Is the build in release mode?

Yes. Every build runs cargo build --release automatically — optimized code, no debug overhead.

Can I use any crate from crates.io?

Yes. Square uses your Cargo.toml unmodified. Tokio, Axum, Actix, Rocket, Tonic, and the full async ecosystem are available.

How does Rust compare to Node.js in memory?

Rust has no GC — memory use is predictable. For the same workload, it typically uses significantly less RAM than Node.js, ideal for apps with strict limits.

Do I need to cross-compile?

No. Square compiles in its Linux x86_64 environment. Keep your project cross-platform and there's no extra setup.

Rust bare-metal, zero overhead

Automatic release build and optimized binaries. GC-free performance for critical workloads.

Get started See plans

Why run on Square Cloud

Everything optimized, production-ready.

Release build by default

Optimized code, no debug overhead, enabled automatically.

Native Cargo

Uses your Cargo.toml unmodified — all crates.io crates available.

Predictable memory

No GC, perfect for apps with strict RAM limits.

Hardened containers

Bare-metal performance with container isolation.

Ideal use cases

Where this runtime shines on our platform.

Ultra-high-performance APIs

Axum, Actix-Web, and Rocket backends with Tokio async handling at sub-millisecond latencies.

High-throughput Discord bots

Hosting for serenity and twilight with minimal memory usage and superior throughput.

Heavy processing workers

Compression, cryptography, parsing, and image processing with bare-metal efficiency and zero overhead.

gRPC microservices with Tonic

Typed inter-service communication with bidirectional streaming and Protobuf in production.

Game servers and real-time backends

Apps with sub-ms latency for multiplayer games, leaderboards, and distributed matchmaking.

Trading systems and fintech

Critical workloads with predictable memory, no GC, and consistent latency under heavy load.

Available versions

Pick the track that best fits your project.

Current version

1.95

Single stable toolchain

Technical specs

Everything you need to configure your app.

Accepted extensions: .rs
Dependency file: Cargo.toml
RUNTIME= aliases: rust

Minimal config

Create a squarecloud.app file at your project root:

squarecloud.appRust

MEMORY=512
DISPLAY_NAME=Meu App
VERSION=recommended

Frequently asked questions about Rust Hosting

Release build, Cargo, crates.io, and performance.

Ready to scale your project?

Join hundreds of developers and companies that chose Square Cloud as their infrastructure partner.

Start now on Square Cloud

Predictable pricingNo billing surprisesDeploy in secondsHigh availabilityScale with stability24/7 monitoringSSL and security includedDedicated infrastructure