ARK Invest and Glassnode Publish Decentralization Scorecard for Solana

ARK Invest and Glassnode published a joint white paper on September 1 that replaces the blockchain industry's vague framing of "decentralized" with a quantifiable spectrum. The report, titled "The Decentralization Spectrum: Design Tradeoffs In Digital Assets," scores Solana SOL$100.06-3.4% SOL (SOL), Bitcoin, and Ethereum across six measurable dimensions and four design features. The results for Solana are precise enough to be useful and complicated enough to require more than a headline.

The report's central argument is that no network leads on every dimension, and that Solana's architectural position reflects deliberate choices, not oversights. "Solana trades decentralization for performance and coordination speed," the report states. Different use cases tolerate different risk profiles, it argues: a high-throughput payment network and a settlement layer for high-value institutional assets sit at different points of the spectrum on purpose.

How Solana Scores Across Six Decentralization Dimensions

The framework evaluates networks on ownership distribution, exit fluidity, network verification overhead, critical resilience threshold, blockchain reconstruction overhead, and geographic/provider resilience. Solana's scores span that range, with materially stronger results on some dimensions than others.

The strongest result is on critical resilience threshold, where Solana's Nakamoto coefficient of 19 exceeds Bitcoin and Ethereum. Geographic/provider resilience and auditability are the areas of greatest weakness. That asymmetry, between a distributed validator set and concentrated physical infrastructure, defines Solana's position on the spectrum.

Nakamoto Coefficient of 19: What Solana's Validator Distribution Actually Shows

The Nakamoto coefficient measures the minimum number of independent actors that would need to coordinate to alter the ledger. Solana's score of 19 is the highest of the three networks. Bitcoin and Ethereum each register 3 on this dimension, reflecting mining pool and validator concentration where a small number of entities controls enough of the network to constitute a threat.

The report qualifies, though, that pools and delegation can complicate that picture. Liquid staking protocols and delegation flows concentrate effective voting power above what raw validator counts show. At best, it marks a floor on collusion risk, not a ceiling.

Data Centers by Design: Solana's Infrastructure Concentration

The dimension where Solana scores most poorly is infrastructure geography. Approximately 100% of Solana validators run in commercial data centers, according to the report. Bitcoin, by contrast, runs an estimated 63% of its nodes behind Tor with substantial residential participation; only about 16% of Bitcoin nodes operate in data centers. Ethereum sits between the two, with Amazon Web Services hosting approximately 20% of its nodes.

The hardware requirement drives this split. Running a Solana full node requires approximately $21,478 in enterprise-grade hardware; a five-year archive node runs roughly $94,000, per independent analysis of the white paper. Bitcoin's equivalent is $289; Ethereum's is $730. Those cost gaps make residential participation at Solana's performance layer economically impractical for most individuals. The report frames this as the cost of throughput: the same hardware requirements that allow Solana to process transactions at scale also filter the validator set toward professional operators.

Geographic stake concentration follows from that model: 55.3% of Solana's stake is concentrated in three countries.

SIMD-228 as a Governance Maturity Indicator

The report uses SIMD-228 as a governance case study. ARK and Glassnode include governance as one of the four design features scored, and cite Solana's improvement proposal process as evidence of a network that can coordinate economically significant parameter changes through a defined deliberative process. SIMD-228, which proposed adjusting Solana's inflation schedule in response to shifting staking economics, required sustained technical debate and a formal on-chain vote before proceeding.

For context on where Solana's governance infrastructure stands today, the Solana governance system recently went live with three tokenomics proposals in formal vote, including changes to issuance, fee distribution, and validator incentives. The ARK/Glassnode report's governance scoring reflects a network that has moved from informal coordination toward structured on-chain process.

What the Scorecard Means for Solana's Institutional Use Cases

The report's institutional framing is direct: different decentralization positions suit different applications. A settlement layer for high-value institutional assets and a high-throughput payment network require different risk profiles, and the report treats neither position as inherently superior.

The institutional case for Solana, in the report's framework, rests on validator-set distribution that resists collusion at the ledger level, performance that requires professional infrastructure, and governance maturity demonstrated through a functioning proposal process. Geographic distribution and residential node accessibility are where Solana scores weakest, and where the performance tradeoff is most explicit. Institutions evaluating Solana for payment-layer or high-throughput clearing applications will weigh those dimensions differently from institutions evaluating a base-layer store of value.

The report also challenges how the industry frames the decentralization question itself. Solana's lower scores on geographic resilience and auditability are architectural choices with quantifiable performance benefits on the other side. Understanding those tradeoffs precisely, rather than treating "decentralized" as a binary pass/fail, is what the ARK and Glassnode framework provides.

The full white paper is available at research.glassnode.com.