Web3 Hackathon Projects | Code Examples & Inspiration

Looking for blockchain Web3 blockchain project ideas? Our library of 41+ Web3 hackathon projects offers real-world implementations, code samples, and detailed case studies.

Showing 41 projects sponsored by The Graph.

AdFHE

FHE-based personalized advertising protocol: Displaying relevant ads while safeguarding user confidentiality.

infrastructuregamingsocialprivacy
🏆 Best use of Fhenix Stack3rd place (Fhenix)🏆 Best Use of Hyperlane (Hyperlane)🏆 Best New Subgraph3rd place (The Graph)🏆 🏆 ETHGlobal Brussels Finalist (ETHGlobal)
ETHGlobal Brussels • 2024

Angpao.money

Angpao.money is a magic-link utility to make receiving crypto as intuitive as handing over cash in an envelope. Absolute zero dependency: install nothing and gas-free, Angpao.money hyper-charge onboarding by bridging the UX gap, making every transfer fun, personal and memorable.

daosocial
🏆 Best SubstreamGrand Prize (The Graph)🏆 Best use of ENS1st place (ENS)🏆 Pool Prize (Worldcoin)🏆 🏆 ETHGlobal Singapore 2024 Finalist (ETHGlobal)
ETHGlobal Singapore • 2024

CalCast

Create and Book calls with reputation gating in Farcaster using Frames

social
🏆 Best use of The Graph NetworkRunner Up (The Graph)🏆 Most Creative Frame (Base)🏆 🏆 Frameworks Finalist (ETHGlobal)
Frameworks • 2024

CanaryBay

Come watch canaries hatch, eat, and die, in the newest onchain canary registry. See what is true and what no longer might be.

daoinfrastructure
🏆 Pool Prize (Chiliz)🏆 Best Use of Subgraph🥇 Grand Prize (The Graph)🏆 Best Frontend Component Built with BOS2nd Place (NEAR Protocol)🏆 Pool Prize (Arbitrum)🏆 Deploy on Scroll (Scroll)
ETHGlobal Istanbul • 2024

Clarity

Clarity is a payment gateway designed to tackle the multibillion-dollar problem of fake reviews by enabling seamless, verifiable on-chain payments and reviews.

Rustnftinfrastructure
🏆 Best New SubgraphGrand Prize (The Graph)🏆 Best Overall Application (Sign Protocol)🏆 Best Consumer Application (Sign Protocol)🏆 Best Use of World ID2nd place (Worldcoin)🏆 🏆 ETHGlobal Singapore 2024 Finalist (ETHGlobal)
ETHGlobal Singapore • 2024

DAOsaster

Built a decentralized, autonomous disaster response system using AI agents, drones, and blockchain to detect disasters and coordinate responses without relying on traditional infrastructure.

Rustnftinfrastructure
🏆 Best Use of Zero Gas Fees2nd place (SKALE Network)🏆 Blockchain and Robotics (Nethermind)🏆 Best dApp Built on Blockless (Blockless)🏆 Best New Subgraph1st place (The Graph)🏆 Most Creative Use Case (Story)🏆 🏆 ETHGlobal San Francisco 2024 Finalist (ETHGlobal)
ETHGlobal San Francisco • 2024

DeFiDataDex

DeFiDataDex is a decentralized marketplace for retail DeFi traders to upload, buy, and curate high-quality datasets. Earn Filecoin tokens for contributing and curating data. Ensuring transparency and data integrity through decentralized storage.

Next.jsdefinft
🏆 Best Use of Subgraph2nd place (The Graph)
ETHGlobal Brussels • 2024

Degen Drink

Discover Degen Drink - an innovative drink dispenser for events! 🍹 Utilizes multi-chain and NFC wristbands for payments, offering 17 different drinks. Easy to use, rechargeable wallets, perfect for conferences! #TechDrinks #BlockchainBar

JavaScriptNext.jsnftsocialprivacy
🏆 Innovation Pool Prize (WalletConnect)🏆 Best Use of SubgraphRunner - up (The Graph)🏆 Pool Prize (Arbitrum)🏆 Deploy on Scroll (Scroll)🏆 Best use of zkSync (zkSync)🏆 Innovate on Gnosis Chain (Gnosis Chain)🏆 Best HaLo Use2nd Place (Arx)
ETHGlobal Istanbul • 2024

DegenOS

DegenOS is a decentralized OS built on Cartesi Rollups & Avail DA, featuring wallet/email login & six Web3 apps: token swaps, block explorer, DeFi metrics, social lookup, token risk analysis & recipe sharing. A unified platform for essential Web3 services.

TypeScriptNode.jsdefinftdaoinfrastructuresocialprivacy
🏆 Build a dApp showcasing Avail integration2nd place (Cartesi)🏆 Blockscout Explorer Big Pool Prize (Blockscout)🏆 Best Cartesi x Avail integrated project1st place (Avail)🏆 Best use of The Graph3rd place (The Graph)
ETHGlobal Bangkok • 2024

EcoWarp

We crafted a unique marketplace for farcaster frames, where sellers list products & create ERC1155 NFTs, and buyers receive personalized recommendations using ML. We leverage Pinata for IPFS & casts, indexing with The Graph. Revenue comes from listing fees & sales commissions.

SolidityPythonNext.jsdefinftinfrastructureprivacy
🏆 Best use of The Graph NetworkPool (The Graph)
Frameworks • 2024

Friend Fries

Friend Fries 🍟 is a platform that allows users to create and complete bounties using the NFC chips in their ETHGlobal bracelets.

PostgreSQLsocial
🏆 Best New Subgraph1st place (The Graph)
ETHGlobal Brussels • 2024

GraphSearch Tools

GraphSearch Tools is a tool to help users quickly query the world of blockchain data with the help of The Graph Network.

ReactTypeScriptJavaScriptNext.jsinfrastructure
🏆 Best Use of SubgraphRunner - Up (The Graph)
ETHGlobal Singapore • 2024
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