Railgun
AuditedVerifiedRAILGUN 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.
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Score history
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The Problem
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 Mixers like Tornado Cash break composability — once funds enter, they cannot interact with DeFi until withdrawn — and are increasingly sanctioned.
The Solution
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.
Why it Matters
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.
Protocol Metrics
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View allFrequently asked questions about Railgun
What is Railgun?+
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.
How does Railgun work?+
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.
Is Railgun safe?+
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, 3 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.
What is the safety score of Railgun?+
Railgun has a DeFi Sentinel safety score of 73/100 (rating A), last updated September 16, 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%).
Which chains does Railgun support?+
Railgun is deployed on Ethereum, Arbitrum, Polygon, BNB Chain.
Has Railgun been audited?+
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.