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.
Subscriptions
Defender offers flexible subscriptions to match your team’s needs and support your project at any scale.
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Builder (Free) - Suitable for individuals and small projects that are getting started on testnets and need access to all basic features with limited quotas.
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Professional - For mature projects running on mainnets that need access to premium features, higher quotas and metered billing, as well as access to OpenZeppelin support and SLA.
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Enterprise - For large projects with higher volumes that need a custom plan to meet their project needs, with higher quotas, access to all premium and security features, and a dedicated support channel.
Defender also offers a free 14-day trial that you can enable at any point to try the premium features included in our Professional and Enterprise subscriptions. For more information, check out the Defender
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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Arbitrum One, Arbitrum Nova, Arbitrum Sepolia.
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Aurora and Aurora Testnet.
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Avalanche C and FUJI C-Chain.
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Base Mainnet and Base Sepolia.
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Binance Smart Chain and BSC testnet.
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Celo and Alfajores.
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Ethereum Mainnet, Sepolia testnet and Holesky testnet.
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Fantom and Fantom Testnet.
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Fuse.
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Hedera and Hedera Testnet.
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Japan Open Chain and Japan Open Chain Testnet.
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Linea Mainnet and Linea Sepolia.
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Scroll Mainnet and Scroll Sepolia.
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Mantle Mainnet and Mantle Sepolia.
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Meld Mainnet and Meld Testnet.
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Moonbeam, Moonriver, and Moonbase Alpha (Testnet).
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Optimism, Optimism Sepolia.
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Polygon (POL), Amoy, zkEVM and Polygon Cardona zkEVM testnet
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Scroll Mainnet and Scroll Sepolia.
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zkSync Era Mainnet, zkSync Era Sepolia.
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.