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Cardano is PoS and released its testnet last month. Tezos is another.

• haasted 7y ago
  Cosmos is PoS and released its mainnet in March.
  • leppr 7y ago
    A Proof of Stake consensus for a public blockchain like Ethereum has different requirements and is substantially harder to execute than for a permissioned network.
    • haasted 7y ago
      Definitely agree, although it’s important to clarify that Cosmos is not permissioned. Anyone can start a validator and join the validating set.