Announcing Contracts 5.0: Our latest major release is full of modernizations and efficiency improvements.Read the blog 
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Technology, processes, and people to minimize risk when launching and scaling. Ship faster and more safely.
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Comprehensive developer security: from day one to audit
Summon our team of security experts to verify your system works as intended with the highest level of scrutiny. Track issues and resolutions, and interact directly with auditors for faster and more efficient communication.
Learn about Audits
Develop using security best practices, community-vetted libraries, and the most commonly adopted ERC standards.
Explore Contracts Library
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Automatic code analysis for differences, vulnerabilities, improvements, gas costs, and test runs. Powered by machine learning intelligence and state-of-the-art tools.
Discover OpenZeppelin Code
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Test, execute, and verify deployments and upgrades across chains securely, with adding just 5 lines of code to your existing Hardhat (and soon Foundry) configuration.
// hardhat-config.js require('@openzeppelin/hardhat-upgrades'); require('dotenv').config(); module.exports = { defender: { apiKey: process.env.API_KEY, apiSecret: process.env.API_SECRET, } }
import { ethers, defender } from "hardhat"; async function main() { const Box = await ethers.getContractFactory("Box"); const deployment = await defender.deployProxy(Box); await deployment.waitForDeployment(); console.log(`Contract deployed at ${deployment.getAddress()}`); }
Detect and respond instantly to incidents with the right tools
Gain full visibility into your smart contracts' risks and behaviors. Detect threats, get alerts on threats and anomalies, and automatically respond and resolve issues.
Check out Monitor
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Instantly detect, respond, and resolve threats and attacks with pre-defined actions and scenarios. Conduct attack simulations and test real-world scenarios on a forked network.
Explore Incident Response
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Use Actions to implement custom app logic for on-chain and off-chain operations. Enable automated response to threats detected by OpenZeppelin's Monitor and Incident Response.
Discover Actions
The OpenZeppelin Defender platform
Industry-leading security expertise and world-class intelligence embedded into the developer workflow
400+
Audits Performed
$15B+
Balance held in OpenZeppelin Contracts
94%
Of top 20 DeFi protocols use OpenZeppelin Contracts
Built as the result of 7 years developing and auditing
the world’s most popular smart contracts
“Collaborating with OpenZeppelin on our security audit was a productive and positive experience. We appreciated their thoroughness and attention to detail”
“OpenZeppelin has been performing excellent work on behalf of the protocol.”
“I have a very high opinion of the OpenZeppelin team and their work.”
"One of the most trusted experts in this space since forever. Their contracts were there and helped me do my job and the reputation is impeccable."
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"We can't wait to see what developers are going to build on Base next, with additional peace of mind provided by OpenZeppelin."
"Working with OpenZeppelin has given our institutional clients an extra layer of confidence, trust, and ease when interacting with the enterprise-grade Hedera network. As technical partners, they have proven invaluable to helping secure smart contracts built on the network and we greatly look forward to our continued collaboration."
