# Optimism Says ZiskVM Team Is Testing Its OP Stack Framework By Simon Yoon Canonical URL: https://www.tokenpost.com/news/technology/50535 Published: 2026-11-07T03:01:38.000Z Updated: 2026-11-07T03:01:38.000Z Section: Technology > The open-source stack is used to build Ethereum layer-2 networks. World, Unichain and Soneium operate their own OP Stack networks, while Ink uses OP Enterprise. Optimism said the ZiskVM team is experimenting with its OP Stack, an open-source framework used to build Ethereum layer-2 networks. Teams can use the stack to operate independent chains. World, Unichain and Soneium run their own OP Stack networks, while Ink uses OP Enterprise. These networks operate independently, so moving assets between them requires a bridge. The [OP Stack’s network model]() also includes applications on OP Mainnet, the ecosystem’s shared chain. ## Links in this article - [OP Stack’s network model](https://www.tokenpost.com/news/technology/33659)