Hardhat

Hardhat is the Ethereum development environment that made Solidity development feel like real software engineering. Local blockchain for testing, console.log in Solidity (finally), stack traces for reverts, and a TypeScript-first plugin ecosystem.

If you're building smart contracts and your team thinks in JavaScript/TypeScript, Hardhat is still the most productive choice. Foundry is the rising challenger — Rust-powered, Solidity-native testing, and 5-10x faster compilation. It's eating Hardhat's market share among performance-focused teams. Brownie serves Python developers. Truffle is the legacy option — don't start new projects there.

Hardhat's plugin ecosystem is its moat. Ethers.js integration, deployment scripts, verification tools, and gas reporting all work out of the box. The Hardhat Network gives you a local EVM that actually tells you why your transaction reverted.

The catch: Foundry is just faster. If your team can write Solidity tests in Solidity (instead of JS), compilation is 3-4x quicker and test execution is dramatically faster. Many serious DeFi teams now use Foundry for core contracts and Hardhat only for deployment scripts and frontend integration.