Slither
Trail of Bits (Crytic)Best for Static analyzer for Solidity and Vyper
Catch A clean run doesn't mean a contract is secure; AGPL-3.0
- Chains
EthereumAny EVM chain- Price
- Free (open source)
Ethereum security and auditing tools
4 security and auditing tools whose own docs name Ethereum, compared on price, network and the catch. Checked against each maker's own pages; last updated Oct 18, 2026.
| Tool | Best for | Price | Ethereum | Catch |
|---|---|---|---|---|
| Slither | Static analyzer for Solidity and Vyper | Free (open source) | Mainnet | A clean run doesn't mean a contract is secure; AGPL-3.0 |
| Echidna | Property-based fuzzer for EVM contracts | Free (open source) | Mainnet | Only as good as the invariants you write; AGPL-3.0 |
| Tenderly | Transaction simulation, debugging and monitoring | Free plan; team plans custom-quoted | Mainnet | Team plans are quote-only, and BNB Chain wasn't on its node list |
| OpenZeppelin Monitor | Self-hosted on-chain monitoring and alerts | Free (open source, self-hosted) | Mainnet | Self-hosted, so you run and maintain it; AGPL-3.0 |
Compare two side by side: Slither vs Echidna · Slither vs Tenderly · Slither vs OpenZeppelin Monitor · Echidna vs Tenderly
Echidna
Trail of Bits (Crytic)Best for Property-based fuzzer for EVM contracts
Catch Only as good as the invariants you write; AGPL-3.0
- Chains
- EthereumAny EVM chain
- Price
- Free (open source)
Best for Transaction simulation, debugging and monitoring
Catch Team plans are quote-only, and BNB Chain wasn't on its node list
- Chains
- Ethereum
Base
Arbitrum
Polygon
Avalanche - Price
- Free plan; team plans custom-quoted
OpenZeppelin Monitor
OpenZeppelinBest for Self-hosted on-chain monitoring and alerts
Catch Self-hosted, so you run and maintain it; AGPL-3.0
- Chains
- Ethereum
Solana
StellarAny EVM chain - Price
- Free (open source, self-hosted)
See every Ethereum developer tool or all Security & auditing picks. Prices change often, so confirm on each maker's page.
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