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@OpenZeppelin

OpenZeppelin

The standard for secure blockchain applications

Welcome to the OpenZeppelin GitHub 👋

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Get Started

OpenZeppelin provides secure smart contract libraries and tools across multiple blockchain ecosystems.

Start from the documentation to choose your ecosystem, libraries, and workflows.

Explore Highlighted Repositories by Ecosystem:

EVM (Solidity)

Arbitrum Stylus (Rust)

Confidential (Zama FHEVM)

Midnight

Polkadot

Starknet (Cairo)

  • cairo-contracts: cairo library for secure smart contract development on Starknet.

Stellar (Soroban)

Sui (Move)


OpenZeppelin Tools and Learning

  • Contracts Wizard: instantly generate boilerplate contracts to bootstrap your next dApp.
  • Ethernaut: interactive wargame that turns you into a Solidity security expert.
  • Monitor: Infrastructure tool for monitoring blockchain events and transactions.
  • Relayer: Infrastructure for relaying transactions on EVM and Non-EVM networks.
  • Role Manager: Open source UI tool providing your users a way to easily assess the status of the roles with your smart contracts.
  • UI Builder: Open source tool for creating UI forms for contracts.

Build with AI

OpenZeppelin provides AI-ready resources for modern development workflows.

  • OpenZeppelin Skills: agent skills for secure smart contract development with OpenZeppelin Contracts libraries.
  • Contracts MCP: allowing AI agents to generate smart contracts using OpenZeppelin Contracts libraries.

Getting Started & Resources

  1. Documentation: learn how to integrate our libraries and tools into your project.
  2. Forum: ask questions, share insights, and get help from our community.
  3. Security Center: all the security details you need to know about OpenZeppelin Contracts
  4. Dune Dashboard: real-time metrics and usage data for OpenZeppelin Contracts across various chains.

Stay Connected

  • X: Follow us for the latest announcements and updates.
  • Blog: Dive deeper into our latest articles, security best practices, and community updates.
  • Careers: Want to build and secure open-source tools and protocols that protect the open economy? We’re hiring!

Pinned Loading

  1. openzeppelin-contracts openzeppelin-contracts Public

    OpenZeppelin Contracts is a library for secure smart contract development.

    Solidity 27.3k 12.4k

  2. openzeppelin-contracts-upgradeable openzeppelin-contracts-upgradeable Public

    Upgradeable variant of OpenZeppelin Contracts, meant for use in upgradeable contracts.

    JavaScript 1.2k 517

  3. openzeppelin-upgrades openzeppelin-upgrades Public

    Plugins for Hardhat and Foundry to deploy and manage upgradeable contracts on Ethereum.

    TypeScript 660 286

  4. ethernaut ethernaut Public

    Web3/Solidity based wargame

    Solidity 2.3k 789

  5. cairo-contracts cairo-contracts Public

    OpenZeppelin Contracts written in Cairo for Starknet, a decentralized ZK Rollup

    Rust 908 396

  6. rust-contracts-stylus rust-contracts-stylus Public

    A library for secure smart contract development written in Rust

    Rust 146 80

Repositories

Showing 10 of 195 repositories
  • guardian Public

    Backup, synchronization, and coordination layer for private accounts.

    OpenZeppelin/guardian's past year of commit activity
    Rust 11 AGPL-3.0 21 37 35 Updated Oct 16, 2026
  • OpenZeppelin/ethernaut-leaderboard's past year of commit activity
    JavaScript 14 MIT 13 2 4 Updated Oct 16, 2026
  • canton-specs Public

    OpenZeppelin reference architectures and experiments for secure smart contract development on Canton

    OpenZeppelin/canton-specs's past year of commit activity
    Haskell 4 MIT 2 71 6 Updated Oct 16, 2026
  • stylus-bench-results Public Forked from OpenZeppelin/rust-contracts-stylus

    Repository for benchmarking AI models on repetitive task with bumping Stylus SDK

    OpenZeppelin/stylus-bench-results's past year of commit activity
    Rust 0 MIT 85 0 0 Updated Oct 16, 2026
  • openzeppelin-contracts Public

    OpenZeppelin Contracts is a library for secure smart contract development.

    OpenZeppelin/openzeppelin-contracts's past year of commit activity
    Solidity 27,288 MIT 12,400 217 (1 issue needs help) 138 Updated Oct 16, 2026
  • sandbox-smart-contracts Public Forked from thesandboxgame/sandbox-smart-contracts

    Fork of sandbox-smart-contracts

    OpenZeppelin/sandbox-smart-contracts's past year of commit activity
    TypeScript 2 MIT 98 0 5 Updated Oct 16, 2026
  • openzeppelin-contracts-upgradeable Public

    Upgradeable variant of OpenZeppelin Contracts, meant for use in upgradeable contracts.

    OpenZeppelin/openzeppelin-contracts-upgradeable's past year of commit activity
    JavaScript 1,177 MIT 517 6 7 Updated Oct 16, 2026
  • openzeppelin-monitor Public

    A blockchain monitoring service that watches for specific on-chain activities and triggers notifications based on configurable conditions.

    OpenZeppelin/openzeppelin-monitor's past year of commit activity
    Rust 144 AGPL-3.0 59 8 11 Updated Oct 16, 2026
  • OpenZeppelin/tron-contracts-upgradeable's past year of commit activity
    Solidity 0 MIT 0 0 7 Updated Oct 16, 2026
  • canton-contracts Public

    OpenZeppelin library for secure smart contract development on Canton

    OpenZeppelin/canton-contracts's past year of commit activity
    Haskell 5 MIT 0 20 5 Updated Oct 16, 2026