🫱 TrustBuddy — Interoperable Trust for the Internet 🌐✨

👋 Hey CalHacks! We’re Aya and William, and we built TrustBuddy — your reputation passport across Web2 and Web3 💼🔗

💭 The Problem

You found the perfect deal on Facebook Marketplace... but no one’s replying 😢 Or you’re trying to rent that dreamy Airbnb for your big family weekend — but hosts keep ignoring you 👀

Why? Because your profile is ✨ blank ✨

Your 5⭐ Uber rating doesn’t help you on Marketplace. Your flawless eBay score means nothing to an Airbnb host.

Your trust is locked inside the apps you use — isolated and invisible.

💡 The Idea

What if your hard-earned trust could follow you anywhere?

Introducing TrustBuddy 🫱 — a decentralized reputation system that lets you import your ratings and build interoperable trust across Web2 and Web3, powered by Ethereum ⚡

🔁 How It Works

1️⃣ Connect your ETH wallet 💰 2️⃣ Upload screenshots of your ratings (Uber, Lyft, Marketplace, Airbnb, etc.) 📸 3️⃣ Our AI (Gemini 2.5 Flash) extracts verified rating info 🧠✨ 4️⃣ Your TrustBuddy profile compiles everything into a single, portable reputation dashboard 🪪 5️⃣ Companies + DApps can verify your score through your wallet address or ENS name 🪙

No more starting from zero. No more invisible trust. Just you — verified, visible, and vouchable 💪

⚙️ Tech Stack

🧠 Gemini 2.5 Flash → AI image analysis for extracting ratings from screenshots 🪙 Ethereum Sepolia Testnet → where our smart contract lives 🧩 Scaffold-ETH → used for frontend + contract debugging 💻 Next.js + Ethers.js → buttery-smooth frontend integration

🎯 Why It Matters

Every time you switch platforms, you rebuild your reputation from scratch. With TrustBuddy, your digital trust moves with you.

✅ Safer marketplaces ✅ Verified users ✅ A more trustworthy internet

💬 Closing Words

We hope you’ll join us in building interoperable trust across Web2 and Web3, powered by Ethereum, so you’ll never have to start from 0 again 🫶

Built With

• canva
• ethereum
• figma
• nextjs