Independent · fact-checked June 2026
How decentralized is it, really?
A decentralization scorecard for the major blockchains and L2s — graded across consensus, nodes, client diversity, sequencer/stage and governance, with every figure sourced.
15Chains graded
9L1s
6L2s
5Dimensions
| Chain | Type | Consensus | Nakamoto / stage | Key risk | Grade |
|---|
| CCardano |
L1 |
PoS (Ouroboros) |
50+ |
A few large stake pools still matter |
A- |
| PPolkadot |
L1 |
NPoS |
50+ |
Nominator concentration |
A- |
| BBitcoin |
L1 |
PoW |
~2–3* |
Mining-pool concentration |
B+ |
| EEthereum |
L1 |
PoS |
~3* |
Lido staking share; Geth client lead |
B |
| AAvalanche |
L1 |
PoS (Snowman) |
~24 |
Single dominant client (AvalancheGo) |
B- |
| SSolana |
L1 |
PoS + PoH |
~29 |
Validator count fell ~65% to ~770 |
C+ |
| AArbitrum One |
L2 |
Optimistic rollup |
Stage 1 |
Centralized sequencer |
C+ |
| OOP Mainnet |
L2 |
Optimistic rollup |
Stage 1 |
Centralized sequencer |
C+ |
| SStarknet |
L2 |
ZK rollup |
Stage 1 |
Centralized sequencer |
C |
| BBase |
L2 |
Optimistic rollup |
Stage 1 |
Coinbase-run sequencer |
C |
| IInk |
L2 |
Optimistic rollup (OP Stack) |
Stage 1 |
Centralized sequencer |
C |
| SSui |
L1 |
PoS (Move) |
Concentrated |
Validator concentration; pricey nodes |
C- |
| ZzkSync Era |
L2 |
ZK rollup |
Stage 0 |
Operator-dependent (Stage 0) |
C- |
| BBNB Chain |
L1 |
PoSA |
~8 |
~45 validators; heavy Binance influence |
D |
| TTron |
L1 |
DPoS |
Low (27 SRs) |
27 Super Representatives; founder influence |
F |
Sorted best → worst. Grades are an opinionated synthesis of cited metrics (Chainspect / Nakaflow (Nakamoto), L2BEAT (stages), clientdiversity.org — 2026) — see the methodology. Not financial advice.
Read the grade
AStrongly decentralized
BDecentralized, minor caveats
CPartly — real centralization vectors
DCentralized on key layers
FHighly centralized
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Frequently asked questions
What does “decentralized” actually mean?
Decentralization isn’t one number — it spans several layers: who produces blocks (consensus), how many independent nodes enforce the rules, whether multiple software clients exist, who can change the protocol (governance), and how power is distributed politically. A chain can be strong on one and weak on another, which is why we grade across dimensions.
What is the Nakamoto coefficient?
The Nakamoto coefficient is the minimum number of independent entities that would need to collude to compromise a network — to halt it or censor it. Higher is better. As a rough guide, below 5 is dangerously centralized, 5–20 is moderate, and above 20 is reasonably decentralized.
Which is the most decentralized blockchain?
By Nakamoto coefficient, Cardano and Polkadot lead (50+), with Avalanche (~24) and Solana (~29) reasonably decentralized. Bitcoin and Ethereum score low on that single metric due to mining-pool and staking-pool concentration, yet lead on node count and credible neutrality — which is why our grades weigh several dimensions, not just one number.
Are L2s decentralized?
Not fully — yet. L2BEAT grades rollups in stages: Stage 0 (operator-dependent), Stage 1 (forced-exit guarantees + a security council + upgrade delays), and Stage 2 (fully decentralized). In 2026, Arbitrum, OP Mainnet, Base, Starknet, Scroll and Ink are Stage 1, while zkSync Era and Linea are Stage 0 — and every major L2 still runs a centralized sequencer.
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