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Ethereum vs Polkadot

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

EthereumPolkadot
GradeBA-
TypeL1 · PoSL1 · NPoS
Nakamoto coefficient~3*50+
Node / validator set~1M validators · many node operators~300–600 validators
Clients / sequencerExec: Geth ~41%, Nethermind ~38%, Besu ~16% (improving)Multiple implementations (Polkadot SDK)
GovernanceOff-chain rough consensusFully on-chain (OpenGov)
Key riskLido staking share; Geth client leadNominator concentration

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

Polkadot A-

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

Bottom line

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