OpenSeeFace

At a glance

• Editor score
  3.0 / 10
• Pricing
  Free plan
• Best for
  Developers building real-time facial tracking workflows
• Free plan
  Yes
• Paid from
  Free
• Character retargeting
  Yes
• Facts checked
  24 Sep 2026

• Where it wins

  • Tracks facial landmarks and expressions in real time using CPU inference.
  • Accepts webcam or video input and sends tracking data over UDP.
  • Includes Unity components and a VRM avatar animation sample project.

• Where it doesn't

  • Focused on facial tracking; it does not cover body or hand tracking.
  • The command-line tracker requires Python dependencies outside Windows releases.
  • It is a tracking library, not a standalone avatar-puppeteering program.

Our verdict on OpenSeeFace

OpenSeeFace is an open-source library for real-time facial landmark and expression tracking, aimed at developers building facial workflows rather than buyers seeking a complete motion-capture suite. Its CPU inference supports webcam and video-file input, and the command-line tracker can send tracking data over UDP for processing on a separate computer. The project is self-hosted and supports Windows and Linux; Windows executable releases are available, while running scripts on other platforms requires Python dependencies.

Its strongest fit is a pipeline that needs to move face-tracking data into another application. UDP output provides a route to separate processing, while Unity components receive and visualize tracking data. A sample project shows animation with VRM models. Multiple pretrained models offer speed and accuracy trade-offs, and facial-expression detection includes per-user calibration. These pieces make OpenSeeFace useful as a focused component in a real-time workflow, not as an all-in-one capture and avatar application.

The scope is deliberately narrow: the listed capabilities cover face tracking, not body or hand tracking. Buyers who need broader motion capture should consider a different tool; likewise, those looking for a standalone avatar-puppeteering program should not treat this library as one. For developers comfortable integrating a self-hosted tracker, its open-source availability, CPU inference, UDP output, and Unity and VRM examples are relevant strengths. The project documents its use, so buyers should expect a library-oriented workflow rather than a turnkey application.

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OpenSeeFace pricing

OpenSeeFace fact sheet

OpenSeeFace integrations

OpenSeeFace lists 2 integrations on its own site.

• Unity
• VRM

Alternatives to OpenSeeFace

• Vicon ShogunA mature Windows suite for detailed optical, markerless, and finger motion capture.8.9
• XAXsens AnimateA mature inertial capture suite for live production, offline export, and complex scenes.8.8
• Autodesk MotionBuilderA character-animation workspace with mocap retargeting, control rigs and FBX exchange.8.7

See all OpenSeeFace alternatives →

Featured on iTechGuides

OpenSeeFace is listed in our Motion Capture Software directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update