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Mirror Networking

mirror-networking.com

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Spec score 8.1 #10 of 29 in Game Networking Middleware

What it is

Mirror Networking is a free system for adding multiplayer capabilities to Unity games. It uses a server-authoritative model by default and supports dedicated servers as well as client hosts. Core tools include message handlers, serialization, distributed object management, and state synchronization. Unity components such as NetworkManager, NetworkIdentity, and NetworkBehaviour connect game objects and scripts, with automatic synchronization for transforms and script variables. Built-in transport choices include KCP UDP, Telepathy TCP, WebSockets, a multiplexer, latency simulation, encryption, and Edgegap Relay. Other transport connections include Steam, Epic Online Services, LiteNetLib, and ENet. Mirror is MIT licensed, with no paywalls or CCU costs. The maker says it stores no user data and performs no tracking, analytics, or advertising. Its feature list marks lag compensation and encryption as Beta, unreliable sync mode as in development, and bitpacking and prediction as being researched. The GitHub README recommends Unity 2019, 2020, 2021, 2022 LTS, or 6000.1 to get started.

Spec sheet

Product
Mirror is a system for building multiplayer capabilities for Unity games.Read 2 Oct 2026 · mirror-networking.gitbook.io
Intended users
Mirror is presented as a Unity networking library for multiplayer games across genres, including small MMORPGs.Read 2 Oct 2026 · github.com
Integrations
Additional transports connect Mirror with Steam, Epic Online Services, Edgegap Relay, and third-party LiteNetLib and ENet implementations.Read 2 Oct 2026 · mirror-networking.gitbook.io
Security
The maker says Mirror follows common information security practices, has over 80% test coverage, and relies on no closed-source dependencies other than Unity.Read 2 Oct 2026 · github.com
Privacy
The maker says the Mirror netcode stores no user data and does no tracking, analytics or advertising.Read 2 Oct 2026 · mirror-networking.com
Support
The maker invites users to contact [email protected] with questions or policy review requests and says it is happy to help with projects.Read 2 Oct 2026 · github.com
Headquarters
GermanyRead 28 Sep 2026 · mirror-networking.com
Authority model
Mirror is server authoritative by default and supports both dedicated servers and client hosts.Read 2 Oct 2026 · mirror-networking.gitbook.io
Compatibility
The maker’s GitHub README recommends Unity 2019, 2020, 2021, 2022 LTS and 6000.1 to get started.Read 2 Oct 2026 · github.com
Core features
Mirror provides message handlers, high performance serialization, distributed object management and state synchronization.Read 2 Oct 2026 · mirror-networking.gitbook.io
Features in development
The maker’s feature list marks lag compensation and encryption as Beta, unreliable sync mode as Development, and bitpacking and prediction as Researching.Read 2 Oct 2026 · github.com
Licensing and fees
Mirror is MIT licensed, and the maker says there are no paywalls or CCU costs.Read 2 Oct 2026 · github.com
Transports
Built-in transports include KCP UDP, Telepathy TCP, WebSockets, a multiplexer, latency simulation, encryption and Edgegap Relay transports.Read 2 Oct 2026 · mirror-networking.gitbook.io
Unity integration
Mirror uses Unity components including NetworkManager, NetworkIdentity and NetworkBehaviour, and supports automatic synchronization of transforms and script variables.Read 2 Oct 2026 · mirror-networking.gitbook.io

Plans and prices

Mirror Networking Free Free and open source (MIT) · No paywalls · No CCU costs Read 2 Oct 2026 · github.com

Every Mirror Networking plan and price →

Strong points and limits

Strong points

  • Server-authoritative by default
  • Supports dedicated servers and client hosts
  • Includes UDP, TCP, and WebSocket transports
  • MIT licensed with no CCU costs

Limits

  • Matchmaking is not included
  • Lag compensation and encryption are Beta
  • Bitpacking and prediction remain under research

Who it suits

Mirror suits Unity developers building multiplayer games that need server-client networking across desktop, mobile, WebGL, or Linux servers. Its listed uses span game genres, including small MMORPGs.

Verdict

Mirror provides a Unity-focused networking foundation with multiple transport choices and integration options. Its feature status labels matter: several listed capabilities are still in beta, development, or research.

Where Specifiction places it

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