# L2BEAT privacy protocols

> Privacy protocols on Ethereum and its layer 2s tracked by L2BEAT, with their category and exit window.

Analysis of privacy protocols on Ethereum focusing on the CROPS principles: censorship resistance, open source, privacy and security.

## Privacy protocols (/privacy/projects/{slug})

- [Cloaked](https://l2beat.com/privacy/projects/cloaked): Stealth address, exit window: Infinite. A stealth-address wallet that receives every payment on a fresh address, with passkey login and an Incognito balance in Privacy Pools.
- [Fluidkey](https://l2beat.com/privacy/projects/fluidkey): Stealth address, exit window: Infinite. A stealth-address wallet that receives every payment on a fresh Safe, with optional yield and bank transfers.
- [Privacy Pools](https://l2beat.com/privacy/projects/privacy-pools): Pool, exit window: Infinite. A privacy pool system for any amount, where only centrally approved deposits can be withdrawn privately.
- [Railgun](https://l2beat.com/privacy/projects/railgun): Shielded ledger, exit window: 7d. A shielded ledger on Ethereum for ERC-20 tokens, with private transfers and DeFi calls, run by no operator and governed by RAIL stakers.
- [STRK-20](https://l2beat.com/privacy/projects/strk20): Shielded ledger, exit window: None. A shielded ledger on Starknet for any ERC-20 token, with private transfers and DeFi, where one auditor key can decrypt every user's history.
- [Tornado Cash](https://l2beat.com/privacy/projects/tornado-cash): Pool, exit window: Infinite. An unconditional privacy pool of fixed amounts with immutable contracts, and an app pinned on ENS by token governance.
- [Umbra Cash](https://l2beat.com/privacy/projects/umbra): Stealth address, exit window: Infinite. A stealth-address payment protocol for an existing wallet: the user registers once, and anyone can pay them at a fresh address.
- [Zama Confidential Tokens](https://l2beat.com/privacy/projects/zama-confidential-tokens): Confidential amounts, exit window: None. Confidential amounts for ERC-20 tokens on Ethereum: wrappers that encrypt balances and transfer amounts with FHE, decrypted by a committee of KMS operators.
- [Monero via Cake Wallet](https://l2beat.com/privacy/projects/monero-cake-wallet): Shielded ledger, exit window: None. A shielded ledger round trip: Cake Wallet's swap screen moves Ethereum funds into Monero and back, handing each leg to a centralized instant exchange.
- [Zcash via NEAR Intents](https://l2beat.com/privacy/projects/zcash-near-intents): Shielded ledger, exit window: None. A shielded ledger round trip: Zodl swaps Ethereum funds into shielded ZEC and back through NEAR Intents, which custodies the Ethereum side.
- [Privacy Boost](https://l2beat.com/privacy/projects/privacy-boost): Shielded ledger, exit window: None. A shielded ledger for ERC-20 tokens on Base, aimed at institutional users, whose privacy rests on the operator's TEE.
- [zk.money](https://l2beat.com/privacy/projects/zkmoney): Shielded ledger, exit window: Infinite. A shielded ledger on Aztec Network for DAI payments and sUSDS savings, with funds escrowed on Ethereum.
- [zkAPI](https://l2beat.com/privacy/projects/zkapi): Anonymous access, exit window: None. Anonymous access to AI models, prepaid with ETH, that hides which deposit pays for which request.
- [Payy](https://l2beat.com/privacy/projects/payy): Shielded ledger, exit window: None. A shielded ledger L2 for USDC payments in a mobile app, with payment links and a card, that hides amounts but not which notes fund which.