Benchmark // 3
Compare devices
Channels
0
PiEEG XR
Best in group
0
OpenBCI Ganglion
—
Varjo XR-4
Resolution bits
0
PiEEG XR
Best in group
0
OpenBCI Ganglion
Best in group
—
Varjo XR-4
Price (USD)
—
PiEEG XR
0.0$
OpenBCI Ganglion
Lowest price
0$
Varjo XR-4
beta
- Sensors
- EEGface-EMGEOG
- XR platforms
- Meta Quest
- Sampling rate
- 250 Hz
- Wireless
- SPI to Raspberry Pi / USB
- SDK
- open PiEEG stack (Python); LSL
- Raw data access
- unrestricted (open)
- Subscription required
- No
- Best for
- students, makers, low-budget BCI+VR experiments
- Limitations
- beta; requires a Raspberry Pi; DIY assembly; forehead montage
OpenBCI Ganglion
OpenBCI
shipping
- Sensors
- EEGEMG
- XR platforms
- —
- Sampling rate
- 200 Hz
- Wireless
- BLE (dongle sold separately)
- SDK
- GUI + BrainFlow
- Raw data access
- unrestricted (open)
- Subscription required
- No
- Best for
- low-cost neurofeedback, simple BCI, education
- Limitations
- 4 channels; no microSD; BLE compression
Varjo XR-4
Varjo
shipping
- Sensors
- eye-trackingpupillometryIMU
- XR platforms
- standaloneVarjo
- Sampling rate
- 200 (eye tracking) Hz
- Wireless
- tethered (DisplayPort/USB-C)
- SDK
- Varjo SDK; OpenXR; eye-tracking API
- Raw data access
- eye/gaze data via SDK
- Subscription required
- Yessome enterprise features need a Varjo subscription
- Best for
- high-fidelity MR, the hardware base Galea builds on, gaze research
- Limitations
- no neural sensing itself; tethered; enterprise pricing