The second installment of the Privacy4Web3 (P4W3) hackathon has ended. After three months, the competition to create new applications using Sapphire or Runtime Offchain Logic (ROFL) wrapped up, and the winners were announced. Selecting which projects were most deserving of the bounties was no easy task. From the entire Oasis team, a sincere thank you to all participants.

Keep reading for a full list of winners and previews of what they've built. 

What is the P4W3 Hackathon?

This iteration of Privacy For Web3 was based on the idea that both crypto and AI need privacy that's customizable and easily accessible. So, this year's event encouraged developers to build novel applications with Oasis' confidential EVM, Sapphire, and the freshly launched ROFL framework. ROFL allows offchain components to communicate with the onchain realm, extending Sapphire and opening up a new world of use cases. 

In total, the 2024 edition of P4W3 attracted 150+ participants. 

The 2024 P4W3 Hackathon Winners

SQUIDL - A privacy-focused platform that makes managing payments simple and secure. Squidl enables privacy-first payments with untraceable transactions, static payment links for easy sharing, and support for crypto and credit cards. Watch the demo here.

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Futures Onchain - A project that delivers an onchain futures trading solution on Sapphire, using ROFL. Users can trade ERC-20 futures linked to currencies like ETH with real-time pricing and machine learning for accurate, transparent trading. Watch the demo here.

PrivaHealth - Tackles the rising issue of healthcare data breaches. PrivaHealth ensures patients control their medical data, that doctors access records securely, and that health centers manage data efficiently. Learn more here.

Copyright Aware AI - CAAI empowers creators to securely protect, monetize, and share their unique styles and ideas in the age of AI-driven creativity on the blockchain. Watch the demo here.

CompensatePaw3 - A payroll dApp on Sapphire meant to transform how businesses manage and execute salary payments. Combines the transparency and security of blockchain with the privacy-preserving power of zero-knowledge proofs. See the demo here. 

PrivateFeedback - An application that aims to revolutionize the feedback process, delivering actionable insights while prioritizing user privacy and security. Watch the demo here. 

Stablecoin Private Transactions [CLPD] - Introduces privacy-focused transactions to Chilean Peso Stablecoin (CLPD). With Sapphire, the project integrates private transaction capabilities that give users more control over their financial data. Demo here. 

Minesweeper - A Minesweeper game on Sapphire that ensures fair, tamper-proof gameplay via secure RNG for random mine placement, solving trust issues in traditional online games. Onchain betting adds transparency, allowing players to bet and win confidently. Watch the demo here. 

Embedded Wallets Powered by Oasis

Oasis-btc - A project built to add Bitcoin private key generation and transaction signing capabilities to the smart contract system, enabling secure management of Bitcoin private keys. Check it out here.

ROFL - RNG Recovery - A project that's designed to extend Apillon's embedded wallet with the goal of making recovery easier while also preserving user privacy. View the demo here.‍

Email Authentication With Social Recovery - Gives users stronger account security, making accounts easy to manage and recover. Features like email verification and social media recovery help protect users from losing access or unauthorized use of their accounts. More here.

Ocean Nodes - Tokenized Intelligence

DeFlow - An application that streamlines complex AI model training and data processing tasks. Enables users to build and execute computation graphs visually, where each node represents a server, and each edge signifies data flow between nodes. Check out the full demo here.

Confidential Data Exchange - A decentralized solution designed for secure AI models and dataset trading, with a strong focus on privacy-preserving data sharing and confidential computation. More here.

Learn More About the Winners

As the privacy layer for Web3 and AI, Oasis is continually pushing the limits on what is possible with onchain privacy. This includes supporting the ideas that emerge from within our ecosystem and through events such as the P4W3 hackathon. In the coming weeks, there will be opportunities to dive deeper into the winning projects. Some of these builders – and their projects – will be explored in more detail on community channels such as Discord and X and through longer articles and the Rose Petal Newsletter. Congratulations to all P4W3 hackers!