L1 Validators vs. Ethereum L2’s: Cost Comparison for Chain Operators
This report compares the operational on-chain costs of launching an alternative Layer-1 (“alt-L1”) blockchain versus building an Ethereum Layer-2 (L2) with respect to validator rewards, data availability (DA), and zero-knowledge (ZK) proof costs. Alt-L1s support security via decentralized validators: they incur costs through token issuance and sharing transaction fees or MEV. These validator expenditures vary greatly depending on the chain’s token model and price. L2s, in contrast, inherit Ethereum’s settlement security; their major on-chain expense is paying for data posted to Ethereum (data availability) plus, if using ZK rollups, additional proof generation costs.
Using recent data, Conduit finds that L2s generally enjoy much lower and more predictable DA costs compared to the validator costs of alt-L1s. For example, Celo—as it transitioned from L1 to L2—paid ~$641,540 in validator costs over 30 days vs. about $1,070 in DA costs for a comparable period as an L2. However, ZK proving can substantially increase L2 costs (e.g. raising per-MB cost dramatically), though these expenses are trending downward, especially at scale.
Beyond direct onchain costs, offchain expenses (validator recruitment, infrastructure, engineering) also tend to be higher for alt-L1s. The report argues that while L1s are more expensive, they offer benefits like credible neutrality and stronger token utility—important for institutional or finance-adjacent use cases. L2s are better suited for projects emphasizing cost efficiency, performance, and fee-based monetization. The decision hinges on trade-offs: cost vs. control, tokenomics vs. scalability.
