web3.js
web3.js was a TypeScript/JavaScript library for connecting dApps with the Ethereum blockchain, sunset on March 4th, 2025.
What is web3.js?
web3.js was a TypeScript/JavaScript library created to help developers connect their dApps with information on the Ethereum blockchain. Using its modular libraries, developers could interact with smart contracts as TypeScript/JavaScript objects, subscribe to on-chain events, get block state directly from Ethereum nodes, and more. Its version 4 was rewritten in TypeScript and provided new features like Plugins. The library had over 500,000 weekly downloads and was used by industry-leading projects such as Truffle. Note: Web3.js libraries were sunset on March 4th, 2025. For migration guides and more details, refer to the ChainSafe blog.
Web3 dapps and developer tools related to web3.js
Discover blockchain applications that are frequently used with web3.js.
Particle Network
Whal3s
Ankr 
Yellow
Developer resources from Alchemy
Webhooks vs WebSockets vs gRPC
Three protocols dominate real-time data delivery. Here's how webhooks, WebSockets, and gRPC differ, when each one breaks down, and how to choose between them.
A developer's guide to the web3 stack
The web3 stack in 2026, layer by layer: networks, infrastructure, smart contracts, wallets, frontends, storage, applications, and the new agentic layer.
How Enya Labs migrated Boba Network to our rollups in less than 1 hour
With deep OP Stack customizations and rapid growth, Boba turned to Alchemy Rollups for a seamless, sub-hour migration and a scalable, developer-ready foundation.
web3.js alternatives
Explore web3 competitors and apps like web3.js.
Alchemy Notify
Orderly Network
Kurtosis
AarcApp 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.
