Foundry

Rust-based contract toolchain

frameworktestingRust

getfoundry.shUpdated 2026-11-02

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About

Foundry is a fast Rust-written smart-contract toolchain with fuzz testing, gas reports and Solidity scripting — much faster test runs than older frameworks, and the default choice for new projects.

Test speed is the headline advantage; fuzzing finds edge cases normal tests miss. The command-line workflow differs from older frameworks — expect a learning curve.

Main uses

Fuzz testing
Gas reports
Solidity scripting

Site info

CategoryDevelopers

TypeFramework

LanguagesEnglish

AccessCLI

FeesFree

FAQ

What's Foundry's advantage?

Tests written in Solidity with blazing-fast compile and fuzz runs; forge and cast cover dev through on-chain interaction.

Is Foundry hard to pick up?

If you know Solidity, the Getting Started book gets you productive in an afternoon.

How do I reach the official Foundry site safely?

The “Visit official site” button on this page points to Foundry’s official address: getfoundry.sh. Fake clones are common in crypto — verify the domain and bookmark this page or the official URL.

Does Foundry cost money?

Free

Visit official site ↗