
Chai
Chai is a BDD/TDD assertion library compatible with JavaScript testing frameworks.

What is Chai?
Chai is a BDD/TDD assertion library for Node.js and the browser, often used alongside Mocha. It provides clean syntax that almost reads like English for developers to test applications from both behavioral and functional standpoints. Developers can extend Chai's stock testing assertions with interfaces and plugins to cover as many use cases as they need from its official plugin registry. Chai is chain agnostic.
Web3 dapps and developer tools related to Chai
Discover blockchain applications that are frequently used with Chai.
Developer resources from Alchemy

Top enterprise blockchain solutions in 2026
Discover how enterprises are bringing their business onchain.

Blockchain RPC infrastructure evaluation guide for enterprises
Choosing the wrong blockchain RPC provider can mean costly migrations and poor performance. Use this enterprise evaluation framework to ask the right questions before you commit.

Building the future of secure crypto wallets with Zengo & Alchemy
In the world of cryptocurrency, security breaches and wallet hacks make headlines almost daily. But amid these stories of loss and vulnerability, one company has maintained a perfect security record.
Chai alternatives
Explore web3 competitors and apps like Chai.
App store listings are independently reviewed and written by Alchemy using a combination of inbound submissions, editorial research, public project sources, and third-party directories, including ecosystem data from The Grid under the Open Database License, DefiLlama, DappRadar, Reown, and chain ecosystem pages.

