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Top 23 Web3 Open-Source Projects
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Project mention: Web3 Growth Stack Explained: Tools, KPIs & Strategies for Onchain Growth | dev.to | 2026-03-23
Hey: Focuses on building privacy-centric social experiences.
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SaaSHub
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Documentation
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full-blockchain-solidity-course-py
Ultimate Solidity, Blockchain, and Smart Contract - Beginner to Expert Full Course | Python Edition
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DefiLab
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Project mention: The Private Piggy Bank: A Beginner's Guide to Confidential Smart Contracts with CoFHE | dev.to | 2026-05-19
Now imagine putting that piggy bank on a giant public billboard in the middle of a city. Suddenly, everyone walking past can see exactly how much you have saved. That is exactly what happens when you store financial data on a public blockchain like Ethereum. Every single number, deposit, balance, and transactions becomes visible to anyone in the world, forever.
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web3-react
A simple, maximally extensible, dependency minimized framework for building modern Ethereum dApps
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PoWFaucet
Modularized faucet for EVM chains with different protection methods (Captcha, Mining, IP, Mainnet Balance, Gitcoin Passport and more)
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Project mention: Getting Started with Gaia: A Developer's Guide to Building AI Agents with Gaia | dev.to | 2025-09-04
# Install Gaia node curl -sSfL 'https://github.com/GaiaNet-AI/gaianet-node/releases/latest/download/install.sh' | bash # Initialize with your preferred model gaianet init --config https://raw.githubusercontent.com/GaiaNet-AI/node-configs/main/llama-3-groq-8b-tool/config.json # Start your node gaianet start
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project_web3.0
This is a code repository for the corresponding video tutorial. In this video, we're going to build a Web 3.0 React Solidity Blockchain Application
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ethereum-boilerplate
The ultimate NextJS Ethereum Dapp Boilerplate which gives you maximum flexibility and speed. Feel free to fork and contribute. Although this repo is called "Ethereum Boilerplate" it works with any EVM system and since it uses Moralis SDK You can even use it on Solana! Happy BUIDL!👷♂️
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trystero
✨🤝✨ Build instant multiplayer webapps, no server required — Magic WebRTC matchmaking over BitTorrent, Nostr, MQTT, IPFS, Supabase, and Firebase
Nice idea. I would have expected it would use WebRTC for p2p client-to-client connection. A noted related project is Trystero [0] that uses all sort of external services to allow client-to-client discovery (such as Nostr, BitTorrent, Supabase etc.) - maybe a future project to combine the two.
[0]: https://github.com/dmotz/trystero?tab=readme-ov-file#how-it-...
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web3
Making sense of web3 & crypto. Introduction to key concepts and ideas. Rigorous, constructive analysis of key claims pro and con. A look at the deeper hopes and aspirations.
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NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
Web3 discussion
Web3 related posts
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GraphDB (GDB) – Decentralized P2P Graph Database
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Auditing a Contract With No Source Code: Reading EVM Bytecode
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My Journey into Web3 Auditing
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The Private Piggy Bank: A Beginner's Guide to Confidential Smart Contracts with CoFHE
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Mexican government breached by solo user with Claude, 150 GB exfiltrated
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How Expensive is a Naked AI Agent? The $285M Tragedy & The Inevitability of AIL Architecture
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I Made a CLI That Talks to Any Smart Contract in Plain English
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A note from our sponsor - SaaSHub
www.saashub.com | 11 Jul 2026
Index
What are some of the best open-source Web3 projects? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | hey-1 | 29,383 |
| 2 | gun | 19,070 |
| 3 | full-blockchain-solidity-course-py | 11,221 |
| 4 | ethers.js | 8,701 |
| 5 | awesome-solidity | 7,034 |
| 6 | wagmi | 6,735 |
| 7 | DeFiHackLabs | 6,625 |
| 8 | melonJS | 6,329 |
| 9 | ethereum-org-website | 5,939 |
| 10 | web3-react | 5,692 |
| 11 | PoWFaucet | 5,561 |
| 12 | gaianet-node | 5,022 |
| 13 | project_web3.0 | 4,256 |
| 14 | ethereum-boilerplate | 4,148 |
| 15 | eattheblocks | 3,989 |
| 16 | free-Web3-resources | 3,665 |
| 17 | extension | 3,200 |
| 18 | metamask-mobile | 2,985 |
| 19 | rainbowkit | 2,828 |
| 20 | TypeChain | 2,797 |
| 21 | trystero | 2,630 |
| 22 | web3 | 1,914 |
| 23 | Planet | 1,809 |
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