Kusama

kusama.network

Kusama is a scalable network of specialized blockchains built using Substrate and nearly the same codebase as Polkadot. The network is an development environment for teams who want to move fast and innovate on Kusama, or prepare for deployment on Polkadot. Kusama was founded in 2019 by Gavin Wood, founder of Polkadot and co-founder and former CTO of Ethereum.