web3j
Lightweight Java and Android library for integration with Ethereum clients.
What is web3j?
Web3j is a lightweight, highly modular, reactive, type-safe Java and Android library for writing smart contracts and integrating with Ethereum blockchains. It enables developers to work with Ethereum without the additional overhead of creating their own integration code for the platform. Web3j supports auto-generation of Java smart contract wrappers, Ethereum Name Service (ENS), and integration with providers like Alchemy and Infura. It is compatible with both Solidity and Truffle definition formats.
Web3 dapps and developer tools related to web3j
Discover blockchain applications that are frequently used with web3j.
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.
web3j alternatives
Explore web3 competitors and apps like web3j.
Alchemy Notify
Orderly Network
ARC (AI Rig Complex)
MoralisApp 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.
