Sunder Your IdentityFrom Your Data.
The local-first privacy firewall that scrubs PII from AI prompts before they ever leave your browser. Fast. Private. Open Source.
Hi, I'm John Smith and my email is john.smith@acme.com.
Can you help me debug this? My API key is sk-abc123xyz.
I'm connecting from 192.168.1.100.Hi, I'm [PERSON_1] and my email is [EMAIL_1].
Can you help me debug this? My API key is [SECRET_1].
I'm connecting from [IP_ADDR_1].How It Works
Three simple steps to keep your identity safe while using AI
Intercept
Sunder hooks into your chat or API call locally.
Before any data leaves your machine
Sunder
Our Rust-WASM engine replaces PII with context-aware tokens.
E.g., john@acme.com → [EMAIL_1]
Reveal
AI responses are re-hydrated with your original data.
Only on your screen, nowhere else
Built for Privacy Purists
Engineering-grade protection without compromises
WASM Powered
Near-native speed with Rust security.
Compiled to WebAssembly for maximum performance
Zero-Server
Your raw data never touches our servers.
100% client-side processing
Identity Vault
Total control over your token-to-identity mappings.
View, manage, and nuke at any time
Model Agnostic
Works with OpenAI, Claude, Gemini, and Local LLMs.
Any AI provider, same protection
What We NEVER See
No Emails
We never see your email addresses
No Logs
Zero server-side logging
No Prompts
Your prompts stay on your device
No API Keys
Your credentials are yours alone
All processing happens locally in your browser. We can't see your data even if we wanted to — it never leaves your device.