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Square Cloud runs almost any stack — Discord, WhatsApp and Telegram bots, websites and APIs, background workers, and full applications — on the same fast, secure infrastructure. You bring the code and a small configuration file; the platform detects the language, installs the dependencies, and runs it.

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Supported languages

JavaScript

Python

Java

Rust

Elixir

PHP

Go

C#

Ruby

Beyond these, many other languages and libraries work out of the box. The runtime images are flexible enough to adapt to most projects.

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Versions

Every runtime ships two channels you can pin with the VERSION field in your configuration file: recommended (stability) and latest (newest). You can also pin an exact version.
Languagerecommendedlatest
Node.js [JS & TS]24.15.026.1.0
Python3.13.133.14.5
JavaJDK 25JDK 25
Elixir1.19.51.19.5
Rust1.95.01.95.0
Ruby4.0.44.0.4
PHP8.5.68.5.6
Go1.26.31.26.3
.NET/C#10.0.810.0.8
Prefer recommended unless you specifically need a newer release. See the configuration file for the VERSION and RUNTIME fields.

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How it works

1

Language detection

Square Cloud detects your language automatically from the files in your upload (for example a package.json for Node.js or a requirements.txt for Python). You can override detection with the RUNTIME field in the configuration file.
2

Dependency install

Your dependencies file (package.json, requirements.txt, Gemfile, go.mod, …) is installed server-side, so you don’t need to ship node_modules or a virtual environment inside the .zip.
3

Start command

The MAIN field points at your entry file and the platform runs it with the right interpreter. For a custom start command (build steps, a static server, etc.) set START instead.

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What’s included in every runtime

Node.js 26 + tooling

Every image bundles Node.js 26 alongside the primary language, so build tooling and JS-based utilities are always available.

ffmpeg & Chromium

Media processing (ffmpeg) and a headless browser (Chromium) come preinstalled — handy for media bots, scraping and PDF/screenshot generation.

Runs as non-root

Applications run as an unprivileged user for a safer, isolated environment.

Static sites

No runtime needed? Set RUNTIME=static (or html) to serve a plain HTML/CSS/JS site directly.

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Next steps

Configuration file

Learn the MAIN, START, RUNTIME and VERSION fields.

Practical tutorials

Deploy real projects, step by step, in your language of choice.