SatisProof

SatisProof is a gamified, blockchain-powered platform for anonymous event reviews. Attendees can rate their experience across multiple categories without revealing their identity. Each verified review earns non-transferable tokens that build user reputation, encourage honest participation, and reduce fake sign-ups or no-shows. Organizers gain reliable, tamper-proof insights to improve future events, while users compete on a reputation leaderboard based on real attendance and feedback.

We built this project using a Web3 + mobile stack. The frontend is developed in Flutter for a smooth, cross-platform user experience. The backend runs on NestJS, handling event logic, user verification and off-chain services. Smart contracts were written in Solidity and deployed with Hardhat v3, defining the anonymous voting system and issuing non-transferable tokens for each event. We're also implementing Zero-Knowledge proofs to ensure that votes are valid while keeping user identities hidden. Tokens are minted per event to incentivize real feedback, and the system uses a reputation layer to discourage no-shows and reward active participants.