What Is OpenXR? A Plain-English Guide for Enterprise Teams

If your organization is evaluating or deploying XR technology, you have almost certainly encountered the term OpenXR. OpenXR is a royalty-free, open API standard that defines how XR applications communicate with XR hardware. Understanding it gives enterprise buyers a sharper framework for evaluating platforms, assessing vendor claims, and making infrastructure decisions that hold up as the market evolves.

By the end of this article, you will understand what OpenXR is and where it sits in the XR technology stack, how its governance model affects your organization's long-term vendor posture, what OpenXR conformance means when assessing XR vendors, and how the standard underpins enterprise XR streaming infrastructure.

In this guide:

• What the fragmentation problem was that OpenXR was built to solve

• How OpenXR’s layered architecture works, explained without requiring a technical background
• Who governs OpenXR and why that governance structure is a signal enterprise buyers should use
• What OpenXR conformance means when evaluating an XR platform vendor
• How OpenXR connects to enterprise XR streaming strategy and data sovereignty requirements

OpenXR at a Glance

The Fragmentation Problem That Made OpenXR Necessary

Before the OpenXR standard existed, every major XR platform maintained its own proprietary development interface. Targeting Microsoft’s HoloLens required the Windows Mixed Reality toolkit. Targeting Meta’s Quest devices required VrApi, a Meta-proprietary interface that Meta has since deprecated, ending active support on August 31, 2022, and directing all new development to OpenXR instead.^¹ Targeting Valve’s SteamVR ecosystem required the OpenVR SDK, governed solely by Valve and tied to the SteamVR runtime. These were not minor variations on a shared approach; they were architecturally different APIs, and an application written for one could not run on the others without significant redevelopment.

For enterprise organizations deploying XR at scale, this was a strategic liability. Mixed headset fleets meant maintaining parallel software investments for each vendor’s platform. Any hardware refresh cycle, or any decision to adopt a new device category, risked forcing a redevelopment project. An organization’s XR software portfolio was not portable; it was bound to whichever vendor’s SDK it had been written against.

The Khronos Group, the consortium responsible for established open graphics and media standards including OpenGL and Vulkan, announced the OpenXR Working Group at GDC on February 27, 2017, bringing together the major players in the XR industry to define a single, vendor-neutral API that any XR application could use and any XR hardware vendor could implement.^² OpenXR 1.0 was released publicly at SIGGRAPH in July 2019.^²

^{Before OpenXR vs. with OpenXR:}

What OpenXR Is and What It Is Not

OpenXR is a royalty-free, open API standard developed and maintained by the Khronos Group.^³ It defines a common set of interfaces through which an XR application communicates with XR hardware, without the application needing to know anything specific about the hardware it is running on. In practical terms, OpenXR is a precisely specified contract: the application issues standardized requests, and any runtime that correctly implements OpenXR knows exactly how to fulfill them, regardless of which headset is connected.

For readers who are not from a development background, it is worth being explicit about what OpenXR is not. OpenXR is not a game engine: it does not render graphics or run application logic. It is not a headset: it produces no output on its own. It is not a finished piece of software: it is a specification, a document that defines the behavior required of any compliant implementation. The component that actually implements OpenXR and communicates with the hardware is the runtime, covered in the architecture section below.

OpenXR’s Layered Architecture

OpenXR is designed as a layered system with three primary components sitting between the application and the physical hardware.

The loader is the first component the application interacts with. Its job is to discover which OpenXR runtime is active on the system and route the application’s calls to it, handling this automatically so the application requires no hardware-specific knowledge.

Between the loader and the runtime, API layers may optionally be inserted. These are middleware components used during development for validation, debugging, or performance analysis; in production deployments they are typically absent.

The runtime is the component that translates the application's standardized OpenXR calls into hardware-specific instructions for the connected device. Headset vendors and XR platform providers each ship their own runtime; the application only needs to know OpenXR. This separation is the core architectural value of the standard: the application speaks one language, and the runtime handles everything hardware-specific below it.

Extensions: Standardization Without Constraint

The core OpenXR specification covers the capabilities every XR system must support: session management, frame submission, input handling, and spatial tracking. Hardware capabilities beyond this baseline, such as eye tracking or mixed reality passthrough on specific headsets, are exposed through optional vendor extensions that applications query for availability before use, ensuring they function correctly on hardware that does not support a given feature.^⁴

Who Controls OpenXR and Why Governance Is an Enterprise Procurement Signal

The Khronos Group is a non-profit, open-membership industry consortium that manages the development of open standards for graphics, media, and spatial computing.^³ Its governance model is multi-stakeholder: changes to any Khronos standard require working group consensus, and no single member organization holds unilateral authority over the API. The organizations currently participating in the OpenXR Working Group include Meta, Microsoft, Google, NVIDIA, Qualcomm, Valve, HTC, PICO, and Varjo, among more than thirty others.

For enterprise buyers, this governance structure carries practical consequences. When an application is built against a proprietary SDK controlled by a single vendor, the long-term stability of that application is tied to that vendor’s business decisions. Meta’s deprecation of VrApi in 2022, withdrawing it from active support and directing all developers to OpenXR, is a documented instance of exactly this risk.^¹ Organizations that had already built against OpenXR were unaffected.

A standard governed through documented, multi-stakeholder consensus is structurally more durable for long-horizon planning. No participant in the OpenXR Working Group can unilaterally break backwards compatibility or withdraw the API, and for infrastructure decisions that span multiple hardware generations, that guarantee is a material consideration for enterprise buyers.

Hololight joined the Khronos Group and the OpenXR Working Group in March 2025, contributing specifically to advancing XR streaming capabilities within the standard.^⁵ That membership is both a technical commitment and a signal for enterprise buyers evaluating long-term XR streaming infrastructure.

OpenXR is not a technical checkbox. It is the architecture that determines whether an enterprise XR deployment can actually scale across devices, across teams, and across hardware generations. Our decision to join the Khronos Working Group was a strategic one: we are building infrastructure, and infrastructure requires standards with genuine industry consensus behind them.
- Florian Haspinger, Co-founder and Managing Director, Hololight

Open Standard vs. Single-Vendor API:
Enterprise Procurement Comparison

OpenXR Conformance: What It Means When Evaluating XR Vendors

As the OpenXR ecosystem matures, formal conformance has become an increasingly relevant signal for enterprise procurement decisions. OpenXR conformance is not a prerequisite for building products that work with OpenXR; it is a formal verification step that confirms a runtime correctly implements the specification across a comprehensive and independently administered set of functional tests.

That verification process is run by the Khronos Group through the open-source OpenXR Conformance Test Suite (CTS), a battery of tests published on GitHub that covers the full range of behaviors an OpenXR runtime must correctly handle.^⁶ A product that passes the CTS and completes the Adopter process earns the OpenXR trademark and receives patent protection under the Khronos IP Framework.^⁶ The CTS is continuously updated, so conformance always reflects quality against the current specification.

For enterprise buyers, understanding a vendor’s conformance status and trajectory gives a clearer picture of implementation quality than product descriptions alone. Vendors across the industry are at different stages of this process, and knowing where a given product sits, and what the roadmap toward full conformance looks like, is a useful input to procurement decisions.

Hololight’s XR Streaming technology is designed to be conformant with OpenXR. The technology is based on a published Khronos Specification and is expected to pass the Khronos Conformance Process.

Questions to Ask Your XR Vendor About OpenXR Conformance

OpenXR as the Foundation for Enterprise XR Streaming

In most XR setups, the device that does the rendering also needs access to the underlying data, which means sensitive files sit on hardware that can be lost, stolen, or connected to an insecure network. XR streaming changes this.

XR streaming moves the computation to a server in a controlled environment. The application executes entirely on that server, whether on-premise, in a private cloud, or in an air-gapped environment, and only the rendered output as encoded pixels is transmitted to the headset over the network. The headset decodes and displays those pixels; it never receives, stores, or processes the underlying application or its data. OpenXR functions as the standard interface layer on the server side, meaning any OpenXR-compatible application can run through a conformant streaming implementation without modification.

Hololight’s XR Streaming technology follows this model. By streaming only pixels from server to headset, never the underlying data, Hololight enables organizations in defense, automotive, and manufacturing to deploy XR at enterprise scale without compromising data sovereignty. The application and its data remain within the customer’s own infrastructure across on-premise workstations, private server deployments, and air-gapped environments, while the headset functions as a display terminal rather than a data endpoint. The technology is designed to be conformant with OpenXR: it is based on a published Khronos Specification and is expected to pass the Khronos Conformance Process.

BMW Group has applied this model at its Munich pilot plant, using XR streaming to validate vehicle components at full 1:1 scale in AR. All rendering runs on BMW's own servers; only encrypted pixels reach the headset, and sensitive design data never leaves BMW's infrastructure. The deployment saved up to 12 months per development cycle by replacing time-consuming physical prototype builds with digital holographic validation.

For a direct comparison between OpenXR and the standard it has largely superseded for new enterprise development, see our OpenXR vs. OpenVR: The Enterprise Developer’s Guide (2026).