OpenZeppelin Defender
OpenZeppelin Defender lowers risk factors as you deploy smart contracts through a SecOps toolchain.
What is OpenZeppelin Defender?
OpenZeppelin Defender is a mission-critical developer security platform by OpenZeppelin for coding, auditing, deploying, monitoring, and operating blockchain applications with confidence. Users can use it to monitor and set actions in motion when smart contracts are compromised. Developers can create scripts to automate the execution of smart contracts. They can also build smart chain maintenance pipelines with embedded vaults, meta-transactions, and API key management. Note: New sign-ups were disabled on June 30, 2025, and the platform is scheduled for final shutdown on July 1, 2026. Migration guides to open-source replacements (OpenZeppelin Monitor, OpenZeppelin Relayer) are available.
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ERC-1271 signature replay vulnerability
On October 27th 2023, Alchemy discovered a ERC1271 contract signature replay vulnerability that affected a large number of smart contract accounts (SCA), and led to risks when interacting with several applications.
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OpenZeppelin Defender alternatives
Explore web3 competitors and apps like OpenZeppelin Defender.
Solidity Shield
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