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Announcing the launch of ZeppelinOS

Thank you for your interest in this post! We’re undergoing a rebranding process, so please excuse us if some names are out of date. Also have in mind that this post might not reference the latest version of our products. For up-to-date guides, please check our documentation site.

Today we’re excited to announce the first mainnet release of ZeppelinOS, a platform for developing, managing, and operating smart contract applications in Ethereum. You can start using it right now at

Until now, it was difficult and costly to fix problems in smart contracts. Hundreds of millions of dollars were put at risk because of easy-to-fix vulnerabilities, but fixing them was too costly or even impossible. With ZeppelinOS, that will no longer be a problem. Developers can now build smart contracts that can be easily upgraded over time.

In addition, ZeppelinOS provides a library of standard and secure smart contract code that’s already deployed on the Ethereum blockchain and that developers can easily connect to their applications. This library is open-source and maintained by a community of 100+ contributing developers all around the world.

We want ZeppelinOS to be extremely easy to use—that’s why we were its first users, with two sample smart contract apps we enjoyed building: Basil and Crafty. Basil allows users to change the color of the light illuminating our pet basil plant located in Zeppelin’s headquarters. Crafty is a blockchain-based crafting game that allows anyone to create new tokens by combining existing ones. We hope that taking a look at these two apps will help show how easy it is to either build or integrate upgradeability into your smart contract application.

We’re happy to be delivering on our roadmap and excited for what’s to come with the launch of the ZeppelinOS Kernel and the ZEP token. With the Kernel, developers will be able to register new, improved releases of the standard library of smart contract code by burning—i.e. spending—a small number of ZEP tokens. Users of ZeppelinOS will then be able to vouch their ZEP tokens for that particular release, signaling it as the safest to use and allowing the developer to get a fraction of the ZEP tokens vouched as a reward. For more details on the ZeppelinOS ecosystem and the ZEP token, please refer to our white paper.

ZeppelinOS is already live in mainnet, so visit and get started.

We look forward to receiving your feedback and contributions. You can also subscribe to our newsletter to get the latest updates of upcoming releases. Let’s continue buidling the decentralized future together!

Zeppelin builds key infrastructure for easily developing and operating smart contract applications on top of public blockchains. We also conduct security audits of decentralized applications. Networks worth over $4.5 billion have been built with our systems.