The Valve Index is a virtual reality headset that was made and produced by Valve. It was introduced on April 30, 2019, and became available for purchase on June 28, 2019. This headset is the second version of a VR device and the first one completely made by Valve. It comes with the game Half-Life: Alyx. In November 2025, Valve announced a new version of the headset called Steam Frame, which is planned to be released in early 2026.
Development
The Valve Index is the first virtual reality headset created and made by Valve itself. It was designed to be the main equipment for Valve's future virtual reality games, beginning with the release of Half-Life: Alyx. Work on a headset developed directly by Valve started around 2015, as reported by employees, before the launch of their Vive headset with HTC. In February 2021, Valve applied for patents for a new VR headset, which included improvements compared to the earlier model.
Release
The Valve Index sold about 149,000 units in 2019. Of these, 103,000 were sold in the fourth quarter after Valve announced its main VR game, Half-Life: Alyx, which was given for free to owners of the Valve Index. The high demand caused the device to sell out in all 31 countries except Japan in January 2020. Valve had expected to have enough units available for people who ordered the Index before the March 2020 release of Half-Life: Alyx. However, the COVID-19 pandemic slowed production, leaving Valve with fewer units available on the release date. By January 2025, 13.2% of VR devices connected to Steam were Valve Index units.
Technical specifications
The headset has two high-resolution LCD screens, each with a size of 1440 by 1600 pixels. Each pixel can show all colors, and the screens have a fast refresh rate (0.330 milliseconds at 144 Hz). The headset uses special lenses to help the user see a wide view. Together, the screens provide a combined resolution of 2880 by 1600 pixels. The screens support refresh rates of 80, 90, 120, or 144 Hz. The estimated field of view is 108 degrees. The screens and lenses can be adjusted horizontally to fit the user’s eye distance (IPD), which can be set between 58 and 70 millimeters using a slider beneath the displays.
The headset and controllers use a tracking system called Lighthouse, which works with all previous HTC Vive base stations through SteamVR. The Valve Index uses Lighthouse 2.0, which relies on external base stations to track movement in 3D. These base stations are small, rectangular boxes placed around the room that send out invisible infrared light and laser patterns. The headset and controllers have sensors that detect these signals to determine their position and orientation.
Each base station has two spinning laser emitters that create a sweeping laser pattern across the room. Unlike Lighthouse 1.0, which used a separate infrared light for timing, Lighthouse 2.0 uses a more advanced timing system built into the lasers. The sensors on the headset and controllers detect the laser beams to determine their exact location relative to the base stations. Usually, two base stations are used to cover the space fully and reduce blind spots, though more can be added to expand the tracking area.
Although the Valve Index uses external base stations, its tracking system is considered inside-out because the sensors are attached to the headset and controllers themselves. These sensors process tracking data internally, which is different from outside-in systems that use fixed cameras or sensors outside the tracked objects.
In addition to the base stations, the headset and controllers have Inertial Measurement Units (IMUs) that track movement and orientation quickly, though they can drift slightly over time. The Lighthouse system corrects this drift by using the base stations’ lasers to provide precise position data, combining this with the IMU information to maintain accurate tracking during fast movements.
This combination of external base stations and internal sensors ensures the Valve Index provides accurate and responsive tracking.
The headset is designed to work with the Valve Index Controllers, also known as Knuckles Controllers, and is compatible with older HTC Vive and HTC Vive Pro controllers. The controllers have a thumbstick, touchpad, two face buttons, a menu button, a trigger, and 87 sensors that track hand position, finger movement, motion, and pressure to create a realistic hand representation in VR. The controllers also include an accelerometer for additional movement measurements. In 2018, a technology demo called Moondust showed an early version of the Knuckles.
The Index includes "a pair of ultra near-field, full-range, off-ear (extra-aural) headphones" that use Balanced Mode Radiator (BMR) drivers to produce clear and deep sounds. The headset also has a built-in microphone.
Unlike its successor, the Steam Frame, the Index requires a wired connection to a computer.