August 25, 2019 Polkadot launches ‘Kusama’ testnet, plans mainnet launch for late 2019.

In development for over two years following a $144 million ICO in late 2017, Polkadot is an interoperability framework among existing blockchains and future Polkadot ‘parachains’. Kusama utilizes a Proof of Authority consensus mechanism and tests various functionality in Polkadot’s on-chain governance design. One percent of all DOT tokens at genesis will be allocated according to Kusama token holdings.