OpenZeppelin

• Name: OpenZeppelin
• URL: https://www.openzeppelin.com/
• Category: smart-contract security / contract standards / developer tooling / operational security platform
• Tags: ethereum-ecosystem
• Summary: OpenZeppelin is foundational Ethereum security and contract infrastructure that has expanded into relaying, monitoring, upgrades, UI generation, and adjacent tooling. It is broader than an audit shop or a single Solidity library, but the contracts base is still the anchor.
• What it does:
  • Maintains modular smart-contract libraries for Ethereum/EVM and additional ecosystems including Starknet, Sui, Arbitrum Stylus, Stellar, Midnight, Polkadot/Substrate, and Zama’s FHEVM-oriented stack
  • Provides core standards and building blocks for tokens, access control, governance, account abstraction, utilities, and upgradeable-contract workflows
  • Ships development and operations tooling including Contracts Wizard, Upgrades Plugins, Relayer, Monitor, UI Builder, and the legacy Defender platform
  • Offers security services and research, with the homepage emphasizing audits and the broader brand framing itself as a security standard for onchain finance
  • Publishes open educational and community artifacts such as Ethernaut and multiple public repos that act as part of the project’s operational source of truth
• Key claims:
  • The homepage positions OpenZeppelin as “The Security Standard for Onchain Finance” and emphasizes battle-tested contract libraries and security review work
  • Contracts docs describe OpenZeppelin Contracts as a library of modular, reusable, secure smart contracts for Ethereum and enumerate core surfaces such as token standards, access control, governance, account abstraction, and upgradeable contracts
  • The docs homepage shows OpenZeppelin now spans many ecosystems beyond Solidity/EVM, including Starknet, Sui, Arbitrum Stylus, Stellar, Midnight, Polkadot, and confidential/FHEVM-focused contracts
  • Relayer docs show OpenZeppelin also operates in backend infrastructure territory, covering EVM and non-EVM transaction relaying, signing, fee estimation, monitoring, plugins, and observability
  • The public GitHub organization exposes a large open-source surface area including core contracts, upgradeable variants, community contracts, Cairo contracts, Stylus/Rust contracts, Uniswap hooks, Stellar contracts, confidential contracts, Ethernaut, Contracts Wizard, Relayer, Monitor, and UI Builder
• Whitepaper: No classic standalone OpenZeppelin whitepaper or litepaper was found during this pass. The strongest primary materials were the official homepage, docs portal, Contracts and Relayer docs, and public GitHub organization; see ../whitepapers/openzeppelin-primary-sources-2026-04-25.md.
• Sources:
  • https://www.openzeppelin.com/
  • https://docs.openzeppelin.com/
  • https://docs.openzeppelin.com/contracts
  • https://docs.openzeppelin.com/relayer/1.4.x
  • https://github.com/OpenZeppelin

Internal linkages

• Best anchors: openzeppelin-relayer, safe, and tenderly.

• Last reviewed: 2026-04-25 UTC