Your AI twin that lives forever.

Create your AI-powered digital twin that lives forever.

Ditto lets you build a personalized AI that thinks, speaks, and responds the way you do — grounded in your real personality, memories, and voice. Ask it questions, and it answers as you would. The longer you go, the more Ditto will shape to become you.

Winner of CxC 2026 - Best use of ElevenLabs

Users build their twin through three inputs:

Once built, anyone can talk to the twin and get responses that reflect the real person's personality, memories, and voice.

Next.js (Frontend)
  |
  +-- Auth0 (Authentication)
  +-- Three.js / React Three Fiber (3D Avatar)
  +-- Tailwind CSS (Styling)
  |
API Routes (Backend)
  |
  +-- Backboard.io (RAG Memory + Google Gemini LLM)
  +-- ElevenLabs (Voice Cloning + TTS + Transcription)
  +-- Supabase / PostgreSQL (Data Storage)
  +-- Solana Devnet (Blockchain Identity Verification)

1. Personality modeling — Quiz results are scored into a type (e.g. INFP-T) and formatted into a system prompt that instructs the LLM to embody the user's personality, emotional style, and communication patterns.

2. Memory (RAG) — Diary entries are embedded into Backboard.io's vector store. When a question is asked, the most relevant entries are retrieved and injected as context alongside the personality prompt.

3. Generation — The combined context is sent to Google Gemini, which generates a response grounded in both personality and real memories.

4. Voice synthesis — The response is spoken aloud using the user's cloned voice via ElevenLabs TTS, with real-time lip-sync on the 3D avatar.

Users can optionally commit a SHA-256 hash of their twin's data to Solana, creating a permanent, verifiable proof of identity without exposing personal data on-chain.

• Node.js 18+
• npm

# Clone the repository
git clone https://github.com/your-username/cxc2026.git
cd cxc2026

# Install dependencies
npm install

# Set up environment variables
cp .env.example .env.local
# Fill in your API keys (see .env.example for details)

# Start the development server
npm run dev

Open http://localhost:3000.

See .env.example for all required keys:

• Auth0 — Authentication
• Supabase — Database
• Backboard.io — AI memory and RAG
• ElevenLabs — Voice cloning and TTS
• Solana RPC — Blockchain (optional)

npm run dev       # Start development server
npm run build     # Production build
npm run start     # Start production server
npm run lint      # Run ESLint

• A community market where people (like celebrities, professors, politicians) can create and post their AI twins. Allowing people to talk to them as if they were face-to-face in real life. It can be charged via Solona or other forms of currency.

• Harrison Yu
• Kartheek Chinta
• Khush Patel
• Rishi Chakrabarty

AGPL-3.0 license

DISCLAIMER: We do not condone any immoral and improper use of Ditto. Please use responsibly.