Defender
OpenZeppelin Defender is a mission-critical developer security platform to code, audit, deploy, monitor, and operate blockchain applications with confidence.
Integrating directly into the developer workflow, Defender makes it easy and fast for developers and operators to prevent and fix security issues pre and post-deployment.
Defender legacy is now deprecated in favor of Defender. Learn how to migrate here! On June 1st 2024, you will no longer have access to Defender 1.0 UI and API. |
Modules
Defender modules work seamlessly together, providing users powerful features and a superior, integrated experience. Learn more about each module by clicking on its card.
Available networks
Defender works with most mainnet and testnet networks, as well as local mainnet forks.
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Ethereum Mainnet, Sepolia testnet and Holesky testnet.
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zkSync Era Mainnet, zkSync Era Goerli and zkSync Era Sepolia.
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Polygon (Matic) Mumbai, zkEVM and zkEVM Testnet
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Arbitrum One, Arbitrum Nova, Arbitrum Sepolia and Arbitrum Goerli.
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Optimism, Optimism Sepolia and Optimism Goerli.
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Moonbeam, Moonriver, and Moonbase Alpha (Testnet).
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Gnosis Chain and Sokol.
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Binance Smart Chain and BSC testnet.
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Avalanche C and FUJI C-Chain.
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Fuse.
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Fantom and Fantom Testnet.
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Celo and Alfajores.
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Harmony Shard 0 and Harmony Testnet Shard 0.
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Aurora and Aurora Testnet.
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Hedera and Hedera Testnet.
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Base Mainnet, Base Sepolia and Base Goerli.
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Linea Mainnet and Linea Goerli.
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Scroll Mainnet and Scroll Sepolia.
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Mantle Mainnet and Mantle Testnet.
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Meld Mainnet and Meld Testnet.
If there is any other network or layer-2 solution you would like to use from Defender, please reach out to us via the form on Defender!
Status
You can check the status of Defender and the supported networks on our status page, where you can also subscribe to receive notifications. If a supported network experiences issues, some features in Defender for that network may not work properly.
Integrations
Integrations throughout Defender allow users to connect with other services and tools. Find the list of integrations and more information here.
Service Level and Support Agreement
For our paid subscriptions, we’re offering enhanced service reliability, guaranteed uptime, and priority support. You can learn more on our Service Level and Support Agreement (SLA) page.