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Photon Engine vs Unity AR Foundation

Photon Engine logo

Photon Engine

Game Development

Hosted multiplayer networking billed by concurrent users, not by seat or by player

From
Free
Rated
-
Full reviewWebsite
Unity AR Foundation logo

Unity AR Foundation

AR VR

Unified AR development framework for Unity

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Photon Engine billing follows peak concurrent users, so a single stream or a launch weekend raises the bill immediately, and studios that cannot forecast concurrency cannot forecast the cost of their own launch.; Unity AR Foundation requires platform-specific plugins (ARCore, ARKit) to actually implement AR features
  • They diverge on capability: Photon Engine covers Concurrent user billing, Unity AR Foundation covers Plane detection.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Photon Engine and Unity AR Foundation actually diverge.

Attributes where Photon Engine and Unity AR Foundation differ
AttributePhoton EngineUnity AR Foundation
Pricing modelPer month by peak concurrent usersUnknown
PlatformsWindows, macOS, Linux, iOS, Android, Web, ConsoleiOS, Android, visionOS, HoloLens 2, Meta Quest, Unity Editor
CategoryGame DevelopmentAR VR
FoundedUnknown2004

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

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 Photon Engine

  • Concurrent user billing
  • Photon Fusion
  • Photon Quantum
  • Photon Voice and Chat
  • Global relay
  • Matchmaking and rooms

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.

Photon Engine

  • Adding multiplayer to a Unity game without hiring a network engineernot Unity AR Foundation
  • Competitive titles needing deterministic rollback rather than state synchronisationnot Unity AR Foundation
  • Games with a large but thinly spread player base, where concurrency stays low and per player pricing would cost morenot Unity AR Foundation
  • Training and simulation projects that need shared real-time state outside gamesnot Unity AR Foundation

Unity AR Foundation

  • VR Gamingnot Photon Engine
  • AR Marketingnot Photon Engine
  • Virtual Trainingnot Photon Engine
  • 3D Visualizationnot Photon Engine
  • Immersive Experiencesnot Photon Engine

Where each one falls short

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

Photon Engine

  • Billing follows peak concurrent users, so a single stream or a launch weekend raises the bill immediately, and studios that cannot forecast concurrency cannot forecast the cost of their own launch.
  • Exceeding the band does not degrade gracefully; additional players are refused connections until concurrency falls or the plan is upgraded, which is a visible outage to your players at the worst possible moment.
  • PUN, the product most tutorials and courses still teach, is legacy, so a large share of the learning material available online points new projects at the wrong SDK.
  • Self-hosting is an enterprise arrangement rather than a purchasable licence, so a studio that wants its servers on its own infrastructure for cost or compliance reasons cannot simply buy that.
  • It is a networking layer only; accounts, persistence, leaderboards, inventories and anti-cheat all come from other services, so the multiplayer stack ends up as several vendors rather than one.

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

Photon Engine

Free
  • FreeFree
    • A small concurrent user allowance for development and early testing
    • All regions available
    • No time limit on the free tier
  • Entry band$9/month
    • Around one hundred concurrent users
    • Full SDK access
    • Regional server selection
  • Higher bands$undefined/month
    • Sold in steps up to tens of thousands of concurrent users
    • Price rises with each band rather than with total players
    • Enterprise and self-hosted arrangements handled directly by Exit Games

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 Photon Engine if

  • You need concurrent user billing.
  • You want to start without paying.
  • You work on Windows, macOS, Linux, iOS, Android, Web, Console.
  • You also want photon fusion.
Photon Engine 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 Photon Engine or Unity AR Foundation better?
Neither clearly leads. Photon Engine 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, Photon Engine or Unity AR Foundation?
Photon Engine starts at Free and Unity AR Foundation at Free.
Does Photon Engine or Unity AR Foundation run on more platforms?
Photon Engine runs on Windows, macOS, Linux, iOS, Android, Web, Console. Unity AR Foundation runs on iOS, Android, visionOS, HoloLens 2, Meta Quest, Unity Editor.
Can I use Photon Engine for free?
Both have a free tier, so you can try either at no cost before committing.
What is Photon Engine best used for?
Photon Engine is most often used for adding multiplayer to a unity game without hiring a network engineer, competitive titles needing deterministic rollback rather than state synchronisation, games with a large but thinly spread player base, where concurrency stays low and per player pricing would cost more, training and simulation projects that need shared real-time state outside games. Of those, adding multiplayer to a unity game without hiring a network engineer and competitive titles needing deterministic rollback rather than state synchronisation are not what Unity AR Foundation is typically brought in for.
What can Photon Engine do that Unity AR Foundation cannot?
Photon Engine covers Concurrent user billing, Photon Fusion, Photon Quantum, Photon Voice and Chat. Unity AR Foundation covers Plane detection, Image tracking, Face tracking, Point clouds.

Answered from the vendors’ own pages

Photon Engine: What exactly is a concurrent user?

A player connected to Photon at that moment. Your plan is sized by the peak of that number, not by downloads, registered accounts or monthly actives.

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
Photon Engine: Which product should a new project use?

Fusion for most real-time games, Quantum where determinism matters such as fighting and competitive titles. PUN is legacy and should not start a new project despite the volume of tutorials.

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
Photon Engine: Does it work outside Unity?

Unity is the first-class target. Unreal and other engines are supported through Realtime SDKs with less coverage and slower feature parity.

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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