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Polkadot vs Ethereum

Which is more decentralized — Polkadot or Ethereum? A side-by-side on consensus, nodes, clients and governance.

PolkadotEthereum
GradeA-B
TypeL1 · NPoSL1 · PoS
Nakamoto coefficient50+~3*
Node / validator set~300–600 validators~1M validators · many node operators
Clients / sequencerMultiple implementations (Polkadot SDK)Exec: Geth ~41%, Nethermind ~38%, Besu ~16% (improving)
GovernanceFully on-chain (OpenGov)Off-chain rough consensus
Key riskNominator concentrationLido staking share; Geth client lead

Polkadot A-

  • High Nakamoto coefficient (50+)
  • Fully on-chain governance (OpenGov)
  • Broad, rotating validator set
  • Nominator stake can concentrate
  • Complex multi-chain security model

Ethereum B

  • ~1M validators across many operators
  • Improving client diversity (no client > 2/3)
  • Largest decentralized app ecosystem
  • Staking-pool concentration (Lido share)
  • Geth still the leading execution client

Bottom line

Elite on governance decentralization; strong on consensus. Strong on breadth; the work left is reducing staking-pool and client concentration.