> For the complete documentation index, see [llms.txt](https://zeno-mix.gitbook.io/zeno-mix-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://zeno-mix.gitbook.io/zeno-mix-docs/introduction/concept.md).

# Concept

**ZENO Mixer** is the first fully on-chain, Solana-native privacy mixer using a hybrid of zk-STARKs (for post-quantum resistance) and optimized CoinJoin (for low fees). Designed to exploit Solana’s speed while preserving anonymity, it’s the only mixer with:

**ZENO Pools**: Dynamic, auto-rebalancing SOL/SPL pools (1 SOL, 5 SOL, 10 SOL, 50 SOL)

**Zero-Knowledge Light Clients**: Proof generation in <500ms (thanks to Solana’s Sealevel runtime)

**Stealth Addresses by Default**: No need for manual note management (unlike Ethereum mixers)

**MEV-Proof**: Uses Solana’s priority fee system to prevent frontrunning

***

**Why Solana?**

| Metric                   | ZENO (Solana) | Tornado (Ethereum) |
| ------------------------ | ------------- | ------------------ |
| **Avg. Mix Time**        | 2 min         | 30 min             |
| **Fee (1 SOL)**          | 0.2 SOL       | 0.5 ETH            |
| **Anonymity Set (2025)** | 50k+/pool     | 1k/pool            |