OpenZeppelin
Open-source Solidity contract library plus smart contract audits and security services.
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OpenZeppelin key facts
| Category | Smart contract tool |
|---|---|
| Chains | Ethereum and EVM networks |
| Platforms | Web, Library |
| Open source | Yes, OpenZeppelin Contracts under MIT on GitHub |
| Company | OpenZeppelin; S&P Global has agreed to acquire it |
| Launched | 2016 (Contracts repository created August 2016) |
What is OpenZeppelin?
OpenZeppelin publishes OpenZeppelin Contracts, an open-source Solidity library under the MIT license, plus a Contracts Wizard, audits and open-source Monitor and Relayer tools. Its homepage states that 9 of the top 10 stablecoins are built on OpenZeppelin Contracts and announces an agreement for S&P Global to acquire the company.
OpenZeppelin pros and cons
- Contracts library is free under MIT
- Contracts Wizard generates token and governance contracts
- Homepage states 9 of the top 10 stablecoins use its contracts
- Audits are a paid, quote-based service
- Ownership is changing: S&P Global has agreed to acquire the company
OpenZeppelin FAQ
What is OpenZeppelin?
OpenZeppelin publishes OpenZeppelin Contracts, an open-source Solidity library under the MIT license, plus a Contracts Wizard, audits and open-source Monitor and Relayer tools. Its homepage states that 9 of the top 10 stablecoins are built on OpenZeppelin Contracts and announces an agreement for S&P Global to acquire the company.
Which chains does OpenZeppelin support?
Ethereum and EVM networks.
Sources
How this page works
Sources: OpenZeppelin: official site, OpenZeppelin: Contracts on GitHub, OpenZeppelin: Home. Data as of Sep 26, 2026.
Not affiliated with any project listed. Educational content, not financial advice.