Solana Outperforms Bitcoin on a Decentralization Metric, Yet Faces Software‑Bug Risks

ARK Invest and Glassnode released a scorecard that measures the smallest group of block‑production entities required to cross a protocol‑relevant control threshold. The report, dated September 1, ranks Bitcoin first in a composite decentralization ranking, while Solana requires a larger coalition of validators to reach the same threshold.

Key Metric Comparison

• Bitcoin: 3 mining pools control enough hash‑rate to coordinate 59 % of block production.
• Ethereum: 3 staking entities dominate the stake‑based voting power.
• Solana: 19 validators by delegated stake can together exceed the one‑third voting‑power threshold.

Interpretation of the 3/3/19 Result

The metric, called a “critical resilience threshold,” reflects how many top entities must coordinate to influence consensus. For Bitcoin, the measure is based on hash‑rate attributed to mining pools; for Ethereum and Solana, it is based on stake delegation.

Beyond the Metric: Additional Exposure Vectors

While Solana’s higher validator count suggests broader distribution, other factors can concentrate risk:

• Infrastructure ownership – Data‑center operators, cloud platforms, and network carriers can affect many validators simultaneously.
• Software dependencies – Over 90 % of Solana stake runs on the Agave/Jito client suite, creating a shared‑code exposure.
• Exit speed – Bitcoin miners can redirect hash‑rate within seconds, whereas Ethereum validators face a rate‑limited exit process that can take weeks under stress.

Implications for Institutional Users

Institutions evaluating blockchains for settlement must consider multiple dimensions of capture risk, including:

1. Concentration of voting power or hash‑rate at protocol‑specific thresholds.
2. Geographic and infrastructure concentration of nodes and validators.
3. Shared client software and potential for a single bug to affect large portions of the network.
4. Liquidity and exit mechanisms that determine how quickly participants can withdraw resources.

Conclusion

The scorecard highlights that Solana beats Bitcoin on the specific validator‑count metric, yet its reliance on a limited set of software clients and data‑center providers introduces distinct vulnerabilities. A comprehensive decentralization assessment must weigh all exposure vectors rather than a single numeric threshold.