RAILGUN is an on-chain zk-SNARK privacy smart-contract system that lets users shield ERC-20 balances and execute private DeFi interactions on Ethereum, BSC, Polygon, and Arbitrum without bridges or layer-2s.
Move tokens into a private balance, transact inside a growing anonymity set, then unshield — no fixed denominations, no mixer withdrawal.
+498.75 USDC credited privately as a new commitment
Deposit any amount of an ERC-20 into the RAILGUN contract — not a fixed denomination like a mixer. A 0.25% fee is taken and the rest is credited to your private 0zk balance as a new zk commitment. Etherscan shows only that you interacted with RAILGUN, never how much you now hold.
Slide to any amount — RAILGUN has no fixed denominations.
Your transaction hides among 1-in-1,400 indistinguishable balances.
The 0.25% shield/unshield fee flows to the on-chain RAIL treasury, distributed to stakers every 2 weeks.
Live signals detected by Sentinel monitors across all five risk classes.
See each alert's affected component, root-cause analysis, and recommended action. Pro members get the full risk breakdown for every protocol.
Public blockchains expose every wallet's full transaction history, balance, and DeFi activity. Mixers like Tornado Cash break composability — once funds enter, they cannot interact with DeFi until withdrawn — and are increasingly sanctioned.
Railgun provides on-chain zk-SNARK privacy that preserves composability: shielded balances can be transferred, swapped, or lent inside DeFi via the Cookbook SDK while remaining indistinguishable from other shielded balances.
Unlike mixers, Railgun is a smart-contract privacy *layer* — shielded tokens remain user-owned, do not require withdrawal to a fresh address to be usable, and can be composed with arbitrary DeFi recipes. No bridge, no L2, deployed natively on each supported chain.
Railgun is a Privacy protocol operating on Ethereum, Arbitrum, Polygon, BNB Chain. RAILGUN is an on-chain zk-SNARK privacy smart-contract system that lets users shield ERC-20 balances and execute private DeFi interactions on Ethereum, BSC, Polygon, and Arbitrum without bridges or layer-2s.
Railgun provides on-chain zk-SNARK privacy that preserves composability: shielded balances can be transferred, swapped, or lent inside DeFi via the Cookbook SDK while remaining indistinguishable from other shielded balances.
DeFi Sentinel rates Railgun A with a safety score of 73/100, indicating low-to-moderate risk. The score reflects five risk dimensions: smart contract & technical risk, economic design & market risk, governance & centralization, sustainability & competitive position, and reputation & social trust. Railgun has 2 audits on record. DeFi Sentinel's analysis flagged 6 medium, 5 low risk alerts across Smart Contract & Technical Risk, Economic Design & Market Risk, Governance & Centralization, Sustainability & Competitive Position and Reputation & Social Trust. As with all DeFi protocols, residual risk remains and users should review the full risk breakdown before depositing.
Railgun has a DeFi Sentinel safety score of 73/100 (rating A), last updated July 8, 2026. The score is computed across smart contract & technical risk (30%), economic design & market risk (25%), governance & centralization (20%), sustainability & competitive position (15%), and reputation & social trust (10%).
Railgun is deployed on Ethereum, Arbitrum, Polygon, BNB Chain.
Yes. Railgun has 2 audit reports on record from firms including ABDK Consulting, Zokyo. Audit reports and dates are linked under the Resources tab on this page.
