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Blazing fast smart contract development toolkit for Ethereum.

Blockchain DevelopmentDeveloper ToolsTesting & QACrypto & Web3
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Tracked since2026
0 reviews tracked

The Bottom Line

Entry price

Free, no paid tier

Biggest pro

Blazing fast compilation and execution

Biggest con

Primarily command-line based, which might have a learning curve for some

TL;DR - Foundry

  • A command-line toolkit for Ethereum smart contract development.
  • Includes tools for building, testing, deploying, and interacting with contracts.
  • Offers ultra-fast compilation and testing against real chain states.
Pricing: Free forever
Best for: Individuals & startups

What is Foundry?

Editorial review
Foundry is a comprehensive, command-line-based development toolkit designed for building, testing, and deploying smart contracts on the Ethereum blockchain. It provides a suite of tools including Forge for contract development, Anvil for a local development node, and Cast for interacting with on-chain applications. The toolkit is built for speed, offering ultra-fast compilation and the ability to test contracts against real-world chain states. This toolkit is ideal for Ethereum smart contract developers looking for a performant and efficient environment. It streamlines the entire development lifecycle, from initializing projects and running tests to deploying contracts and interacting with various blockchain networks. Its focus on speed and robust testing capabilities helps developers create more reliable and secure smart contracts. Foundry is open-source and community-driven, encouraging contributions and providing support through channels like Telegram and GitHub. It aims to be the 'Swiss Army knife' for anyone working with Ethereum smart contracts.
how we evaluateSourcegetfoundry.sh ↗

Pros & Cons

Pros

  • Blazing fast compilation and execution
  • Comprehensive suite of tools for the entire dev lifecycle
  • Ability to test against real chain state for robust testing
  • Open-source and community-driven with active development
  • Easy to install and get started

Cons

  • Primarily command-line based, which might have a learning curve for some
  • Requires familiarity with Ethereum development concepts

Preview

Key Features

Forge: Build, test, debug, deploy, and verify smart contractsAnvil: Run a local Ethereum development node with JSON-RPC complianceCast: Interact with on-chain applications from the command lineUltra-fast compilation with dynamic_test_linkingTest contracts against real-world chain stateFork mainnet for local developmentLoad and dump state for Anvil nodesCall contract functions and send transactions via command line

Pricing Plans

Pricing checked Jul 10, 2026

Foundry

Free

  • Blazing fast smart contract development toolkit
  • Ultra-fast compilation
  • Performant local node
  • Interact with applications
  • Forge: build, test, debug, deploy and verify smart contracts
  • Anvil: local development node (Ethereum JSON-RPC spec)
  • Cast: interact with onchain applications from the command line
Calculate your costView full pricing

Is Foundry worth the price?

100/10

Foundry is entirely free, offering an incredibly generous and accessible toolkit for smart contract development.

This pricing model is exceptionally fair, as there are no costs associated with its powerful features. It's best for all Ethereum developers, from beginners to seasoned professionals, looking for a robust and free development environment.

Hidden Costs & Gotchas

No hidden costs; it's genuinely free.

Potential costs for external blockchain interactions.

Infrastructure costs for deploying contracts.

How Foundry Compares to Competitors

Foundry stands out significantly against competitors like Hardhat and Truffle, which are also free and open-source. While all provide essential development tools, Foundry's 'free' model is identical to these, making it a direct and equally cost-effective alternative. The choice between them often comes down to ecosystem preference rather than price.

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Best Foundry Alternatives

Top alternatives based on features, pricing, and user needs.

Tenderly logo
TenderlyFreemium

Accelerate on-chain velocity with a full-stack development platform for Web3 professionals.

See all blockchain development tools →

Still deciding?

Most buyers shortlist 2 or 3 tools before committing. Pull a side-by-side comparison or browse the full alternatives shortlist below.

Foundry vs TenderlyHead-to-head: features, pricing, who wins

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Foundry FAQ

How does Foundry facilitate robust testing for smart contracts?

Foundry enables robust testing by allowing developers to test contracts directly against real-world chain states. This capability, combined with its ultra-fast compilation, helps ensure the reliability and security of smart contracts before deployment.

Which teams would benefit most from using Foundry?

Teams of Ethereum smart contract developers looking for a performant and efficient development environment would benefit most from Foundry. It is designed to streamline the entire development lifecycle, from project initialization to deployment and interaction with blockchain networks.

How is Foundry's approach to development different from Tenderly?

Foundry provides a comprehensive, command-line-based development toolkit for building, testing, and deploying smart contracts on Ethereum. It emphasizes speed with ultra-fast compilation and the ability to test against real chain states.

What kind of learning curve should new users expect with Foundry?

New users should expect a learning curve primarily because Foundry is command-line based. Additionally, familiarity with Ethereum development concepts is required to effectively utilize its features.

Does Foundry include a free tier for developers?

Foundry is entirely free to use, as it is an open-source and community-driven project. There are no paid plans required to access its full suite of development tools.

How does Foundry support the full smart contract development lifecycle?

Foundry supports the full smart contract development lifecycle through a suite of tools, including Forge for contract development, Anvil for a local development node, and Cast for on-chain interaction. This streamlines processes from project initialization and testing to deployment.

Can Foundry be used to interact with various blockchain networks?

Yes, Foundry can be used to interact with various blockchain networks through its Cast tool. This allows developers to deploy contracts and manage applications across different Ethereum-compatible environments.

Source: getfoundry.sh

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