> For the complete documentation index, see [llms.txt](https://docs.concha.network/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.concha.network/about-concha/what-is-concha.md).

# What is Concha?

Concha is a modular zk-rollup layer 3 on top of Rootstock (layer 2 on Bitcoin), built with Polygon CDK and Celestia DA. It addresses the critical challenges of scalability, interoperability, and user experience that have hindered blockchain's mainstream adoption. Concha envisions and supports a burgeoning ecosystem of consumer applications ranging from on-chain gaming and social media to work platforms, e-commerce and education.