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Crypto Cloud Dependence Exposes Decentralization Blind Spot

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Highlights:

  • AWS outage disrupted Coinbase for 3+ hours while Ethereum kept producing blocks.
  • AWS hosts 14.4% of Ethereum validators, rising to 22.2% among professionals.
  • Cloud, RPC and frontend failures can restrict crypto access without halting consensus.

Crypto cloud dependence became known during the October 20, 2025 AWS outage, even as Ethereum continued producing blocks. Coinbase reported 3 hours and 17 minutes of degraded performance across trading, deposits, withdrawals, staking, and other services.

Base also reported reduced sequencer and RPC capacity while AWS services in US-EAST-1 suffered major disruptions. The incident separated blockchain consensus from the system that people use to reach exchanges, applications, and network services.

Crypto Cloud Dependence Appeared During AWS Outage

AWS said the incident affected DynamoDB DNS resolution, EC2 provisioning, network load balancers, and several connected services. Coinbase later said some vendors experienced the same AWS disruption, complicating diagnosis and communication. Metrika measured Base block-space utilization near 16%, less than half its normal level.

It also recorded average finalization times near 78 minutes, compared with roughly 14 minutes under normal conditions. Metrika estimated about 14% of Ethereum nodes were hosted on AWS during the October 2025 disruption. Ethereum continued operating, while several services built around blockchain access experienced huge performance problems.

Validator Hosting Shows Uneven Infrastructure Concentration

Rated estimates place AWS at about 14.4% of all Ethereum validator hosting. Hetzner follows at 6.5%, while OVH holds 5.1%, Comcast 5%, and Oracle about 4%. However, hosting concentration becomes more visible when Rated isolates professional validators. AWS then represents about 22.2%, while Google Cloud reaches 13.4% and OVH accounts for 11.3%.

Hetzner represents 8.7% of professional Ethereum validator hosting, followed by TeraSwitch at 6.6% and Azure at 5.1%. Rated derives these estimates by probing Ethereum’s peer-to-peer network and resolving observed IP addresses to hosting providers. The figuresSpot-check describe accessible infrastructure rather than a complete physical census of every Ethereum validator.

Solana presents another pattern, with recent trackers placing TeraSwitch near 27% of network stake. One tracker estimated the three largest hosting providers together accounted for about 48.3% of measured stake. Solana Foundation delegation rules include a 15% data-center threshold and a 25% ASN or hosting-company threshold.

RPCs and Frontends Add Another Access Layer

Infrastructure exposure extends beyond validators because wallets and applications often reach blockchains through third-party RPC providers. Ethereum’s 2026 Trillion Dollar Security report lists infrastructure and cloud security separately from consensus security.

The report names RPC providers, AWS, CDNs, DNS services, cloud-hosted validators, and Layer 2 systems as dependencies. MetaMask documentation states its normal blockchain connection uses Infura, although users can select another provider.

The Tornado Cash sanctions episode showed how access infrastructure can change without removing an underlying Ethereum contract. ConsenSys confirmed that Infura terminated Tornado Cash accounts after U.S. Treasury sanctions were announced in August 2022. The contracts remained on Ethereum, while alternative interaction methods remained technically available. That difference shows crypto cloud dependence at the access layer rather than through direct control of consensus.

Solana faced a separate disruption in November 2022 when Hetzner blocked Solana nodes from its infrastructure. More than 1,000 validators reportedly went offline, while roughly 22% of Solana stake became delinquent. The Solana Foundation later described the disruption as effectively equivalent to a 20% attack on the network. Solana continued operating despite the hosting loss.

Ethereum developers are working on tools intended to reduce reliance on centralized infrastructure providers. Light clients can verify blockchain information without relying entirely on a single RPC service for trusted data.

The Portal Network is intended to share Ethereum data through peer-to-peer systems instead of specific centralized RPC servers. In addition, distributed validator technology (DVT) can spread validator operations across machines, locations, clients, and data centers.