Contract.dev

Powerful EVM Sandboxes

Private testnets that replay mainnet with built-in analytics, simulations, and developer tools.

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HOW IT WORKS

Production-grade smart contract staging

Test in realistic conditions. Inspect with dedicated analytics. Run large-scale contract simulations.

How it works
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USAGE

Supporting on-chain development

Trusted by developers building EVM applications.

5,000 +

Stagenets created

500 +

Active developers

10,000 +

Contracts imported from GitHub

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PLATFORM FEATURES

Upgrade your smart contract workflow

Everything you need to ensure your contracts are mainnet-ready.

// Stagenets

Testnets that replicate mainnet

Stagenets replay mainnet blocks, allowing testing under realistic conditions.

mainnet replay

// ci/cd

Import contracts from GitHub

Import contracts from repositories to enable tailored tools and analytics.

cicd

// defi integrations

Simulate and analyse DeFi

Dedicated dashboards and tools for building with protocols and infrastructure.

cicd

// simulations

Test contracts with rapid transaction flows

Simulate 1000s of transactions to stress-test contract behaviour.

cicd

// contract analytics

Deep visibility into contract behaviour

Analyse any on-chain activity with rich dashboards built-in to your Stagenet.

cicd
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Integrations

Built for EVM development

Ethereum
Base
Optimism
Arbitrum
Hyperliquid
Polygon
Unichain
Hardhat
Foundry
GitHub
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FAQ

Frequently Asked Questions

Stagenets are private testnets that replay mainnet blocks, allowing contracts to be tested under realistic conditions. They include built-in contract analytics, developer tooling, and a framework for running on-chain simulations.

Public testnets often diverge significantly from mainnet state. Stagenets replicate realistic on-chain conditions and include built-in tooling, analytics, and simulations, allowing you to test your contracts more deeply.

You can import contracts from a Hardhat or Foundry project on GitHub into your Stagenet. When deployed on your Stagenet, their deployments gain dedicated analytics and tools for tailored development.

Stagenets are shared environments that your team can access through the platform, making it easy to collaborate on deployments, simulations, and analysis.

Just like a real EVM blockchain, Stagenets expose a standard Ethereum JSON-RPC interface. This means you can interact with them using familiar tools — frameworks like Hardhat or Foundry, wallets like MetaMask, or libraries such as ethers.js or viem.

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Get Started

Supercharge yoursmart contract development

Deploy to a copy of mainnet with powerful built-in tools.