Skip to content

We build technology to bring freedom to the world

Founded in 2015, OpenZeppelin is the world leader in securing blockchain applications and smart contracts. Its bedrock open source Contract Libraries are a public good and industry standard for smart contract development. OpenZeppelin’s professional expertise, unified with the Defender developer security platform, integrates through clients’ development lifecycles, so teams can plan, code, audit, deploy and operate projects faster and more safely.

Clients and Partners

Over the years we’ve gained the trust of the leading organizations in the space.

A distributed team working with distributed technologies

Team members are spread across multiple locations in North America, Europe, Asia,
Latin America, and Oceania


For general inquiries, including partnership opportunities, please email

For security issues, please email