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.

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.

Code Inspector Automatic code analysis powered by AI models and tools developed by our security experts.

Audit Manage the smart contract audit process and track issues and resolutions.

Deploy Manage deployments and upgrades to ensure secure releases.

Relayers Send transactions to the blockchain via Defender automatically.

Monitor Detect smart contract activity and anomalies through trigger actions and alerts.

Transaction Proposals Create transactions to be executed on-chain.

Actions Create automated actions to perform on-chain and off-chain operations.

Address Book Create a shared repository of user-friendly names for your accounts or contracts.

Access Control Manage smart contract accounts, roles, and permissions easily.

Available networks

Defender works with most mainnet and testnet networks, as well as local mainnet forks.

Arbitrum One, Arbitrum Nova, Arbitrum Sepolia.
Aurora and Aurora Testnet.
Avalanche C and FUJI C-Chain.
Base Mainnet and Base Sepolia.
Binance Smart Chain and BSC testnet.
Celo and Alfajores.
Ethereum Mainnet, Sepolia testnet and Holesky testnet.
Fantom and Fantom Testnet.
Fuse.
Gnosis Chain and Sokol.
Harmony Shard 0 and Harmony Testnet Shard 0.
Hedera and Hedera Testnet.
Linea Mainnet and Linea Goerli.
Mantle Mainnet and Mantle Sepolia.
Meld Mainnet and Meld Testnet.
Moonbeam, Moonriver, and Moonbase Alpha (Testnet).
Optimism, Optimism Sepolia.
Polygon (Matic) Mumbai, zkEVM and zkEVM Testnet
Scroll Mainnet and Scroll Sepolia.
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.

Feedback

As a Defender user, your feedback is important! Please provide us feedback by accesing the form on the bottom-right corner of your screen.