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Babylon.js vs Unity AR Foundation

Babylon.js logo

Babylon.js

Software

Powerful 3D engine for the web with WebXR

From
Free
Rated
-
Full reviewWebsite
Unity AR Foundation logo

Unity AR Foundation

Software

Unified AR development framework for Unity

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Babylon.js javaScript-only framework; requires developer expertise to implement and maintain; Unity AR Foundation requires platform-specific plugins (ARCore, ARKit) to actually implement AR features
  • They diverge on capability: Babylon.js covers WebGL/WebGPU rendering, Unity AR Foundation covers Plane detection.

Where they differ

Only the attributes on which Babylon.js and Unity AR Foundation actually diverge.

Attributes where Babylon.js and Unity AR Foundation differ
AttributeBabylon.jsUnity AR Foundation
PlatformsWeb, Native (via Babylon Native Runtime), React NativeiOS, Android, visionOS, HoloLens 2, Meta Quest, Unity Editor
Founded19752004

Identical on both: starting price (Free), pricing model (Unknown), free tier (Yes), user rating (Not yet rated), category (Unknown).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Babylon.js

  • WebGL/WebGPU rendering
  • Physics engines
  • GUI system
  • Node material editor
  • WebXR
  • glTF
  • Havok physics
  • Azure

Only in Unity AR Foundation

  • Plane detection
  • Image tracking
  • Face tracking
  • Point clouds
  • ARKit
  • ARCore
  • OpenXR
  • Magic Leap

What people use each for

The jobs each tool is most often brought in to do.

Babylon.js

  • Web 3D rendering engine for games, e-commerce product configuration, and interactive experiencesnot Unity AR Foundation
  • Cross-platform 3D development with native runtime and React Native supportnot Unity AR Foundation

Unity AR Foundation

  • VR Gamingnot Babylon.js
  • AR Marketingnot Babylon.js
  • Virtual Trainingnot Babylon.js
  • 3D Visualizationnot Babylon.js
  • Immersive Experiencesnot Babylon.js

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Babylon.js

  • JavaScript-only framework; requires developer expertise to implement and maintain

Unity AR Foundation

  • Requires platform-specific plugins (ARCore, ARKit) to actually implement AR features
  • Performance varies significantly by device, with battery drain and heat generation on mobile
  • Emulators cannot accurately test AR experiences due to missing camera and sensor data
  • No WebXR support for browser-based AR experiences
  • Occlusion features show lower performance at 25-40 FPS compared to other features at 40-60 FPS
  • Limited access to latest platform-specific features compared to native ARKit or ARCore

Pricing, plan by plan

Babylon.js

Free

No published plan breakdown. See the Babylon.js review.

Unity AR Foundation

Free
  • Included with Unity PersonalFree
    • Free for individuals and small teams with under $200K revenue/funding
    • AR Foundation package included
    • Access to all core AR features
  • Included with Unity Pro$185/month
    • Professional tier licensing
    • AR Foundation package included
    • All core AR features plus Pro-level support

Which should you pick?

Choose Babylon.js if

  • You need webgl/webgpu rendering.
  • You want to start without paying.
  • You work on Web, Native (via Babylon Native Runtime), React Native.
  • You also want physics engines.
Babylon.js review

Choose Unity AR Foundation if

  • You need plane detection.
  • You want to start without paying.
  • You work on iOS, Android, visionOS, HoloLens 2, Meta Quest, Unity Editor.
  • You also want image tracking.
Unity AR Foundation review

Questions people ask

Is Babylon.js or Unity AR Foundation better?
Neither clearly leads. Babylon.js starts at Free and Unity AR Foundation at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Babylon.js or Unity AR Foundation?
Babylon.js starts at Free and Unity AR Foundation at Free.
Does Babylon.js or Unity AR Foundation run on more platforms?
Babylon.js runs on Web, Native (via Babylon Native Runtime), React Native. Unity AR Foundation runs on iOS, Android, visionOS, HoloLens 2, Meta Quest, Unity Editor.
Can I use Babylon.js for free?
Both have a free tier, so you can try either at no cost before committing.
What is Babylon.js best used for?
Babylon.js is most often used for web 3d rendering engine for games, e-commerce product configuration, and interactive experiences, cross-platform 3d development with native runtime and react native support. Of those, web 3d rendering engine for games, e-commerce product configuration, and interactive experiences and cross-platform 3d development with native runtime and react native support are not what Unity AR Foundation is typically brought in for.
What can Babylon.js do that Unity AR Foundation cannot?
Babylon.js covers WebGL/WebGPU rendering, Physics engines, GUI system, Node material editor. Unity AR Foundation covers Plane detection, Image tracking, Face tracking, Point clouds.

Answered from the vendors’ own pages

Unity AR Foundation: Is Unity AR Foundation free?

Yes, AR Foundation is free and included with Unity. It is a package within the Unity engine, though you need a Unity license (available free for personal use with under $200K revenue).

Source
Unity AR Foundation: What platforms does AR Foundation support?

AR Foundation supports iOS (via ARKit), Android (via ARCore), visionOS, HoloLens 2 (via OpenXR), and Meta Quest (via OpenXR). Testing in the Unity Editor is available through XR Simulation.

Source
Unity AR Foundation: Do I need additional plugins to use AR Foundation?

Yes. AR Foundation is an abstraction layer and requires platform-specific plugins: ARCore XR Plugin for Android and ARKit XR Plugin for iOS. These plugins implement actual AR features using native SDKs.

Source
Unity AR Foundation: Can I test AR experiences in the Unity Editor?

AR Foundation supports XR Simulation in the Editor for early testing, but accurate AR testing requires real devices because emulators cannot replicate camera and sensor data accurately.

Source
Unity AR Foundation: Does AR Foundation support web-based AR?

No, AR Foundation does not support WebXR. Unity has stated there are no current plans to add WebXR support to AR Foundation. Web AR requires alternative solutions like 8th Wall.

Source
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