first learn that the elevator industry operates by different rules than other building systems. Your HVAC contractor does not refuse to work on your Trane unit because a Carrier technician installed it. Your plumber does not need a special encrypted tool to diagnose your pipes.
But in the elevator world, proprietary lock-in is real, common, and expensive. Understanding how it works is the first step to avoiding it or escaping it.
Why Can Only One Company Service My Elevator?
When an elevator manufacturer controls the diagnostic tools, software, parts supply, or communication protocols, they control who can service the equipment. This is not about technical complexity. It is about deliberate business design.
The proprietary strategy emerged in the 1990s and 2000s as OEMs faced increasing competition from independent service providers. ISPs were winning contracts by offering lower prices and equivalent service quality on older equipment. The OEM response was to make new equipment harder to service without manufacturer involvement.
Today, the four major OEMs (Otis, KONE, Schindler, and TK Elevator) all manufacture equipment with varying degrees of proprietary control. Some systems are completely locked down. Others are partially open. The distinction matters enormously for your long-term costs.
This guide will help you understand what proprietary actually means, when it creates real problems, and what you can negotiate before signing your next contract.
Proprietary vs Non-Proprietary: A Clear Definition
The elevator industry does not have a single standard definition of "proprietary," which is part of the problem. However, the practical distinction comes down to three questions:
Can any licensed elevator mechanic diagnose problems? On non-proprietary equipment, a mechanic uses standard diagnostic tools and procedures. On proprietary equipment, diagnosis requires manufacturer-specific software, encrypted access codes, or special hardware that only the OEM or their authorized dealers possess.
Can replacement parts be sourced from multiple suppliers? Non-proprietary systems use standard components available from various independent controller manufacturers. Proprietary systems use parts that are only available from the manufacturer, sometimes with artificial supply restrictions or inflated pricing.
Can the controller communicate using open protocols? This is the core of modern lock-in. An open-protocol controller (like those from GAL or SmartRise) can be integrated, maintained, and upgraded by any competent technician. A closed-protocol controller encrypts communication, ties software licenses to service contracts, and may actively resist third-party access. Note that "non-proprietary" does not mean "problem-free." Even independent controllers carry equipment-specific risks. SmartRise, for example, has documented safety concerns that require verification regardless of service provider.
The Spectrum of Proprietary Control
Proprietary is not binary. Most equipment falls somewhere on a spectrum:
Fully Non-Proprietary: Older hydraulic units (pre-1990), traction elevators with relay-logic controls, and modern equipment specifically designed with open protocols. Any licensed mechanic can service these with standard tools.
Partially Proprietary: Many mid-range systems. The controller may be proprietary, but the mechanical components (doors, machine, governor, rails) are standard. Switching service providers requires controller replacement but not a full modernization.
Highly Proprietary: Premium destination dispatch systems, integrated access control systems, and some recent high-rise installations. The entire system architecture assumes OEM involvement. Switching is possible but expensive.
Common Proprietary Systems by Manufacturer
- Otis: Compass destination dispatch system, Gen2 machine-room-less traction
- KONE: KONE Access integrated access control, destination dispatch
- Schindler: PORT destination dispatch technology
- TK Elevator: TWIN (multiple cabs in single shaft), Destination Selection Control
If your building has any of these systems, understand the lock-in implications before your current contract expires. For buildings considering modernization, independent elevator companies can often install open-protocol alternatives that preserve your future options.
How Proprietary Systems Lock You In
The mechanics of lock-in are straightforward. Once you understand them, you can identify red flags in proposals and contracts.
Controller Encryption. The controller is the elevator's brain. When it is encrypted, only someone with the decryption key can read error codes, adjust parameters, or diagnose problems. The manufacturer holds the key. Your service options narrow to one.
Proprietary Communication Protocols. The controller talks to door operators, safety devices, and destination dispatch screens using a specific language. If that language is proprietary, replacement components must speak it too. Generic aftermarket parts will not work.
Parts Supply Control. Even when non-proprietary parts exist, some OEM contracts require using OEM-supplied parts exclusively. Violating this clause may void your service warranty. The practical effect is hidden fees in your maintenance contract that appear only when something breaks. When the OEM declares equipment "obsolete," contract exclusions kick in and force modernization. Our guide on the obsolescence trap explains how OEMs manufacture scarcity to drive six-figure upgrade sales.
Software Licensing. Modern elevator controllers run software. That software may require an active license to function. The license is tied to the service contract. Cancel the service, lose the license, and the elevator stops working properly.
Certified-Only Repair Requirements. Some contracts specify that only "manufacturer-certified" technicians can perform certain repairs. This sounds reasonable until you learn that certification requires employment by the manufacturer or an authorized dealer.
The Cost Impact
Industry estimates suggest proprietary service premiums range from 20% to 50% above competitive market rates for equivalent equipment. The premium compounds over a 20-year equipment lifecycle. And the common sales pitch that "showing a competitive quote will get the OEM to match" often fails precisely because they know you cannot actually switch. See our full analysis of elevator industry myths debunked for more on this dynamic.
For a building with two elevators paying $1,500 monthly in maintenance, a 30% proprietary premium represents $10,800 per year, $108,000 over 10 years, and $216,000 over 20 years. These are real dollars that could fund capital improvements instead of manufacturer margin.
When Proprietary Makes Sense (And When It Doesn't)
Proprietary equipment is not always a mistake. In certain situations, the technology justifies the trade-off.
High-Traffic Destination Dispatch. For buildings with significant vertical traffic (large commercial office towers, hospitals, hotels with 15+ floors), destination dispatch systems meaningfully improve wait times and energy efficiency. The proprietary premium may be worth it if traffic analysis supports the investment.
New Construction Under Warranty. OEM equipment in a new building carries a manufacturer warranty. During the warranty period, OEM service is expected and appropriate. The question is what happens after.
Integrated Security Systems. If your building requires tight integration between elevator access and building security (think: data centers, government facilities, secure medical research), proprietary systems may offer capabilities that open-protocol alternatives cannot match.
When Proprietary Does Not Make Sense:
Mid-Rise Commercial and Residential. A 10-story office building or apartment complex with standard traffic patterns does not need destination dispatch. A reliable traction or hydraulic elevator with open-protocol controls will serve the building for decades with competitive service options.
After Warranty Expiration. Once the warranty period ends, you own the equipment. The argument for OEM service weakens considerably when they are no longer backing their product.
Existing Buildings with Aging Equipment. If you are modernizing anyway, you control the specification. There is no reason to accept proprietary lock-in when open-protocol alternatives exist at comparable or lower prices.
Use the elevator company comparison guide to evaluate whether your specific building needs premium features that justify proprietary trade-offs.
Negotiating Before the Lock-In
The time to address proprietary concerns is before you sign the modernization proposal or service contract. Once the equipment is installed, your leverage disappears.
Questions to Ask Every Bidder
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What diagnostic tools does your equipment require? Standard tools vs. proprietary software.
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Where can replacement parts be sourced? Multiple suppliers vs. manufacturer-only.
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What protocol does the controller use? Open (GAL, SmartRise) vs. proprietary.
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If we terminate service, can another contractor service this equipment? Get this in writing.
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Are software licenses tied to service contracts? If yes, what happens when the contract ends?
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Will you provide diagnostic access codes to building management? Some owners request this as a contract term.
Clauses to Require
Insert these requirements into your RFP and negotiate them into the final contract:
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Open-Protocol Controller: Specify GAL, SmartRise, or equivalent in the modernization scope. Reject proprietary alternatives unless the premium feature is essential.
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Parts Availability Guarantee: The contractor must provide parts or equivalent-quality alternatives for at least 15 years after installation.
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Tool Access: Building management receives any diagnostic tools or codes necessary for basic troubleshooting.
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No Licensing Lock-In: Software continues to function regardless of service contract status.
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Transferable Service Rights: If you change service providers, the new contractor can access all systems necessary for maintenance.
Before signing any proposal, run it through our Contract Scanner to identify proprietary lock-in clauses that may be buried in the fine print. The contract negotiation guide provides additional tactics for these conversations.
Breaking Free From an Existing Proprietary Contract
If you already have proprietary equipment and are unhappy with your service options, escaping the lock-in is possible but requires planning.
Assess Your Current Lock-In Level
The first question is: where exactly is the proprietary control? If only the controller is locked down but mechanical components are standard, a controller replacement during your next modernization solves the problem. If the entire system is proprietary, full modernization or replacement may be required.
Review your current contract for terms that restrict your options. Some contracts prohibit third-party service even after termination. Others allow switching but void warranties. Understanding the contractual landscape is step one. If you are planning to exit your current contract, factor controller replacement costs into your transition budget.
The Modernization Escape Path
Most proprietary lock-in is solved through modernization vs replacement decisions. When you modernize the controller, specify open-protocol. This converts a proprietary system into a competitive one.
Controller-only modernization typically costs $15,000-$40,000 per elevator depending on complexity. Compare this to the proprietary premium over 10-20 years. For many buildings, the math favors early modernization.
Transition Considerations
Switching service providers on partially proprietary equipment requires coordination:
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Notify Current Provider: Most contracts require 60-90 days notice. Check your termination clause.
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Document Everything: Obtain all maintenance records, adjustment data, and equipment specifications before the transition.
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Coordinate Timing: Schedule controller replacement or service transition during low-traffic periods.
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Verify New Provider Capabilities: Ensure your new contractor has demonstrated experience with your equipment type.
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Retain Access Codes: If your current provider has any building-specific codes or passwords, demand them in writing before termination.
The proprietary question is fundamentally about control. Who controls your service options, your parts supply, your upgrade path, and your costs?
For most buildings, open-protocol equipment provides equivalent functionality without the long-term lock-in premium. For the minority of buildings that genuinely need proprietary features, the premium may be acceptable if the trade-offs are understood upfront.
The mistake is accepting lock-in by default because you did not ask the right questions before signing. Now you know what to ask.
ElevatorBlueprint provides independent educational content for property managers and building owners. This is not legal advice or a guarantee of specific outcomes.