Luau icon
Luau icon

Luau

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Luau (lowercase u, /'lu.a?/) is a fast, small, safe, gradually typed embeddable scripting language derived from Lua.

Luau Icon

License model

  • Free • Open Source

Application type

Country of Origin

  • US flagUnited States

Platforms

  • Mac
  • Windows
  • Linux
A snippet of code
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5 / 5 Avg rating (1)
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Features

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Properties

  1.  Lightweight

Features

  1.  Lua scripting

 Tags

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Luau information

  • Developed by

    US flagRoblox

  • Licensing

    Open Source (MIT) and Free product.

  • Written in

  • Alternatives

    75 alternatives listed

  • Supported Languages

    • English

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Development

GitHub repository

  •  4,538 Stars
  •  428 Forks
  •  265 Open Issues
  •   Updated Jun 13, 2025 
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Luau was added to AlternativeTo by headlines on Nov 9, 2021 and this page was last updated Jan 6, 2023.
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What is Luau?

Luau (lowercase u, /'lu.a?/) is a fast, small, safe, gradually typed embeddable scripting language derived from Lua icon Lua.

It is designed to be backwards compatible with Lua 5.1, as well as incorporating some features from future Lua releases, but also expands the feature set (most notably with type annotations). Luau is largely implemented from scratch, with the language runtime being a very heavily modified version of Lua 5.1 runtime, with completely rewritten interpreter and other performance innovations. The runtime mostly preserves Lua 5.1 API, so existing bindings should be more or less compatible with a few caveats.

Luau is used by Roblox icon Roblox game developers to write game code, as well as by Roblox engineers to implement large parts of the user-facing application code as well as portions of the editor (https://alternativeto.net/software/roblox-studio/about/) as plugins. Roblox chose to open-source Luau to foster collaboration within the Roblox community as well as to allow other companies and communities to benefit from the ongoing language and runtime innovation.

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